WO2009154301A1 - Block for processing dental prostheses, and manufacturing method therefor - Google Patents

Abstract

Provided is a method for manufacturing dental prostheses processing blocks which are used when manufacturing dental prostheses using CAD/CAM. A mold, the inner surface of which has the shape of the outer shape of a block, is partially filled with a resin material which contains an inorganic filler. Then rotational agitation is performed, followed by polymer curing. By repeating this process, not only monochromatic blocks, but blocks with color gradients can be manufactured as well. The obtained processing blocks are strong even after processing, excel aesthetically, and can be manufactured by a simpler method.

Description

 Description Title of invention Block for processing dental prosthesis and manufacturing method thereof Technical Field

 The present invention relates to a dental prosthesis processing block suitable for manufacturing a dental prosthesis by CADCAM (Computer Aided Design / Computer Aided Manufacturing Method) and a manufacturing method thereof. Background art

 In the field of dental prosthesis manufacturing using CADCAM, in order to improve CADCAM performance and reduce costs, the prosthesis model obtained from the oral cavity is accurately converted into data, and the prosthesis processing block is accurately created. Since the equipment for grinding and cutting can be easily obtained, accurate and quick production of dental prostheses has been realized.

In manufacturing such a dental prosthesis, a resin block, a ceramic block, or a hybrid resin block that is a composite material of both has been proposed as a block used for processing. Here, the hybrid resin is also called a composite resin material. Ceramic blocks are made of materials that are harmless to the living body, and are excellent in aesthetics. However, due to the occurrence of microcracks caused by impacts such as machining, cracks occur frequently during use, and for long-term use. In addition, it is necessary to carry out additional processing such as covering processing. On the other hand, resin blocks including hybrid resin blocks do not lose their strength even if they are processed by cutting, grinding, etc., compared to ceramic blocks. When processing is necessary, and when creating a block by overlaying multiple resins In order to obtain an integrated structure, sufficient bonding by pressing is necessary, and there are many problems in manufacturing.

 In addition, in order to obtain a color tone close to natural teeth, as a conventional example, a rod-shaped body obtained by mixing a polymer powder made of polymethyl methacrylate and methyl methacrylate ク リ is pressurized, heated and pressurized for polymerization, Another method is known in which, for example, a rod-like body made of the same material for enamel is superposed and pressure-molded and then polymerized. However, when this method is carried out, after all, it is necessary to fill the rod-shaped body sufficient for the shape of the mold for pressure molding, and degassing that is difficult with the rod-shaped body must also be performed separately. It becomes a complicated manufacturing method. In addition, when the pressure is not firmly applied, the interface at the interface becomes insufficient and the masticatory force may not be able to be maintained. In particular, the prosthesis obtained is inevitably deteriorated during long-term use. In addition, some prosthetics are formed by injection molding instead of pressure molding, but although workability is obtained, there is a problem in mechanical strength as described above, and degradation is a problem even in the long term. Become.

More specifically, referring to patent documents, Patent Document 1 describes an inorganic filler having an average particle size of 0.001 to 0.0 suitable for manufacturing a dental prosthesis using a CA D CAM device. A dental resin material comprising an acrylic resin polymer containing 20 to 70% by weight is described. Patent Document 2 describes a polymer resin and a filler, which are suitable for manufacturing a dental prosthesis by a CAD CAM procedure and are substantially crack-free and manufactured to pass a thermal shock test. Including mill blanks. Further, Patent Document 3 is located in an alveolar bone that is in contact with soft tissue, and is a bone tissue proximity surface extending from the tip of the dental implant to the interface at the neck portion of the dental implant, and a shoulder of the dental implant from the interface. A soft tissue proximate surface extending to the shoulder and the shoulder is inclined relative to the axis of the dental implant. ing. Prior art documents

Patent Literature

 Patent Document 1 Japanese Patent Application Laid-Open No. 10 0-3 2 3 3 5 3

 Patent Document 2 Special Table 2 0 0 3-5 2 9 3 8 6

 Patent Document 3 Japanese Patent Laid-Open No. 2 0 0 5 1 2 7 0 6 60 0 Summary of the Invention

Problems to be solved by the invention

 As described above, any conventional resin block, ceramic block, or composite resin block proposed for processing a dental prosthesis has a problem to be solved. In particular, ceramic blocks are often cracked shortly after their manufacture, and a prosthesis that can be used stably is about the size of an inlay that can be prosthetic in areas where external pressure is not applied. In addition, the resin block is complicated in the processing of foam and the like, and in the case of obtaining a gradation of color tone with the aim of achieving an aesthetic effect, an embossing process is used. In this case, the strength varies.

The object of the present invention is therefore suitable for the manufacture of dental prostheses using CAD CAM, has excellent aesthetic effects, has excellent mechanical strength without special processing such as coating treatment, and is stable over a long period of time. Excellent for workability such as cutting and grinding, without bubbles remaining inside the block, and multiple layers of resin to obtain a natural color tone and further improve the aesthetic effect Improved dental prosthesis processing block and method for manufacturing the same, which can firmly bond the resins together without a pressing process even when gradation is given by color matching Is to provide. Means for solving the problem

 As a result of diligent research to achieve the above-mentioned object, the present inventors have filled a saddle shape having a block shape with a composite resin material (hybrid resin material) containing an inorganic filler such as a ceramic filler. However, it is preferable to carry out a polymerization and curing process under a vacuum under a vacuum to realize a gradient block for processing a dental prosthesis that is easily degassed and has a strong bonding force even though it is an easy manufacturing method. I got the knowledge to get. In the present invention, in particular, a gradient with a blurred boundary is formed by partially forming a resin layer while inserting a shielding object (partition wall) having a plurality of protrusions into one bowl shape. It is possible to realize gradation blocks for processing dental prostheses. In this block, while the processed prosthesis color has a more natural aesthetic, the binding force between the resins that make up the block is strong, and the dental prosthesis can be used stably over a long period of time. it can.

 In one aspect, the present invention is a method of manufacturing a dental prosthesis processing block comprising:

 Preparing a bowl having an inner surface shape corresponding to the outer surface shape of the block;

 Filling the saddle mold with a composite resin material containing a resin and an inorganic filler dispersed in the block, the block being formed by a curing process;

 A step of subjecting the composite resin material to rotational stirring while the composite resin material is housed in the saddle shape;

And a step of curing the composite resin material after the stirring treatment by polymerization. In another aspect, the present invention also relates to a dental prosthesis processing block manufactured by the method of the present invention described above and described in detail below, and its use and processing, for example, processing of a dental prosthesis. The invention's effect

 According to the present invention, as can be understood from the following detailed description, the strength and strength of the composite resin material can be reduced by repeating the rotary stirring operation and the polymerization treatment while the composite resin material is injected into the vertical shape, while being a simple process. Excellent and uniform material, can form a dental prosthesis processing block suitable for CADCAM processing. According to the present invention, in particular, it has an excellent aesthetic effect, excellent mechanical strength without special treatment such as coating treatment, can be used stably over a long period of time, has excellent workability such as cutting and grinding, and foam. When the block is formed by overlapping a plurality of resin layers, the resin layers are firmly bonded to each other without a pressurizing step, and the color tone close to natural and Furthermore, it is possible to form a dental prosthesis processing block having an improved aesthetic effect and a gradation in color tone. Brief Description of Drawings

 FIG. 1 is a cross-sectional view for sequentially explaining one embodiment of the present invention. FIG. 2 is a schematic diagram for explaining a rotation stirring process performed in accordance with the present invention in the embodiment of FIG.

 3 is a front view (a) and a perspective view (b) of a block manufactured according to the embodiment of FIG.

 FIG. 4 is a cross-sectional view illustrating another embodiment of the present invention step by step.

Fig. 5 The rotary stirring process performed in accordance with the present invention in the embodiment of Fig. 4 It is a schematic diagram explaining the process.

 6 is a perspective view of a block manufactured according to the embodiment of FIG. 4. FIG. 7 is a vertical perspective view that can be used when a plurality of blocks are manufactured simultaneously.

 FIG. 8 is a front view (a) of the rib member used in the embodiment of FIG. 1 and a sectional view (b) for explaining a state in which the rib member is attached to the saddle type.

 FIG. 9 is a cross-sectional view illustrating another embodiment of the present invention step by step.

 FIG. 10 is a cross-sectional view of members used to implement another embodiment of the present invention.

 FIG. 11 is a cross-sectional view illustrating the method of manufacturing one member of FIG. 10 in order.

 FIG. 12 is a cross-sectional view illustrating the method of manufacturing the other member of FIG. 10 step by step.

 FIG. 13 is a cross-sectional view for step-by-step description of another embodiment of the present invention using the member shown in FIG.

 FIG. 14 is a perspective view (a) and a top view (b) drawn from a photograph of a block manufactured according to the embodiment of FIG.

 FIG. 15 is a cross-sectional view for explaining still another embodiment of the present invention step by step.

 FIG. 16 is a schematic view showing one embodiment of the present invention.

 FIG. 17 is a schematic diagram for explaining one embodiment of the present invention.

 FIG. 18 is a schematic diagram for explaining one embodiment of the present invention.

 FIG. 19 is a schematic view for explaining one embodiment of the present invention.

FIG. 20 is a schematic view showing another embodiment (half) of the present invention. FIG. 2 is a schematic diagram showing another embodiment (second half) of the present invention.

BEST MODE FOR CARRYING OUT THE INVENTION

 The present invention can be advantageously implemented in various forms. Hereinafter, preferred embodiments of the present invention will be described with reference to the accompanying drawings.

 The present invention provides a step of preparing a saddle mold having an inner surface shape corresponding to an outer surface shape of a block in manufacturing a dental prosthesis processing block;

 Filling a vertical mold with a composite resin material containing a resin and an inorganic filler dispersed in the block, the block being formed by a curing process;

 A step of subjecting the composite resin material to a rotary stirring process while the composite resin material is housed in a vertical shape;

 Curing the composite resin material after the stirring treatment by polymerization;

Are sequentially implemented.

 In the block manufacturing method of the present invention, in one form, the block is composed of an integral combination of a plurality of block members, and in the filling process, the composite resin material is filled in a plurality of times, and each filling is performed. It is preferable that after the step, a rotating stirring treatment step and a curing step are sequentially performed, and after the final curing step, the obtained cured product is further polymerized and cured to form a bonded body.

In the method of the present invention, in one form, the block is composed of an integral combination of a plurality of block members, and in the filling process, a plurality of composite resin materials having different hues are prepared and sequentially provided. Filling, and after each filling process, rotating stirring process step and curing process under vacuum It is preferable that the steps are sequentially performed, and after the final curing step, the obtained cured product is further overlapped and cured to form a bonded body.

 Also, in one form of the method of the present invention, in the filling step, instead of creating a block member by sequentially filling the composite resin material, subjecting it to a rotary stirring process, and further curing it on site. It is preferable that the method further includes a step of loading a block member produced by filling the composite resin material, subjecting it to a rotating stirring process, and further curing it at a place other than the site, into a vertical shape.

 In one form of the method of the present invention, it is preferable that the filling step further includes a step of forming a block member in the presence of the partition member disposed in the saddle mold.

 Further, in one form of the method of the present invention, it is preferable that the surface of the partition wall member includes a plurality of minute protrusions, and the pattern of the protrusions is transferred to the surface of the block member.

 In one form of the method of the present invention, in the saddle shape, the major axis direction of the block whose outer surface shape is defined by the inner surface shape is preferably substantially perpendicular or horizontal to the vertical rotation axis direction. .

 In one embodiment of the method of the present invention, in the rotary stirring process step,

It is preferable to rotate the saddle type at the same time as it rotates.

 In one form of the method of the present invention, the block further includes a rib (also referred to as a rib material), the rib is formed of a cylindrical body, and is formed in a groove portion or a part formed continuously along the outer periphery thereof. It may have a notched part.

Furthermore, this invention exists in the block for dental prosthesis processing manufactured by the method of this invention. In one form of the block of the present invention, the block is composed of an integrated combination of a plurality of block members, and the outer peripheral surface thereof. In addition, it is preferable that a gradation with a blurred boundary is given, that is, a block having a gradation (hereinafter also referred to as a “gradation block”). Further, in one form, the block of the present invention has no bubbles inside the block, that is, bubbles are prevented from being bubbled in the manufacturing process of the block. Preferably it is discharged.

 These and other aspects of the invention are then described in further detail below.

 The saddle shape used in the practice of the present invention is not particularly limited as long as it is a saddle shape having an inner surface shape corresponding to the outer surface shape of the block that is the final object. This saddle type may have a structure in which a rib material for supporting the block is detachably attached, or the rib material can be attached.

 In other words, the saddle shape used in the present invention only needs to have at least a shape that determines the block shape, and may be a vertical shape or a horizontal shape, and may be combined with a rib as necessary. May be provided. Although the vertical type is higher than the horizontal type, it is preferable in that it allows more blocks to be manufactured at one time. However, when manufacturing a gradient block, the vertical type is preferred. It is necessary to use a partition member (partition) of the mold. The vertical partition member is preferably made of a light-transmitting material capable of transmitting visible light or the like, for example, because it performs photopolymerization of the composite resin material, but the vertical type itself can transmit visible light or the like. Any partition member that is impermeable to visible light or the like may be used.

Further, the saddle mold may be composed of one mold member, or may be composed of two or more mold members. When the saddle mold is composed of two or more mold members, the respective mold members may be the same or mutually It may be different. In addition, the vertical shape may have an upper portion mainly opened, and thereby sufficient deaeration can be achieved by rotary stirring.

 The resin used in the present invention can be a resin generally used in the field of dental prosthesis processing blocks. Examples of suitable resins include, but are not limited to, for example, 卜 ethylene glycol monomethyl methacrylate, diurethane dimethyl methacrylate, urethane trimethacrylate 卜, urethane trimethyl acrylate. Rate, polyethylene glycolate, 1, 6 — hexanediol dimethacrylate, trimethylolpropane trimethacrylate, benzyl methacrylate, 2 — hydroxykistilmelate Rate, 2-hydroxypropyl methacrylate, dimethylaminoethyl methacrylate, cetylaminoethyl methacrylate, glycidyl methacrylate, te rahi drofurfuryl chloride卜, ethylene glycol emulsion, 1, 3 — butylene glycol emulsion —, Methyl methacrylate, ethyl methacrylate, n — butyl methacrylate, i — butyl methacrylate, t — butyl methacrylate, 2 — ethyl hexyl methacrylate, cyclohexyl methacrylate Relay, diethylene glycol dimethacrylate, 2, 2-bis [4- (methacryloxyethoxy) phenyl] propane, 2,2-bis [4- (methacryloxyethoxy) phenyl] propane, Examples include 2,2-bis [4- (methacryloxypolyethoxy) phenyl] propane. These resins may be used alone or in combination of two or more resins. In addition, these resins can be blended in an arbitrary amount to constitute a composite resin material. The proportion of the resin is usually 5 to 50%, preferably 15 to 30%.

In order to construct a composite resin material, fillers are used in the resin as described above. The inorganic filler to be included can include any inorganic filler. Suitable fillers include, but are not limited to, for example, inorganic composites such as silica, alumina, zirconia, silica-zirconia, phosphate power such as glass, mica, feldspar, and hydroxyapatite, and those Examples of such organic composite fillers. These fillers may be used singly or as a mixture of two or more fillers. These inorganic fillers are preferably used in the form of finely divided fine particles in order to disperse them uniformly in the resin and to achieve a good aesthetic effect. The average particle diameter of the inorganic filler is usually from 0.1 to 20 / m, and preferably from 0.3 to 5 m. In addition, the inorganic filler can be blended in an arbitrary amount to constitute the composite resin material. The proportion of the inorganic filler is usually 50 to 95%, preferably 70 to 85%. In the present invention, in one preferred embodiment, the same or different materials as the inorganic filler, preferably The same material can be used in the form of a mixture of those with the above particle sizes and those with 10 to 300 nm. By using such a filler mixture, for example, the wear resistance is improved and the filler can be filled at a high density, so that it is possible to easily form a smooth surface during polishing. Can do.

In the present invention, when producing a composite resin material, a coupling agent, preferably a silane coupling agent, may be added in order to improve dispersibility and wettability when using an inorganic filler. preferable. By adding a silane force coupling agent, it is possible to finally produce a more uniform hybrid type prosthesis. Examples of silane coupling agents include 3-methacryloxypropyltriethoxysilane, 3-methacryloxypropyljetoxysilane, and 3-methacryloxy. Examples include cyclopropyltrimethoxysilane and 3-methylpropyloxydimethoxysilane. The addition amount of these silane coupling agents is usually 0.5 to 50% by weight, preferably 0.5 to 15% by weight, based on the inorganic filler. The addition of the silane coupling agent can be carried out by any method, but examples include the method described in the following paper: T. Nihei et al., J. Dent. Res .81 (7) : 482-486, 2002, H. Ishida et al., J Colloid. Interf ace. Sci. 64 (3): 555-564, 1978, RH Hal vorson et al., Dent. Mater. 1 9: 327-333, 2003. In addition, inorganic fillers that have already been treated with silane, for example, silica that has already been treated with silane coupling agents, can be suitably used.

In addition to the above-mentioned silane coupling agent, other additives can be arbitrarily blended in the composite resin material. Examples of suitable additives include, but are not limited to, sensitizers, that is, photosensitizers and thermal sensitizers, colorants, reducing agents, stabilizers, diluents, and the like. . These additives can be added in any desired amount to form the block of the present invention and the prosthesis, respectively. Examples of the photosensitizer and thermal sensitizer include camphorquinone, Benzyl, diacetyl, benzyl dimethyl ketal, benzyl diethyl ketal, benzyl di (2-methoxetyl) ketal, 4,4 'monodimethyl pentyl mono dimethyl ketal, anthraquinone, 1 — black anthraquinone, 2 — black Mouth anthraquinone, 1, 2 — Benzanthraquinone, 1 — Hydroxian traquinone, 1 — Methylthraquinone, 2 — Ethylanthraquinone, 1 — Bromoanthraquinone, thixanthone, 2 — isopropyl thixanthone, 2-Throthioxanthone, 2-Methylthioxanthone, 2, 4 —Zimechi Ruthioxanthone, 2, 4 — Jetylthioxanthone, 2, 4 — Diisopropylthixanthone, 2 — Chloro-7_trifluoromethyl thioxanthone, thixanthone — 1 0, 1 0 — Dioxide, thixanthone 1 0 — Oxide, benzoin methyl ether, benzoin ethyl ether, isopropyl ether, benzoin isobutyl ether, benzophenone, bis (4-dimethylaminophenyl) ketone, 4, 4 '— bisjetylamino Examples include benzophenone, acylphosphine oxide derivatives, and compounds containing an azide group. These sensitizers may be used alone or in combination of two or more.

 As the reducing agent, tertiary amine is generally used. Tertiary amines include, for example, N, N-dimethyl-p- 卜 luidine, N, N-dimethylaminoethyl methacrylate, triethanolamine, methyl 4-dimethylaminobenzoate, ethyl 4-dimethylaminobenzoate, 4 — Examples include isoamyl dimethylaminobenzoate. Examples of other reducing agents include benzoyl peroxide, azobisisoptyronitrile, sulfinic acid soda derivatives, and organic metal compounds.

Examples of the colorant include inorganic pigments such as iron oxide, titanium oxide, and alumina oxide, anatto dye, cacao dye, gardenia yellow dye, colyan dye, cochineal dye, evening onion dye, lac dye, and tamarind dye. , Red cabbage pigment, safflower yellow pigment, red radish pigment, turmeric pigment, grape juice pigment, bean tread, grape skin pigment, red maple pigment, purple imo pigment, red grape yellow pigment, Ayamurasaki pigment, gardenia blue pigment Natural pigments such as purple corn pigment, gardenia red pigment, elda berry pigment, jS_carotene, riboflavin, riboflavin butyrate ester, riboflavin 5'-phosphate ester sodium, etc. However, natural pigment derivatives such as pigment, copper chlorophyll, copper chlorophyllin sodium, iron black phylloline sodium, norbixin calcium, norbixin sodium, food red No. 2, food red No. 3, food red Color 40, food red 100 2, food red 10 06, food yellow 4, food yellow 5, food blue 1, food blue 2, aluminum rake, etc. Sudan! ! , Kinizarin Green SS, Orange SS, Sudden Blue B, Orange Red X〇, Kinolin Yellow SS, Kiichi Bon Black, Phthalocyanine Blue, Dimethyl Quinacridone, Quinacridon, Monoazo Yellow, Naphthol Blue Black And organic dyes or organic pigments. In addition, when manufacturing a gradient block, it is preferable to use a combination of three of red iron sesquioxide, yellow iron sesquioxide, white titanium oxide, etc. For example, hydroquinone monomethyl ether, hydroquinone, and diluents include acetone, ethyl acetate, ethanol, and dichloromethane.

 The present invention is characterized in that after the composite resin material as described above is filled into a saddle shape, the composite resin material is subjected to a rotating stirring treatment while the composite resin material is filled into the saddle shape.

Although the rotary stirring treatment in the present invention can be performed by any method, it can be performed by using a method and an apparatus that can rotate the vertical mold at the same time and rotate it at the same time. preferable. For example, the rotary stirring process of the present invention can be suitably carried out by using a mixer that performs rotation and revolution described in Japanese Utility Model Publication No. 3-3 6 6 13. By using a mixer that rotates and revolves, the mixing time of the composite resin material may be shortened to about 2 to 6 minutes. The rotary stirring process can easily remove bubbles with high viscosity, but even in a laminated block in which filling and rotary stirring polymerization are performed several times, A block with high strength can be manufactured as a whole. In addition, if necessary, the rotary stirring process can be performed, for example, as “Awatori Neritaro” (trade name), a rotation / revolution method mixer commercially available from Sinky Corporation, and other rotation / revolution methods. A mixer may be used.

 Further, in the present invention, it is preferable to perform a rotary stirring process under a vacuum. By applying a vacuum, it is possible to remove bubbles more sufficiently and to form a uniform mixed resin material. . The degree of vacuum to be applied is usually from 0.5 :! to 20 kPa, preferably from 0.5 to 2.OkPa.

 Furthermore, in the rotational stirring treatment of the present invention, it is possible to degas from the composite resin material having a high viscosity and to cause curing by polymerization at the same time as using a composite resin material having a low viscosity. However, faster curing and uniform curing can be achieved, which may be a favorable specification for manufacturing. In the design of the composite resin material of the present invention, it is recommended to increase the hardness by the filling amount of the filler (filler), or to impart transparency and abrasiveness by the filling amount of the fine particle filler. This is because, when such treatment is performed, an increase in viscosity can be achieved. Therefore, when improvement in performance such as hardness, transparency, and abrasiveness is required, such treatment can be an effective means. In addition, with regard to the monomers used to form the resin, it is recommended to use an increased content of a durable but highly viscous monomer such as 2, 2-bis [4- (methacryloxyethoxy) phenyl] propane. Is done.

In the present invention, it is preferable to use a combination of photopolymerization and thermal polymerization for curing the resin. That is, in the polymerization of the present invention, after first curing by photopolymerization, thermal polymerization is performed, and thereby sufficient curing and reaction can be performed to reduce the residual resin. Here, the photopolymerization is usually performed by applying visible light such as ultraviolet light or blue light for 10 to 100 seconds. After the photopolymerization was completed in this way, finally, thermal polymerization by heating at 100-150 was conducted for 100-000 seconds. It is preferable to do this.

 Subsequently, the method for manufacturing a dental prosthesis processing block according to the present invention will be described more specifically.

 In the present invention, an inorganic filler and a resin are mixed to prepare a composite resin material. In the present invention, the inorganic filler and the resin are preliminarily used by using any means or other means used for the rotation stirring process. Stir well in advance. After stirring, the resulting composite resin material (which can be called “mixed resin material” because it is a precursor that will eventually become a composite resin material) is placed in a bowl and further used as a rotary stirring means. Load it. Here, in order to perform rotational stirring and defoaming, the composite resin material is usually subjected to rotational stirring for 0.5 to 2 hours. The time for the rotary stirring treatment of the composite resin material is preferably 5 to: 10 minutes.

Simultaneously with the rotating stirring treatment, the first resin curing, that is, the resin curing by photopolymerization is performed. At this time, if the bowl-shaped material used is a material that can transmit ultraviolet light or visible light, preferably blue light, the entire amount of the composite resin material is filled in the bowl as it is and kneading and polymerization are performed. Can do. The final block is a single composite resin block. However, when the vertical material is made of a material that does not transmit ultraviolet rays or visible light, or when it is desired to increase the degree of polymerization, the composite resin material is divided into multiple portions and filled into the vertical shape. It is preferable to repeat the process of kneading and polymerizing each filler (part of the composite resin material) each time. After multiple iterations, the final block is a single composite resin block consisting of multiple resin layers. In the practice of the present invention, in the photopolymerization process, it is easy to handle, especially in the ultraviolet and visible light rays, and it is applied to the human body like ultraviolet rays. Visible light such as blue light with no danger can be preferably used. In this specification, the irradiation light for polymerization that can be suitably used is generally called “visible light”.

 As mentioned above, when a composite resin material is divided into a plurality of times and filled into a bowl and cured by photopolymerization each time, it is preferable to use a composite resin material having a different color each time. . By changing the color each time it is filled, a gradient block, that is, a block with a gradient composed of at least a plurality of colors can be realized.

 The saddle type may be provided with an opening for light irradiation in order to irradiate a predetermined amount of visible light or the like to the photopolymerizable composite resin material that is the content thereof. When the composite resin material is cured by irradiating visible light or the like from the opening, irradiation with visible light or the like can be performed by applying arbitrary irradiation conditions. For example

Depending on the intensity of visible light used, etc., when the thickness of the filled resin is about 3 to 5 mm, irradiation with visible light targeting the resin is a general purpose illumination means and illumination conditions. Can be implemented. According to the present invention, a sufficiently polymerized block is finally obtained by repeatedly performing the step of rotating and stirring the composite resin material in a bowl shape and irradiating with visible light or the like. Can obtain a prosthesis.

In the present invention, the composite resin material in the basket is subjected to photopolymerization curing with visible light or the like, and then cured by thermal polymerization. Thermal polymerization curing can be carried out under any heating condition, but is usually 1 to 24 hours at a temperature of 100 to 200. Thermal polymerization and curing by heating can be performed with the composite resin material after photopolymerization and curing in a bowl shape. Preferably, the thermal polymerization curing is 1 to 5 hours at a temperature of 100 to 1550. In accordance with the present invention, the composite resin material is divided into a plurality of times and filled into a saddle shape and rotated. When the stirring process is performed, since the photopolymerization process is mainly performed repeatedly, the resulting block is formed in a layer shape, but by rotating the stirring process after filling the composite resin material, It has almost the same strength.

 In connection with the above, an example of a saddle shape and its use will be described with reference to the horizontal saddle shape shown in FIG. 4. It consists of upper 3 3. The lower part 3 1 of the mold has a part (lower half) of the block forming part 3 2a formed by a half-recess to define the inner surface shape of the saddle mold 11 corresponding to the outer surface shape of the block. And a rib placing portion 3 2 b. As shown in the figure, the block forming part 3 2 a can be formed by superimposing the saddle upper part 3 3 on the saddle lower part 3 1.

 The vertical mold 1 1 may be pre-placed with ribs 35 for supporting the block, otherwise the ribs 35 are placed before filling with the composite resin material (precursor). May be. After placing the rib 3 5 on the rib placing part 3 2 b, the other half of the saddle (the saddle type) is attached to the lower part 3 1 of the bowl with the concave block forming part 3 2 a and the rib placing part 3 2 b. (Top) 3 3 Cover and fix. A composite resin material is poured into the obtained mold 1 1 from the opening 3 4, and the mold resin 1 1 is filled with the composite resin material.

 The saddle mold 1 1 can be formed from any material. For example, part of the material of the vertical mold 11 may be made of a material that transmits visible light or the like, or all of the material may be made of a material that transmits visible light or the like.

After completing the filling of the composite resin material in the vertical mold 1 1, as shown in Fig. 5, for example, the vertical mold 1 1 is preferably loaded into a rotating and revolving rotary agitator and the composite resin is rotated and revolved. The material is uniformly kneaded. As described in detail above, the present invention resides in a dental prosthesis processing block and a method for manufacturing the same. The present inventors have also invented a method for manufacturing dental prostheses such as crowns and inlays using such blocks or other blocks. This will be described below.

 (Background technology)

 For example, rapid pro- cesses disclosed in Japanese Patent Application Laid-Open Nos. 2-4 6 840, 2 0 0 1-1 5 7 6 8 6 and 2 0 0 2-1 5 6 4 5 1 etc. The production of dental prostheses using a to-type modeling device does not require a mold, and it can reduce the production cost and production time in that a precise prosthesis can be obtained.It is used not only in the dental field but also in various fields. ing.

 The Rabbit Prototype has a further advantage over the conventional method of forming a three-dimensional shape by dot-outputting an adhesive or fluid layer to the powder layer and forming a three-dimensional shape. This is a technique for modeling by laminating a colored resin on a base material and curing it at the same time as the 3D inkjet printer shown in No. 0 publication. A detailed copy model is now formed. It was.

 Such 3D modeling equipment is a 3D CAD software for performing 3D modeling, which creates data and drives these modeling equipment based on a large amount of data. However, handling software requires a certain amount of skill and time, and the skill of the person handling it is necessary.

On the other hand, dental prostheses always require balanced aesthetics at the part that touches the eyes like the front teeth, and various conventional esthetic prostheses have been proposed, but satisfactory esthetic prostheses are Not yet proposed. Therefore, the above-mentioned apparatus that enables control of colorants such as rapid prototypes can be applied, but 3D printing is thick. Therefore, the influence of the reflection / refraction of light is large, and it is necessary to perform complicated aesthetic adjustments considering the thickness as an element, and adjustment with software to obtain a balance with adjacent teeth becomes a difficult task. In addition to the above-mentioned patent documents, conventional techniques in such a field include, for example,

The following patent documents: Japanese Patent Laid-Open No. 2 0 0 7-3 1 4 5 3 9, Japanese Patent Laid-Open No. 2 0 0 4-5 2 0 1 4 2, Japanese Patent Laid-Open No. 2 0 0 7 5 2 9 3 4 8 Publication, International Publication No. 1 9 9 8 Z 3 8 3 7 7 Publication, JP 2 0 0 6 — 3 3

No. 5 0 1 9 can be mentioned.

 (Issue that this invention is trying to solve)

 As described above, the colorant is applied to the three-dimensional object.

6 4 5 1 Although it is also shown in Gazette No. 1, the drive system that moves the nozzles requires the use of 3DCAD software, and is a time-consuming work, because it is a colored modeled object. However, the situational factors such as light reflection are reflected, and it is not always possible to obtain satisfactory aesthetics, and even if time and effort are taken, it is not always possible to achieve satisfactory results.

 (Means for solving problems)

 In view of the above, the present invention is provided with a printing surface obtained by printing colored ink on a transparent or translucent uncolored prosthesis shape surface by a plane moving ink jet printing means for three-dimensional printing. Provide a method for manufacturing dental prostheses. With this manufacturing method, the two-dimensional flat surface software is sufficient for operating the printing means. For example, image plane coloring data for at least four front and back side surfaces (the front teeth may be front and back surfaces) (at least aesthetic) However, it is possible to color the surface of a single prosthesis, which greatly improves handling.

Planar movement type ink jet printing hand for three-dimensional object printing in the present invention For example, commercially available material pudding (Dimatix (trademark) DMP-2831, manufactured by Fuji Film Co., Ltd.), DI RECT-JET (trademark) (manufactured by AIC Corporation), etc. And the aspect comprised by combining the prosthesis placement part which can be rotated by a predetermined rotation angle is shown.

 The present invention is not limited as long as it has a nozzle for ejecting ink, and the ink ejected on the printing surface adheres in a dot-like manner, and this is continuously performed to form, color, and form a pattern. It is intended to indicate things, and is not limited to the above-mentioned general sales pudding.

 In addition, in order to express the color tone through the surface layer to be finally coated, it was determined by forming a color sample with the color after coating changed on the computer screen or by superimposing it with the standard color. If the standard color matches, it may be necessary to convert this standard color to a value obtained by subtracting the surface layer parameters. That is, the adjacent tooth and the standard tooth color such as Vita color are compared. Subtract surface layer parameters from standard tooth color data. The print color is determined from the reduced tone data.

 On the other hand, a color sample through the surface layer is prepared in advance, and the color sample is compared with the adjacent tooth. An approximate color sample is determined, and a virtual color arrangement according to the sample value is performed on the computer.

The determined color sample data is input to the computer and displayed on the screen. Furthermore, it is preferable to add a process of determining ink. For example, the surface layer value, constant, and the measured CMYK value, L *, a *, b * value are determined by calculation such as addition / subtraction / multiplication / division. Also good. The transparent or translucent uncolored prosthesis-shaped surface in the present invention is made of ceramics, hard resin (including hybrid resin, etc.), resin, glass, metal, etc., including silane coupling treatment thereof, etc. A transparent, translucent, uncolored prosthesis that may have a surface treatment, the uncolored prosthesis is a crown with an adjusted shape, preferably for anterior teeth Is shown.

For ceramic _{box, Si0 2, Ti0 2, Zr0} 2, in feldspar, transparent or translucent ceramic box member to control the particle diameter through the grain boundary after the amorphous component or baking is exemplified.

For hard resin, hybrid Doserami Kkusurejin, with MFR c Ivry Tsu Dorejin, as Huy La _{one, Si0 2, Ti0 2, Zr0} 2, feldspar _{Ti0 2 - Si0 2, A 1} 2 0 3 - Si0 2, S i0 ₂ -Ba0-B ₂ 0 ₃ -A 1 ₂ 0 ₃ S i0 ₂ -BaO-B ₂ 0 ₃ -A 1 ₂ 0 ₃ -F, S i0 ₂ -SrO- B ₂ 0 ₃ -A 1 ₂ 0 ₃ , As a resin component, such as glass ceramics such as S i0 ₂ -BaO- SrO- B ₂ 0 ₃ -A 1 ₂ 0 ₃ -F, S i0 ₂ -BaO- Sr0-B ₂ 0 ₃ -A 1 ₂ 0 ₃ Triethylene glycolate emulsion rate, Diurete crepe rate rate, Urethane trim rate rate, Uretantate rate rate, Polyethylene glycol dip rate rate, 1, 6 Xanthdiol Dimethylate, Trimethylol Propanemethacrylate, Benzylmethacrylate, 2-Hydroxyethyl methacrylate, 2—Hydro Xylpropyl methacrylate, dimethylaminoethyl methacrylate, cetylaminoethyl methacrylate, glycidyl methacrylate, tetrahydrofurfuryl methacrylate, ethylene glycol dimethyl methacrylate, 1, 3 — Butylene glycol dimethylate, methyl methacrylate, ethyl methacrylate, n-butyl methacrylate, i_butyl methacrylate, t-butyl methacrylate, 2— Ethylhexyl methacrylate, Cyclohexyl methacrylate, Diethylene glycol dimethacrylate, 2, 2-bis [4- (methacryloxyethoxy) phenyl〗 propane, 2, 2-bis [4 -(Methacryloxydiethoxy) phenyl] propane, 2, 2-bis [4- (methacryloxypolyethoxy) Polymerization component) such as phenyl] propane, other photosensitizer, as the heat sensitizer, Kanfakino down, dibenzyl § cetyl, benzyl dimethyl Ke evening , Benzyljetyl ketal, benzyldi (2—methoxychel), 4,4′-dimethylbenzyl-dimethylketyl, anthraquinone, 1—black anthraquinone, 2_black mouth Anthraquinone, 1,2—Benzanthraquinone, 1—Hydroxylanthraquinone, 1—Methylanthraquinone, 2—Ethylanthraquinone, 1 Monobromoanthraquinone, Thioxanthone, 2—Isopropylthixanthone, 2—Ditrothioxane T, 2 —methylthioxanthone, 2,4 monodimethylthioxanthone, 2,4 monojetylthioxanthone, 2,4 —diisopropylthioxanthone, 2_black mouth—7—trifluoromethylthioxanthone, Thixanthone 1 0, 1 0 — Dioxide, Thixanthone 1 0 0 — Oxide , Benzomethyl ether, benzoin ether, isopropyl ether, benzoin isobutyl ether, benzophenone, bis (4-dimethylaminophenol) ketone, 4,4'-bisjetylaminobenzophenone, derivatives of acylphosphine oxide, azide Examples thereof include compounds containing a group, and these can be used alone or in combination. As the reducing agent, tertiary amine is generally used. Tertiary amines include N, N-dimethyl_p-toluidine, N, N-dimethylaminoethyl methacrylate, triethanolamine, 4-dimethylmethylaminobenzoate, 4-dimethylaminobenzoate. Examples thereof include ethyl acid and isoamyl dimethylaminobenzoate. Further, as other reducing agents, benzoyl peroxide, azobisisoptyronitrile, sodium sulfinate derivatives, organometallic compounds, etc. are used, and an unprocessed product block is provided. Transparency can be controlled because the refractive index can be easily adjusted by the blending ratio of these individual components by using glass ceramics with two or more components as a filler and copolymers with two or more components as resin components. . Obtaining color information from the measurement object

 The imaging of the abutment tooth SH and the adjacent teeth RH 1 and RH 2 in the oral cavity shown in FIG. 16 is preferably performed under appropriate lighting. For example, a ring strobe, a box strobe, a cold cathode Examples include panel lights such as tubes, halogen lamps, LEDs, and organic EL.

 The shade guide used in the present invention includes, for example, a dental colorimeter shade eye N CC, a dental color marker N CC shade guide, a VITA glassical shade guide, and a VITA 3D MASTER.

 The acquisition of color information from neighboring teeth in the present invention includes, for example, a method of analyzing RGB values and C MYK values from a digital camera photographing overnight, and determining a tooth color according to the analysis values, The method of determining the tooth color by complementing the other one or several points of the adjacent teeth is exemplified.

 Using a colorimetric type that applies white light to a natural tooth and analyzes the reflected light, or a colorimeter that analyzes the reflected light by applying a monochromatic light that has been pre-spectrized to the natural tooth, RGB value, C MYK The print data may be generated based on the method of analyzing the value and determining the tooth color according to the analyzed value, and the multiple color shade mapping of the entire tooth. After the color measurement, the design of the tooth to be created includes natural tooth-like images such as a method of correcting and processing a tooth photo image with the color measurement of the tooth — processing in the evening, and incorporating a texture design created in advance. Print with the design.

Obtaining contour information from the measurement object

The object to be measured is obtained from the shape of the adjacent teeth, abutment teeth, and counter teeth, such as the margin line, maximum ridge, and occlusal surface. Examples of methods for obtaining contour data from this method, methods for forming convex models on concave models obtained from adjacent teeth and abutment teeth, and measuring contour surfaces of the convex models to obtain contour information, etc. Is done. Oil-based ink used in the present invention

 In the present invention, oil-based ink is suitably used as a hybrid resin, other resin for dental prosthesis, and printing on the ceramic surface, which is difficult to peel off and provides aesthetics. There is also a UV ink jet printing method, but the ink is mainly composed of a high-viscosity polymerizable material, and the ink itself has no volume shrinkage that volatilizes, resulting in unevenness and print streaking. This is not aesthetically pleasing because of problems such as generation and loss of gloss. On the other hand, in the case of solvent-based inks, solvents with low viscosity of volatile components such as ethanol occupy most of the components, and because the viscosity is low, the dot spreads and the solvent volatilizes, so ink with high colorant concentration Can be printed on the base material with as little as possible and reduced unevenness, resulting in aesthetic drawing. Fillers can be mixed into the ink, and the solvent concentration evaporates after printing even at low filler concentrations during ink preparation, increasing the filler concentration and improving wear resistance.

The components of oil-based inks include, for example, colorants: oil-based dyes (Sudan π, Kinizarin Green SS, Orange SS, Sudumble I B, Oren Giraud X〇, Kino Rin Yellow SS, C 1.5 BK_3, CI. 5 BK—7, C 1.5 BK— 4 9) 1 to 5%, oil-based pigment (condensed azo type, Pigment Yellow 74, 93, 128, magenta quinacridone type Pigment red 122, 19, Pigment blue 15 : 3, 15: 4, Pigment black 7, in the range of 1 to 10%, preferably because it is an ink used in the mouth, iron oxide (red, yellow), titanium oxide (white ) Hydrophobized iron oxide or titanium oxide, Solvents include volatile monomers such as MMA, ME K or alcohols, or alcohol / acetone 80 to 95% natural resin (rosin, shellac) , Synthetic resin (acrylic resin, vinyl resin), oil as other resin components Sexual habit , Dry oil alkyd resin, moisture curable urethane, melamine resin, acrylic melamine resin, polyester melamine resin, latex 1-5%, other conductivity modifier 0-2%, dispersing agent 0-10% Examples include the initiator camphorquinone, DMAEMA, fluorescent agent LUMILUX, and dispersing agents (sorby fatty acid ester, lecithin, etc.).

 As a method for producing this oil-based ink, when a pigment is used as a coloring material, the average particle size of the pigment dispersed in the solvent is 0.1 to 0.4 m. It is preferable from the relationship with the dispersion stability. Therefore, if necessary, a method of pulverizing by a pulverization or synthesis method, for example, preparing by a bead mill as a dispersion process, or a method of preparing by an ultrasonic wave is shown. In addition, when using a dye as a coloring material, an ink is prepared by dissolving the dye in a solvent with a stirrer such as a rotation revolving stirrer or a planetary mixer.

 The ink composition of the present invention forms a film by increasing the concentration of the fixing resin and the reaction base material by volatilizing the solvent. In order to improve the film strength, it is preferable to incorporate a ceramic filler in which the fixing resin containing the pigment and the reaction base material are covalently bonded to the printing surface. In the case of a resin, it is polymerized and bonded with a fixing resin or reaction substrate having double bonds remaining on the printing surface and double bonds. Alternatively, an amino group or a hydroxyl group may be introduced into the printing surface in advance and reacted with a fixing resin or reaction substrate having an isocyanate group or an epoxide group after printing. Further, even when the ceramic is a printing surface, a similar bonding form can be formed by using a surface treatment, and it may be baked and bonded to the periphery of the pigment.

Furthermore, it is preferable to coat the printed surface with a coating agent for protection. These means improve solvent resistance, water resistance, wear resistance, etc., and can prevent the ink coloring material from flowing out. It can withstand mechanical loads such as brushing and harsh oral environments such as acidity and high humidity.

 In the present invention, the “component having a reactive functional group that causes polymerization to occur in the fixing resin component” includes a urethane resin having two or more isocyanate groups and a hard segment, such as TE-2200 (quotient). Standard) (manufactured by Nippon Soda Co., Ltd.) and when there is a monomer having two or more methacrylate groups in which the thermoplastic segment of methyl methacrylate is present as a block or graph polymer. Illustrated.

Formation of surface layer

 The present invention forms a further transparent surface layer after printing. The surface layer is finally cured by ultraviolet rays, visible light, heat, or the like to prevent peeling of the printed surface and to improve the aesthetics of oil-based ink printing.

 After the printing, the surface layer is further printed with an ink containing the above-described components, or dipped in a solution containing the above-described components, dried, spray-coated, applied, and coated.

 Finally, photocuring and thermosetting are performed, and the printed surface is fixed to the tooth surface.

 In addition, the surface layer affects aesthetics and gives gloss to rough surfaces such as cutting marks, and also provides color buffering such as depth and blurring of the printing boundary layer, and light reflection. In some cases, the surface layer is preferably used in the present invention.

The surface layer preferably contains a filler such as glass ceramics in order to improve wear resistance against occlusion and brushing. In that case, the refractive index of the filler and the polymer are matched, but it is difficult to achieve complete transparency. Therefore, the shade may change depending on the thickness of the surface layer, and it is necessary to control the thickness of the surface layer with uniformity and reproducibility. The As a coating method, inkjet printing is preferable to immersion. At this time, the ink composition is also important for enabling uniform application, and the shape and size of the filler and the surface layer are preferably chemically bonded to the printing surface and the prosthesis to be printed. A dispersing agent may be used to stabilize the dispersion of the filler.

 Table A below shows an example of the composition of the surface layer.

 Table A

(The invention's effect)

According to the present invention, the surface of the processed prosthesis by the plane moving type inkjet printing means for printing a three-dimensional object is printed based on the plane data. Since it is easy to make adjustments and 2D data can be used, a simple esthetic prosthesis can be manufactured.

 Especially for coloring the tooth surface that is a spherical surface close to a flat surface, such as the front teeth, 2D printing for 3D object printing is a color that allows various color adjustments without a sense of incompatibility. / A small dot shape with a diameter of m and discharge in picolitor order, so it is not easily affected by dripping, and even on curved surfaces, it has excellent aesthetic coloring. By forming a surface layer, it may be possible to achieve a color appearance and depth close to a natural tooth with a three-dimensional appearance along the shape of the three-dimensional object.

 Oil-based inks can be applied thinner than water-based inks, and are also suitable for color verification by repeated coating, etc. without considering permeability, and for color comparison on a PC monitor.

 When water-based ink is used, it is the principle of printing by penetrating it into a binder layer or the like, but since the resin or ceramic to be printed is a non-permeable material, a binder layer must be formed. Therefore, the water-based ink has one step more than the oil-based ink, and the shape of the prosthesis varies depending on the patient. Therefore, the water-based ink is processed at a small edge that forms a binder layer after the prosthesis is molded, resulting in poor productivity.

 (Mode for carrying out the invention)

 The present invention is a method for producing a two-dimensional coloring device using general-purpose software and printing the data for two-dimensional coloring, such as DI RECT-JET (trademark) (manufactured by AIC Co., Ltd.). By painting and coloring the unpainted prosthesis on the mounting part using the plane-moving inkjet printing means for printing, it is possible to manufacture a dental prosthesis with excellent aesthetics.

Print so that the base of the oil-based ink is white, and then print the desired tooth color. Printing should be made of two or more layers in front of the front teeth It is preferable that the back side may be one or more layers.

 After printing, a surface layer is formed by coating with a transparent resin, and this is polymerized and cured by light and heat to protect the printed surface and prevent peeling.

A prosthesis with strength is obtained.

 In addition, since general-purpose software is used, the computer's processing time is small, so the color scheme can be adjusted any number of times.

 Color information is input using general-purpose software. General-purpose software can input color information at least. Any software that can output a virtual color scheme based on this color information may be used, and in some cases, a dedicated software may be used.

 Color information includes primary color values represented by RGB and CMYK values, color data corresponding to these values, shade numbers and color data corresponding to shade numbers, and other combinations of codes assigned to each color data. The color data corresponding to the comparison value obtained from the comparison data on the PC monitor screen is shown.

 Including such a coloring process, it is preferable to automatize the series of processes from the previous uncut prosthetic cutting process using an industrial robot.

 In addition, the color information may be determined by monitoring adjacent teeth adjacent to the prosthetic site, and it is preferable to color the surface of the prosthesis based on the measurement data. Here, the monitor's method uses a color measuring device such as a digital camera, video, and colorimeter to determine the color data of adjacent teeth.

This color data is loaded on a personal computer and compared with a pre-recorded database. The ratio of ink used to paint the color data that has been approximated, matched, or predicted matched is adjusted. The printing ink overnight is formed. On the other hand, the contour data of the prosthesis, the abutment tooth measurement data that determines the margin line of the prosthesis, the adjacent tooth shape that determines the maximum ridge data of the prosthesis, the tooth height value, the tooth width value, etc. It can be obtained by measuring with the wax upless method determined from the data and converting it to digital data, or by forming a model of the prosthesis in advance and measuring the surface to make it digital.

 The contour data is displayed on the monitor and colored. In some cases, the display on the monitor is displayed as 3D data, but in the present invention, it is sufficient to display the data on a flat screen.

 Color is arranged on the contour data displayed as plane data based on the color information determined by visual inspection. After the color scheme is completed for the contour data, the contour data for the back and left and right side surfaces of the prosthesis is displayed on the monitor and colored as necessary.

 The color values are adjusted so that each color information or final value is a value that passes through the surface layer. That is, the surface layer is preferably transparent, but translucent may be selected, and even if it is transparent, the appearance differs depending on the amount of catadioptric refraction with respect to the illumination light depending on the thickness. The comparison with the measured color tone is determined in consideration of the surface layer value.

 In the present invention, since the front teeth are mainly colored, the front surface of the prosthesis is mainly colored, and the other surfaces may be painted with the existing tooth color, and the block already has such a color scheme. If so, it may not color.

 The unpainted prosthesis is processed by cutting or grinding a block made of ceramics, hybrid resin, etc., made of a transparent or translucent material.

An example of the production method is shown in, for example, Japanese Patent Application Laid-Open No. 2 0 0 8 — 1 5 9 5 7 3. Examples in which the proposed method is preferably used

 The present invention will be described in more detail with reference to examples and experimental examples. The present invention is not limited to the following examples and experimental examples.

Example 1

 In this example, the vertical prosthesis shown in FIGS. 1 and 2 is used to manufacture a dental prosthesis processing block.

 To implement this example, prepare a saddle type. As shown in FIG. 1 (a), the saddle mold 1 1 prepared in this example has a connecting part 1 0 1 of the rib 10 (inserted into the saddle 1 1 as indicated by an arrow in the figure). It has a lower rib through-hole 1 1, a central block forming portion lib, and an upper opening 1 1 a, through which insertion is made. The block forming portion l i b defines the outer shape of the block. Therefore, the inner surface shape of the saddle type 11 corresponds to the outer surface shape of the block. The opening 11 a is an opening used to inject the composite resin material and irradiate the composite resin material with visible light or the like for photopolymerization. In the example shown in the figure, the opening 1 1 a is formed larger than the diameter of the block forming portion 1 lb, and a plurality of saddles 1 1 are stacked to allow simultaneous use of a plurality of saddles 1 1. Is getting better too.

In this example, the saddle 11 can be formed from any material. For example, the vertical type 1 1 is a resin such as polyacetal, polycarbonate, polystyrene, polyethylene, polyethylene terephthalate, polypropylene, Teflon (registered trademark), or aluminum, titanium, brass, iron, stainless steel, feldspar, zirconia, etc. Made of ceramics, metal materials, rubber such as silicone, urethane, etc. can do. When rubber such as silicone is used as the mold 11, the mold itself can be deformed, so that the hardened block can be easily taken out. In addition, retention of airtightness with the rib part can be obtained by the shape of the rib.

 The rib 10 for supporting the block can be made of any material. For example, the material of the rib 10 is brass, alumina, polyacetal, polycarbonate, polystyrene, polyethylene, polyethylene terephthalate, polypropylene, Teflon (registered trademark) resin, or aluminum, titanium, brass, iron, stainless steel, Examples thereof include ceramics such as feldspar and zirconia, metals, and the like. Since the rib 10 can support the block therewith, for example, a mounting tool for placing the block on the machine tool can be formed.

 A preferred example of the rib 10 is shown in FIG. FIG. 8A is a front view of the rib 10, and FIG. 8B is a cross-sectional view illustrating a state where the rib 10 is attached to the saddle shape 11.

 In FIG. 8 (a), the connecting portion 10 1 for connecting the rib 10 to a processing machine (not shown) is formed of a metal material such as cylindrical brass or aluminum. An embedding portion 10 2 to be embedded in the block is provided on the upper portion of the rib 10, and is formed in a columnar shape having a larger diameter than the connection portion 10 1. In addition, the upper part of the rib 10 is provided with a concave part 10 3 continuous around the embedding part 10 2, the composite resin material enters, and after the composite resin material is cured, the rib 10 and the block are An anchor effect that does not leave is obtained. The width of the recess 10 3 is usually 1 mm or less. If necessary, a plurality of recesses 10 3 may be formed in the rib 10.

Fig. 8 (b) shows a state in which the rib 10 is accommodated in the vertical saddle 11. Show. Since the buried part 10 2 has a larger diameter than the connecting part 1 0 1, the rib 1 0 does not fall from the bowl 1 1, and it is sufficient to simply pass it through the rib through-hole 1 1 c, Even when taking out the block after curing, it is easy to handle because the block can be detached from the mold 11 by simply pressing the connecting part 10 1 of the rib 10.

 First, as shown in FIG. 1 (b), the rib 10 is inserted into the rib through hole 11 c. The connection portion 10 01 of the rib 10 shown in FIG. 6 (a) stays in the rib through hole 11 c.

 Next, as shown in FIG. 1 (c), in the state of FIG. 1 (b), for example, composite resin material (precured precursor) 1 7 c shown in Experimental Example 1 (Table 1) 2 Inject into bowl 1 1 at a height of ~ 3 cm. This height is based on the degree to which photopolymerization due to irradiation with visible light or the like is sufficiently generated, and may be higher depending on the irradiation ability of visible light.

 Here, it is preferable that the composite resin material to be used has already been sufficiently mixed in a state where the inorganic filler and the resin are mixed. Such mixing is preferably performed, for example, by kneading in advance in a vacuum environment by a mixing method using a rotating stirrer that rotates and revolves. The rotary stirring device is preferably the same as the rotary stirring device used in the subsequent rotary stirring treatment step.

 After filling the composite resin material 17 c into the mold 11, perform the rotary stirring process with the rotary stirrer. The rotary agitation treatment can be advantageously carried out by the rotary agitation apparatus shown in FIG. 2 by rotating agitation and rotation for about 1 minute to 2 hours.

Fig. 2 shows an example of rotational agitation by combined rotation. In this example, the vertical mold 1 1 filled with the mixed resin agent 17 c shown in FIG. 1 (c) is rotated with a predetermined inclination, for example, counterclockwise around the central axis O 2, and Rotation around the central axis 〇 1 around the center R 1 and its combined rotation Stir with force.

 As the illustrated rotary stirring device, for example, a mixer that performs rotation and revolution described in Japanese Utility Model Laid-Open No. 3-3 6 6 1 3 described above can be suitably used. Here, the rotation speed of rotation and revolution can be arbitrarily changed. As an example, the rotation speed of rotation is exemplified as 6 00 to 2 0 00 r pm, and the rotation speed of revolution is exemplified as 3 0 0 to 1 0 0 0 r pm. By maintaining such complex rotation for 60 to 100 seconds, even when a resin having a high viscosity is used, it is possible to achieve a uniform mixing of the inorganic reinforcing agent and the resin. In addition, this rotary stirring can sufficiently knead even a cocoon-like resin having a high viscosity.

 After the kneading of the composite resin material 17 c, the visible light etc. is irradiated from the opening 1 1 a of the vertical mold 1 1 for about 10 seconds to 24 hours to photopolymerize and cure the composite resin material 17 c. I do.

 After the photopolymerization and curing of the composite resin material 1 7 c is completed as described above, the composite resin material 1 7 b is formed into a vertical mold 1 1 at a height of 2 to 3 cm as shown in Fig. 1 (d). Then, the mixture is kneaded by rotation and revolution for 1 minute to 2 hours using the rotary stirring device shown in FIG. Thereafter, visible light or the like is irradiated from the opening 11a for 10 seconds to 24 hours to photopolymerize and cure the composite resin material 17b.

 Subsequently, as shown in FIG. 1 (e), the composite resin material 17a is supplied, and is kneaded for 60 seconds to 3 hours by a rotary stirrer. Irradiate from 10 seconds to 24 hours from a to photopolymerize and cure the composite resin material 17 a. In this way, by repeating the filling and photopolymerization curing processes, the block-shaped composite resin material (1 7 a, 1 7 b) filled in the block forming portion 1 1 b of the vertical mold 1 1 is filled. And 1 7 c) can be obtained.

Finally, in the state shown in Fig. 1 (e), composite resin material (1 7a, 1 7 b and 17 c) are heated at 100 to 200 and thermally polymerized to be completely cured. The resulting composite resin block 13 is shown in FIG. FIG. 3 (a) is a front view of the composite resin block 13, and FIG. 3 (b) is a perspective view of the composite resin block 13. As shown in the figure, ribs 10 are fixed to the composite resin block 13.

 The composite resin block 13 produced in this example is obtained by dividing the same composite resin material into a plurality of pieces, filling each of them into a mold 11, and kneading and curing. As materials, materials having different compositions from each other and materials having different colors (color, color tone, etc.) may be selected, filled into the mold 11 and laminated. In addition, although the number of times of lamination is shown in FIG. 1 as an example of 3 times, it is naturally not limited to 3 times, but may be 2 times, 3 times or more, for example, 6 times, It may be 9 times. For example, when producing a gradation block obtained by the number of times of lamination of about 6 times, the obtained color gradient may be preferable.

 Figure 1 (f) shows a variation of the above example. In other words, this example shows a case where the composite resin material 17 is filled into the mold 1 1 at a time, kneaded and cured. Such a method is a suitable method when using a saddle type that has sufficient irradiation ability such as visible light and has transmission ability such as visible light.

 The vertical shape shown in FIGS. 1 and 2 and described above is a vertical vertical shape, and has the advantage that more block forming portions can be manufactured in a narrow space. This is shown in the perspective view of FIG. As shown in the figure, the saddle type is vertically long, but a lot of blocks can be formed simultaneously in a narrow space.

In the cylindrical bowl 60, four block forming parts 61b shown in Fig. 1 are formed. Each block forming part 6 1 b A rib through hole 61c is formed in the lower part. Further, a lid placing part 61a is provided on the upper part of the bowl 60. The lid placing portion 61a is not shown, but has a recess that can be further overlapped with saddles of the same shape and size. Thus, it is possible to produce a configuration in which a plurality of blocks can be manufactured in a small bowl shape, and there is an effect that more blocks can be manufactured even if the size of the rotary stirring device is limited.

Example 2

 In this example, the horizontal prosthesis shown in FIGS. 4 and 5 is used to manufacture a dental prosthesis processing block. In the case of this example, the composite resin material is filled into a bowl shape, kneaded with a rotating / revolving rotary stirrer, and further polymerized and cured, the series of steps repeated, the last polymerization It is understood that the process of manufacturing a molded block composed of a composite resin block and ribs cured by curing and other related processes can be performed according to the method described in Example 1 unless otherwise specified. I want. To implement this example, prepare a saddle type. The saddle mold 1 1 prepared in this example has a saddle lower part 3 1 and a saddle upper part 3 3 as shown in FIG. 4 (a). An opening 3 4 is formed in the bowl-shaped upper portion 3 3. The opening 34 is open even during the rotary stirring process. The shape of the inner surface formed by overlapping the saddle lower 3 1 and the saddle upper is a space having a block outer shape, that is, the block forming portion 3 2 a. The saddle mold 11 is formed of the same material as the saddle mold described in the first embodiment, but preferably a visible light transmission material is used.

A rib 3 5 having a notch 3 5 a is placed on the vertical mold 1 1. The notch 3 5 a, like the recess 10 0 3 of the rib 10 shown in Fig. 8 (a), has an anchor effect so that the composite resin material enters and the rib and the block are not separated. Can do. Rib 3 5 is also the same as vertical 1 1 Further, it is formed of the same material as the rib described in the first embodiment described above. The vertical mold 1 1 is composed of the opening 3 4 with the rib 3 5 mounted on the rib mounting section 3 2 b of the vertical lower section 3 1 and the vertical upper section 3 3 mounted thereon. Used by supplying resin material.

 First, as shown in FIG. 4 (b), the composite resin material 40 a is filled into the vertical mold 1 1 from the opening 34 so as to have a thickness of 2 to 3 cm. Next, while maintaining this state, as shown in FIG. 5, under a vacuum, by means of a rotating stirrer, rotation R 2 centered on shaft 02 and revolution R 1 centered on shaft 01, The composite resin material 40 a is kneaded and stirred and degassed in the same manner. As shown in the figure, the rotary stirring device rotates R 2 counterclockwise around the axis 02 and performs clockwise revolution R 1 around the axis 0 1.

 After the rotary stirring treatment is completed as described above, the first cured layer 40 0 of the composite resin material is obtained by irradiating the composite resin material 40 a with visible light or the like by the same method as described above and performing polymerization curing. Form a.

 Next, as shown in FIG. 4 (c), the composite resin material 40 b is further filled in the mold 11 with a thickness of 2 to 3 cm from above the cured layer 40 a, and the cured layer 4 a is first filled. The same rotary agitation process and subsequent polymerization hardening process as those carried out for the formation of the above are repeated. In other words, rotating agitation is performed by rotation and revolution as shown in Fig. 5, and irradiation with visible light or the like is performed. By performing polymerization and curing, the second cured layer 40 b of the composite resin material is formed.

 Next, again, the composite resin material 40 c is further filled into the vertical mold 11 with a thickness of 2 to 3 cm from above the hardened layer 40 b, and the same rotary agitation treatment as described above, followed by irradiation with visible light, etc. I do. By performing polymerization and curing, a third cured layer 40 c of the composite resin material is formed.

Furthermore, the above-mentioned method carried out to form the first to third hardened layers is repeated, and as shown in FIG. Furthermore, the fourth to sixth hardened layers 40 c on the first to third hardened layers 40 a to 40 c already formed in the part 3 2 a! Laminate up to 40 f After repeating the filling of the composite resin material, the rotation stirring treatment and the polymerization and curing as described above, and filling the inside of the mold with the cured composite resin material, the composite resin material is 1 4 0 Polymerization is carried out by heating at a temperature of about 1 to 50 at a temperature before and after 1 20 to 3 60 minutes. As a result of heat polymerization, the entire composite resin material is completely cured. After the composite resin material is cured, the molded block made of the composite resin block 4 3 and the rib 35 made of a laminate of the cured layers shown in FIG. 6 is taken out by pushing the rib toward the vertical opening. In the resulting molded block, the block color is made different so that a molded block with gradation parallel to the rib major axis is formed. Example 3

 In this example, as shown in FIG. 9, a block for dental prosthesis processing is manufactured by using a vertical saddle shape together with a partition member (partition). In other words, in the case of a horizontal saddle, it is easy because a gradient block is formed by simply laminating, but for example, even with a vertical saddle as used in Example 1 above, By using a partition together, a similar gradation block can be formed. In the case of this example, the composite resin material is filled in a bowl shape, kneaded with a rotating / revolving rotary stirrer, and further polymerized and cured, the process of repeating the series of processes, the last Unless otherwise specified, the process for producing a molded block composed of a composite resin block and a rib cured by polymerization curing and other related processes can be carried out according to the method described in Example 1 above. I want you to understand.

To implement this example, prepare a saddle type. The saddle type 1 1 prepared in this example is the top view of the saddle type 1 1 in Fig. 5 (a) and the line segment in Fig. 5 (a). As shown in Fig. 5 (b), which is a cross-sectional view along X-X ', it is a saddle 11 similar to that described above with reference to Fig. 1, except that the opening 1 1a Insert partition 1 2 via, and attach to vertical 1 1. The partition 1 2 can be made of the same material as the mold 1 1. The partition 1 2 can be formed in any shape, but from the viewpoint of forming a gradient block, a U-shape or similar shape is recommended. By interposing the partition 12 in the block forming portion 1 1 b, it becomes possible to insert an irradiation member such as visible light, a reflection member, or the like into the formed gap. In the figure, an example is shown in which the partition 12 is arranged at the upper end of the rib 10 attached to the saddle 11, but other arrangements may be adopted as necessary.

 In this example, as shown in FIG. 9 (b), three spaces (gap) are formed in the block forming portion 1 1 b of the saddle-shaped 11 1 by arranging the partitions 1 2. Next, as shown in FIG. 9 (c), the composite resin materials 18a and 18b are filled in the gaps on both sides of the partition 1 2 and rotated according to the method described above in the first embodiment. Stir processing and irradiate with visible light. Irradiation with visible light or the like is preferably carried out by forming at least the side surface of the mold 11 from a member that can transmit visible light or the like. The cured composite resin layers 1 8 a and 1 8 b are formed by polymerization by irradiation with visible light or the like. According to another method, the composite resin material 1 8 a or 1 8 b is filled in the gap on one side of the part 1 2, either by rotating stirring treatment and irradiation with visible light or the like. The composite resin material may be cured, then the remaining composite resin material may be filled in the other gap, and the remaining composite resin material may be cured by the same rotational stirring treatment and irradiation with visible light or the like.

After forming the cured composite resin layers 1 8 a and 1 8 b, Remove 1 2. In this way, a new gap is formed between the composite resin layers 18 a and 18 b, and this gap is filled with the composite resin material 18 c as shown in FIG. 9 (d). After filling with the composite resin material 18 c, a rotary stirring process is performed by the same method as described above, and then UV is irradiated from the side surface and the upper surface of the vertical mold 11 to polymerize and cure it. As illustrated, a cured resin layer 18 c is formed.

 As can be seen from the figure, in this example, a composite resin block made of a laminate of cured resin layers 18 a, 18 b, and 18 c and a molded block made of ribs are taken out from the mold 11. In the obtained molding block, the molding block having a gradient parallel to the rib major axis is formed by varying the color scheme of the block.

 In this example, the composite resin material filled in the gaps on both sides of the partition was cured with the center of the vertical block forming part as a gap, but depending on the shape of the partition used Vice versa. That is, after placing a partition that supplies and cures the composite resin material in the center of the bowl and first forms an intermediate layer (cured resin layer), the composite resin material is formed in the gaps on both sides of the partition. And may be further subjected to a rotation stirring process, a process of irradiation with visible light, or the like.

 This example can be further modified. For example, in the above example, the vertical shape is shown to be formed of a material that transmits visible light or the like. However, even in the case of a vertical shape that is formed of a material that does not transmit visible light or the like, a similar molding block is used. Can be manufactured.

For example, in the state shown in FIG. 9 (b), the partition 12 is formed of a member that transmits visible light or the like, and the gap formed inside the partition 12 is inserted into the gap. A means that can irradiate visible light etc. is arranged. In this state, as shown in FIG. 9 (d), the composite resin materials 1 8 a and 1 8 b are filled, and these composite resin materials are treated in the same manner as described above. Polymerize and cure. After polymerization hardening of the composite resin material, the partition 12 is pulled apart, and the composite resin material 18 c is supplied to the gap formed there. After the rotary stirring treatment, visible light or the like is irradiated from above the composite resin material 18 c. By such a process, a gradation block can be manufactured without forming a saddle shape from a special material.

Example 4

 In this example, when a vertical prosthesis block is used to manufacture a dental prosthesis processing block, a plurality of cured resin layers that are members of the block are not formed from composite resin materials, but at least. An example of manufacturing a molded block using a part of the cured resin layer (herein called “block piece”) that has already been formed will be described with reference to FIGS. 10 to 14. To do. That is, in this example, when forming a molding block according to a certain manufacturing process, at least a part of the cured resin layer constituting the block, the present invention may be followed at another place (manufacturing site) or other than the present invention. A molded block is manufactured using a block piece made of a composite resin material according to the method. In the case of this example, the composite resin material is filled into a bowl shape, kneaded with a rotating / revolving rotary stirrer, and further polymerized and cured, or a series of processes repeated, or the final polymerization. Understand that the process of manufacturing a molded block consisting of a composite resin block and ribs cured by curing and other related processes can be performed according to the method described in Example 1 unless otherwise specified. I want to be done.

In this example, the molding block 8 7 is manufactured by the manufacturing method shown in order in FIGS. 13 (a) to 13 (f). Here, instead of the composite resin material as a starting member, as shown in FIG. 10, the cured resin layer 8 2 (block piece A) and the cured resin layer 8 4 (block B) are connected to the support container 8 3 and Used for both. The cured resin layer 8 2 (block piece A) is shown in Fig. 11. Thus, each of the cured resin layers 8 4 (Plock B) is manufactured as shown in FIG.

 In carrying out this example, a support container 83 shown in FIG. 10 (a) is prepared. The support container 83 is a transparent or translucent container made of silicone resin, polyethylene terephthalate (PET), etc., and its inner surface shape corresponds to the outer surface shape of the target block, and the block forming part 8 3 b constitutes. The outer shape of the support container 8 3 is such that the support container 8 3 can be inscribed in the vertical mold 1 1, and an opening 8 3 a for inserting the block pieces A and B is provided in the upper part. In addition, a rib insertion hole 83c is provided on the bottom surface.

 The cured resin layer 8 2 (block piece A) is formed in advance, and is formed in an L shape as shown in Fig. 10 (b), and ribs 8 1 are formed in the portion extending in the lateral direction. Are joined. The cured resin layer 8 4 (block piece B) is formed in advance in the same manner as the block piece A, and has a rectangular shape as shown in FIG. 10 (c). The cured resin layer 8 2 (block piece A) and the cured resin layer 8 4 (block B) are each manufactured from a composite resin material, for example, in the following manner, for example, according to the method described in Example 1.

Manufacture of Block A

As shown in FIG. 11, the block piece A (8 2) is manufactured using a vertical saddle 21 having a block forming portion 2 lb. First, as shown in Fig. 11 (a), the mold A (91) and the rib 81 are inserted into the vertical bowl 21 and attached. Next, as shown in FIG. 11 (b), the composite resin material 8 2 is injected into the gap between the block forming portions 2 lb and filled. After filling with the composite resin material 8 2, the mixture is stirred with a rotating stirrer by the method described in Example 1 and irradiated with blue visible light to be cured. At that time, in order to adjust the degree of curing, it is preferable to set the curing time to the usual 20 to 100%. . After the curing is completed, as shown in FIGS. 10 (b) and 11 (c), the block piece A (8 2) joined to the rib 8 1 is taken out from the mold 2 1. Manufacture of block piece B

 As shown in FIG. 12, the block piece B (8 4) is manufactured using a vertical saddle shape 2 1 having a block forming portion 2 1 b. First, as shown in FIG. 12 (a), the mold B (93) is inserted into the vertical bowl 21 and attached. Next, as shown in FIG. 1 2 (b), a composite resin material 84 is injected into the gap between the block forming portions 2 1 b and filled. After filling with the composite resin material 8 4, the mixture is stirred with a rotary stirrer according to the method described in Example 1, and irradiated with blue visible light to be cured. At that time, in order to adjust the degree of curing, it is preferable to set the curing time to the usual 20 to 100%, similarly to the block piece A (82). After the completion of curing, as shown in FIGS. 10 (c) and 12 (c), a rectangular block piece B (8 4) having a desired shape is taken out from the mold 2 1.

Manufacture of molded blocks 8 7

 Subsequently, using the block piece A (8 2) shown in Fig. 11 and the block piece B (8 4) shown in Fig. 12, a molding block 8 7 is manufactured by the method shown in order in Fig. 13. To do. Since this example is an example, various changes and improvements can be made.

First, as shown in FIG. 1 3 (a), the rib 8 1 and the block forming part (space) 8 3 b of the support container 8 3 are connected to the rib 8 1 through the opening 8 3 a of the support container 8 3. Install the connected block piece A (8 2). The rib 8 1 is inserted into the rib insertion hole 8 3 c of the support container 8 3 and is stably fixed. Next, as shown in FIG. 13 (b), the block piece B (8 4) is mounted on the support container 83 having already been mounted with the block piece A (8 2). The block piece A (8 2) and the block piece B (8 4) are arranged in a state in which the block piece A (8 2) and the block piece B (8 4) are fitted to the inside of the support container 83, leaving a space in part. After the mounting of the block piece A (8 2) and the block piece B (8 4) is completed, as shown in FIG. 13 (c), the support container 83 is inserted into the vertical mold 11 as it is. In this state, as shown in FIG. 13 (d), the composite resin material 8 6 is supplied to the space left in the center of the support container 8 3, and the rotary stirrer is used by the method described in Example 1. Rotate with. In this case, the composite resin material 8 6 has a small diameter at the filling point, and if sufficient defoaming and filling cannot be obtained with a high-viscosity composite resin material, 5 mPa · s from liquid to soft paste It preferably has a viscosity of ˜100 Pa · s.

 After the rotary stirring process, the composite resin material 86 is cured by irradiating it with blue visible light. At that time, it is preferable to irradiate light for 10 minutes to 1 hour in order to perform sufficient polymerization. In this example, since the support container 83 is transparent or translucent, the curing light beam is irradiated to the entire composite resin material, so that sufficient polymerization can be performed in a short time. The cured composite resin material 86 is called Plock C in this example.

 Subsequently, the support container 8 3 is taken out from the vertical mold 1 1. Fig. 13 (e) shows the state in which the support container 8 3 is taken out from the vertical mold 11 1 with the composite resin material laminate (integrated block A, B and C) put in it. Subsequently, the support container 83 is removed, and the laminated body of the composite resin material is heated at a temperature of 140 to 160 for 2 to 3 hours to perform thermal polymerization. In this way, a molding block 8 7 shown in FIG. 13 (f) is obtained. As shown in the figure, the molding block 87 is made of an integrated body of a block A (82), a block B (84), and a block C (86), and ribs 81 g are embedded therein.

The manufacturing method of the molding block 87 shown in Fig. 10 to Fig. 13 is suitable for the manufacture of a gradient block in which the color of the block has a gradient. In addition, the obtained block has sufficient strength.

 The following blending example is a blending example of each block piece when making a gradient block.

Block piece A (8 2):

 Silica (0.1-5 m diameter) 76w / w%, Silica (10 ~: LOO nm diameter) 2w / w%, TEGDMA llw / w%, UDMA llw / w%, Camphorquinone 0.02w / w%, N , N-dimethylaminoethyl methacrylate 0.02w / w¾, benzoyl peroxide: 0.02w / w¾

 (Red iron sesquioxide 0.0011w / w%, yellow iron sesquioxide 0.011w / w¾, white titanium dioxide 0.039w / w%)

Block piece B (8 4):

 Daraday A Enamel E3

Block piece C (8 6)

 Block piece A (8 2) Composition: Block piece B (84) Composition: Monomer solution (UDMA: TEGDMA = 1: 1) = 9: 9: 2

 In this example, a three-layer gradient block is manufactured, but can be changed arbitrarily. For example, in this example, the shape of the mold to be used is changed, more block pieces are produced, more layers are formed, and a prosthesis forming block having a more natural color is manufactured. It's okay.

 In addition, the vertical saddle can produce many blocks at a time when the block is manufactured, compared to the horizontal saddle. Therefore, in the production of the gradient block in the above-described form, the above-described embodiment is particularly preferable.

For reference, FIG. 14 is a perspective view (a) and a top view (b) written from the photograph of the obtained molding block 87. Molding professional Block 8 (7), block B (84), and block C (86), each of which formed a good tooth color and the boundary was blurred Provided a grade and proved to be able to provide a more natural aesthetic when processed into a prosthesis. In addition, in the molding block, the rib side is a part to be cut out, and even if a layer with a slightly different direction can be seen, the corresponding part of the block of the prosthesis that is actually processed is aesthetic. Excellent grade is obtained.

Example 5

 In this example, as a variation of Example 4, when manufacturing a dental prosthesis processing block using a vertical saddle, the gradient is not a horizontal stack, but a curvilinear orientation. An example of obtaining a gradation block close to natural teeth will be described with reference to FIG. The molding block of this example can be manufactured basically according to the method described in Example 4 except for the difference that the shape of the block piece B is a curved surface. Therefore, detailed description of the parts using the same configuration as in Example 4, such as block pieces, ribs, and bowls, will be omitted.

First, as shown in FIG. 15 (a), the block piece A (8 2) is mounted on a transparent support container 83. The rib 8 1 is coupled to the block piece A (8 2). Thereafter, as shown in FIG. 15 (b), the block piece B (8 4) is attached to the support container 83. Note that the block piece B (84) used in this example is partially curved as shown in the figure, unlike the block piece B (84) used in Example 4. . FIG. 15 (c) is a view of the support container 8 3 of FIG. 15 (b) as viewed from above. As shown in the figure, a composite resin material is placed in the space between the blocks A and B of the support container 8 3. Has a supply port 8 3 d. Next, as shown in FIG. 15 (d), the support container 8 3 is accommodated in the bowl 11. Thereafter, as shown in FIG. 15 (e), the support container 83 is filled with the composite resin material 86 for forming the block C through the supply port 83d. In this state, it is rotated and stirred with a rotating stirrer, and then cured by photopolymerization by irradiation with blue visible light.

 After curing by photopolymerization, the integrated product of blocks A, B and C placed in the support vessel 83 is heated at a temperature of 140 to 160 for 2 to 3 hours to perform thermal polymerization. By hardening each block piece and composite resin material, blocks A, B, and C are firmly bonded together, and as shown schematically in Fig. 15 (f), it is used to create a sufficiently strong prosthesis. Molded blocks 8 7 are obtained. FIG. 15 (g) shows an example of a part for actually obtaining the anterior prosthesis MG using the molding block 8 7. In some cases, the curvilinear layered block can be made such that its boundary is not known.

Experimental example 1

 In this example, a monochromatic block and a gradient block for processing a dental prosthesis are manufactured according to the method described in the first embodiment.

In order to produce a monochromatic block and a gradient block, a resin, an inorganic filler, and the like are blended so as to have the composition described in Table 1 below. The obtained composite resin material is filled into the vertical saddle shown in Fig. 1 (a), and is stirred for 30 minutes with a rotary stirrer in a vacuum state of 0.6 kPa while removing bubbles. The block to be manufactured is manufactured. Table 1

最初に、 樹脂材として ト リエチレングリコ一ルメ夕ク リ レー ト （

First, as the resin material, triglyceride glycolate (

TEGDMA) 1 8% and diureta dimethacrylate 4% were prepared, and this resin material had an average particle size of 0.1 to 5 ^ m as an inorganic filler, 7 6%, average particle size 1 2% silica with an average particle size of 1 to 40 m and silica of about 0 to 100 nm, iron oxide and titanium oxide as colorants, benzoyl peroxide as a thermal sensitizer, and photosensitizer Nifaquinone and N, N-dimethylaminoethyl methacrylate as a stabilizer and hydroquinone monomethyl ether as a stabilizer are mixed in a separate container, and mixed with a rotary stirrer (Nitaro (trademark), manufactured by Sinky Corporation). , ARV-310). A composite resin material having a predetermined composition can be obtained. Thereafter, the rib shown in FIG. 8 (a) made of brass or aluminum is inserted into the vertical saddle-shaped rib penetrating portion shown in FIG. 1 (a). With the rib attached to the bowl, the first composite resin material having the above composition is poured into the lower space of the bowl in a thickness of about 2 to 3 mm and filled.

 Next, attach a saddle type to the rotary agitator shown in Fig. 2 (ARV-310, manufactured by Sinky Corporation), rotate it around axis 02 and rotate around R 2 (1000 to 2000 rpm), and center around axis 01 Rotate at revolution R 1 (500-100 O rpm). After this rotation / revolution is performed for 30 minutes to 1 hour, the vertical mold is irradiated with visible light or the like for 30 to 60 minutes to polymerize and cure the first composite resin material.

 After the polymerization curing of the first composite resin material is completed, the second composite resin material having the same composition as that of the cured composite resin material is again filled to a thickness of about 2 to 3 cm. In the same manner as described above, a rotating stirring process is performed and irradiation with visible light or the like is performed. As a result of the polymerization and curing, the second composite resin material is polymerized and cured.

 The filling of the composite resin material as described above, the rotating stirring treatment and the polymerization curing are repeated, and the inside of the mold is filled with the cured composite resin material. Next, the composite resin material is heated and polymerized at 140 to 1550 at the front and back temperatures for 120 to 360 minutes. As a result of heat polymerization, the entire composite resin material is completely cured.

 After the composite resin material is cured, the molded block composed of the cured composite resin block 1 3 and the rib 10 shown in FIG. 3 is taken out by pushing the rib toward the vertical opening.

The form of the molded block after curing shown in this example is a configuration in which the materials of the composite resin materials 17a to l7c shown in FIG. 1 (e) are the same. As a modification of this example, the gradation block can be manufactured by changing the color scheme of the composite resin materials 17a to 17c. Regarding the change of the color scheme, the color scheme is the color scheme of the layer perpendicular to the major axis direction of the rib. However, as understood from the following explanation, the normal gradation block is the layer color scheme. It should be noted that the direction of is different by 90 ° and can be used according to the purpose.

 In addition, in the photopolymerization curing process shown in this example, it is appropriate that the irradiation ability of visible light or the like is about 2 to 3 cm in thickness of the resin. It should be noted that, depending on the capabilities of the output device, it may be possible to mold with a single filling of the composite resin material.

 Furthermore, the irradiation intensity of visible light or the like is usually 10 000 0 to 1 000 0 0 1 ux is appropriate for the resin thickness of 1 to 10 mm. If the irradiation intensity exceeds 1 000 0 0 0 1 ux, there are problems in terms of sink marks, warpage, internal vacancies, and stress concentration due to volume change after polymerization. It is not preferable in terms of extremely long time.

 By the way, in the vertical saddle type, the composite resin material is repeatedly filled and cured upward and laminated, and when it is cured by light irradiation from above and below in the second layer or more, the lower part is a colored block, etc. If the composition is light-shielded, light irradiation from below is masked, resulting in uneven curing. For this reason, when the irradiation intensity is too strong, internal vacancies are generated at the lamination interface, which is not suitable for lamination. On the other hand, according to the manufacturing method of this example, it is manufactured as a vertical shape, and a processing block can be manufactured by very easy handling.

Experimental example 2

In this example, a dental block (6 colors shown in Table 2 below) for dental prosthesis processing is manufactured according to the method described in Example 1. In order to create a gradation block, this example uses two types of composites. Resin material (hereinafter also referred to as resin) R 1 and R 2 are used. The composition of resins R 1 and R 2 (excluding colorants) is shown below.

Resin R 1:

 Siri force (0.1 to 5 m diameter) 76w / w silica (10 to 100 nm diameter) 2w / w%, TEGDMA llw / w¾, UDMA llw / w¾, camphorquinone 0.02w / w%, N, N- Dimethylaminoethyl methacrylate 02w / w%, benzoyl peroxide: 0.02w / w%

Resin R 2:

 Silica (0.1 to 5 m diameter) 67w / w%, Silica (10 to 100 nm diameter) 7w / w TEGDMA 13w / w%, UDMA 13w / w¾ Camphorquinone 0.02w / w%, N, N-dimethyl Aminoethyl methacrylate 0.02w / w¾, benzoyl peroxide: 0.02w / w¾

 Combining these resins with colorants (yellow, red, white) to prepare composite resin materials having concentration gradients of different colors. Here, the concentration gradient distinguishes between 1 0 and 0 as shown below.

 100: A1 pigment concentration is 100%,

 50: A1 pigment concentration is 50%,

 30: A1 pigment concentration 30%,

 20: A1 pigment concentration is 20%

 10: A1 pigment concentration is 10¾, and

 0: A1 pigment concentration is 0%.

 The pigment composition corresponding to A1 is

 Red iron sesquioxide 0.00044w / w¾,:

 Yellow ferric oxide 0.0044w / w¾, and

 White titanium dioxide 0.0716w / w%. Put the prepared composite resin materials in separate containers.

In this example, as shown in Table 2, the color density of each layer and the above-mentioned 10 combinations of resins with the same composition were prepared, each composite resin material was set in a rotary stirrer and kneaded for 30 minutes to 1 hour while repeating rotation and revolution. Prepare mixed resin materials of different colors.

 The vertical type used in this example is the vertical type shown in FIG. Using this saddle shape, first, a dark composite resin material is filled to a thickness of 0.3 to 1 cm, and the composite resin material is placed in the saddle shape and attached to the rotary stirring device shown in FIG. Stir processing is performed. Next, the visible light in the blue region is irradiated with visible light in the blue region from the bowl-shaped opening for approximately 100 seconds, and this is polymerized and cured. Therefore, a cured resin layer is obtained.

 Then, the composite resin material of the color shown in Table 2 below is filled from the top of the cured resin layer with a thickness of 0.3 to 0.8 cm, and the same time as above by a rotary stirrer. A rotary stirring process is performed. Next, visible light or the like is irradiated from an opening of the bowl shape for 60 to 400 seconds by an irradiation device such as visible light, and this is polymerized and cured. Therefore, a cured resin layer is obtained.

 Further, the resin layer cured as described above is filled with a composite resin material having the same color as shown in Table 2 below, and cured by the same rotational stirring treatment and polymerization curing treatment as described above. Get a layer.

 After that, for curing by thermal polymerization, the vertical mold with the laminated cured resin layer still remains in the vertical shape for 1400 to 1600 for 3 00 0 to 1 0 00 0 00 seconds. Heat. After the polymerization and curing are completed, the laminated cured resin layer is taken out of the vertical mold to obtain a ribbed gradation block.

 [Sensory test]

Total of four grade blocks stacked as above Make 8 pieces and conduct visual sensory test by one or more people. Table 2 shows the results obtained. As a result of this sensory test, at least the boundary of the second layer can hardly be confirmed, and the boundary of the third and subsequent layers can hardly be confirmed. As a result, it can be seen that the gradation block subjected to the sensory test has a natural gradation and is excellent in aesthetics.

 Table 2 (Part 1)

第 2表 （その 2 )

Table 2 (Part 2)

官能試験の判定基準

Criteria for sensory tests

 ◎: Boundary layer is not noticeable at all; 〇: Boundary layer is clearly understood by looking closely; △: Boundary layer is known; X: Boundary layer is clearly seen [Strength test]

Make a gradient block with 6 layers stacked as described above. Next, the gradation block is cut out with a diamond cutter, and a bending test piece: size 25 mm (length) X 2 mm (height) X 2 mm (thickness) is produced. In addition to preparing a test piece derived from a gradient block, prepare three test pieces derived from a block of only one layer as a comparative example, and perform a bending strength test and an aesthetic evaluation on these test pieces. The results obtained are shown in Table 3.

Table 3

第 3表から、 6層積層させたブロックと 1層のブロックとは、 同 様の強度を備え、 また、 境界が認識できない自然なグラデーショ ン を備えた審美ブロックが得られることがわかる。 なお、 本例で得ら れるブロックは、 C A D C A Mで用いられる研削、 切削加工におい て、 積層境界面で破折や脱落するといつた問題がなく、 従来のレジ ン系ブロックの快削性と同様、 快削性を備えていた。

From Table 3, it can be seen that the 6-layer laminated block and the 1-layer block have the same strength, and an aesthetic block with a natural gradient with unrecognizable boundaries. In addition, the block obtained in this example has no problem when it breaks or falls off at the layer boundary in the grinding and cutting processes used in CADCAM. Like the free machinability of conventional resin blocks, It had free-cutting properties.

Experimental example 3

 In this example, the fabrication of a translucent block following the method described in Experimental Example 1 is explained.

In order to produce a translucent block, a resin, an inorganic filler, and the like are blended so that the composition shown in Table 4 below (formulation example) is obtained. Table 4

In accordance with the formulation example shown in Table 1, each reagent is weighed into a plastic container and mixed with a rotary stirrer (Nartaro (trademark) ARV-310, manufactured by Shinky Corporation). Next, the obtained paste was filled into the vertical bowl shown in Fig. 1, and rotated and stirred for 20 minutes with a rotary stirrer (ARV-310 manufactured by Nintaro (trademark) Shinky) 2. Opaque vacuum To remove bubbles. After that, the composite resin material is cured by photopolymerization by irradiating light with a wavelength of around 47 nm from the side surface of the saddle shape for 10 minutes. Subsequently, the composite resin material is cured by thermal polymerization. Remove the block formed by polymerization hardening from the mold and use it as a CADCAM cutting block. This block is a translucent block that can be fully machined by CADCAM. Example 4

 In this example, we will explain the preparation of a block by heat polymerization according to the method described in Experimental Example 1.

 TEGDMA15¾, UDMA15¾, benzoyl peroxide 0.09%, silica (20 nm average particle diameter, methacryloxypropyl trimethylsilane treated with silane force) 2%, and silica (0.3_im average particle diameter, (A product of silane coupling treatment with triacryloxypropyl trimethoxysilane) In 68, weigh the reagent in a plastic container and mix it with a rotary stirrer (ARV-310 manufactured by Neritaro (trademark) Shinky). The obtained paste is filled in the vertical bowl shown in Fig. 1, and is stirred for 20 minutes with a rotary stirrer (ARV-310 made by Shintaro (trademark) Shinky) 2. Remove air bubbles. Another method for filling the mold is to push the vertical mold shown in Fig. 1 into the mixed paste by physical and rotary stirring to fill the paste into the mold. Put them in a thermostat and gradually raise the temperature up to 150 in the air and in a nitrogen atmosphere to cure. Remove the block from the saddle and use it as a CADCAM cutting block. As a result, the surface and shape of the product in a nitrogen atmosphere were more beautiful than those in the air. As a result of conducting a three-point bending strength test in accordance with JI ST 6517, the three-point bending strength was 122 MPa.

Example 6

 An embodiment of the present invention will be described with reference to FIG.

As the colorimetric means 1 1 1, means that can measure color mainly such as a digital camera, a digital video, and a colorimeter as shown in the figure are shown. The user terminal 1 1 2 is intended to receive the supply of prosthesis using the system, and is exemplified by a medical practitioner, a dental laboratory, etc., which are located at some distance. For example, the data measured by the colorimetric means 1 1 1 is decomposed by the user terminal 1 1 2 into L *, a *, b * values, or C, M, Y, and 色 color information values. Compare with the adjacent tooth or reference color data measured at the same time, adjust numerically, and adjust to an approximate color.

 In the present invention, a surface layer is finally formed, but the coating by the surface property greatly affects aesthetics. Therefore, the surface layer is virtually overlapped by software, so that the final surface layer is formed. It is preferable to adjust the color tone information while verifying the visual appearance.

 In the case of a virtual arrangement of the surface coating, the elements are preferably parameters with large transparency and thickness, and are further adjusted with parameters such as the position of the prosthesis and the color of the adjacent teeth. .

 Examples of the bi-directional or uni-directional network 1 1 3 include an intranet, an intranet, and a wireless LAN. Further, the processing side terminal 114 is a side that inputs shape information and color information of the prosthesis, and controls and operates the prosthesis manufacturing and coloring process.

 The configuration from the colorimetric means 1 1 1 to the network 1 1 3 is made more realistic by taking electronic and mechanical eye colorimetry and incorporating it into the processing terminal 1 1 4 It is intended to achieve convenient printing of prosthetics, but at least the configuration of the processing side terminal 1 14 or later allows dentists, dental technicians, etc. Since it is only necessary to determine the print color by inputting color information directly into the processing-side terminal 1 1 4 using a colorimetry tool prepared separately, it may not always be an essential configuration.

 The three-dimensional object printing means 1 15 is exemplified by a material printer, a two-dimensional ink jet printer for three-dimensional object printing, and the like.

The illustrated nozzle 1 15 a is an ink jet nozzle, and, for example, moves on the xy plane. Do not reciprocate in the y-axis direction. Move in the x-axis direction, or move in the y-axis direction while reciprocating in the X-axis direction. Further, the pedestal may move in the y-axis direction or the X-axis direction by reciprocating only in the X-axis direction or the y-axis direction.

 The placement portion 1 1 5 c is a portion on which the coloring prosthesis is placed. The mounting portion 1 15 c is preferably rotatable because the printing means 1 15 may also coat the back and side surfaces.

 Machining means 1 1 6 is a device for obtaining a prosthesis H by moving an unprocessed block B by moving a rotary mill extending in the z-axis direction, cutting it, and rotating the rotary mounting part 1 1 6 b Fig. 16 shows a part of the media 1 1 7 for recording the data obtained by the colorimetric means 1 1 1 and moving the data to the processing terminal 1 1 4 Along with the impression concave model IS of the prosthetic site, it is sent by bringing, mailing, delivery route 1 1 7 a.

 Next, the operation of the present invention will be described in detail with reference to FIG. 16, FIG.

 In Fig. 16, the tooth color of the abutment tooth SH and the adjacent teeth RH1 and RH2 on the missing tooth portion is measured by the colorimetric means 1 1 1. The colorimetric means 1 1 1 is a measuring instrument that is closer to the naked eye, such as Crystal Eye (trademark) as a colorimeter; Shade scan (trademark) manufactured by Olympus; Special (trademark); used by Matsukaze.

 In this case, it is preferable to encode the color value of the adjacent tooth. However, when it is difficult, it is preferable to photograph the standard RS having a standardized shade value adjacently.

 Also, if the colorimetric means 1 1 1 cannot measure the color of the prosthesis, it may be replaced by a visual measurement by a dentist or dental technician.

Color measurement method 1 1 1 The color data obtained by 1 is USB cable 1 1 3 a When the prosthesis color is determined, etc., is input to the user terminal 1 1 2 via the network etc., this data is sent to the processing side terminal 1 1 4 via the network 1 1 3 Make it available by uploading to the homepage.

 In addition, an impression is taken of the missing part, and a concave IS having an inside appearance is obtained. From the concave model, the margin line of the prosthesis H, the maximum ridge, and the occlusal surface are obtained, and the other parts are mathematically complemented to obtain the prosthesis shape data.

 On the other hand, for users who undertake to make prosthetics, it is necessary to send the imprinted model IS, so the colorimetric data can be transferred to media such as SD cards, USB memories, CDs, DVDs, etc. 1 It can be memorized in 1 7 and mailed or delivered via route 1 1 7 a together with the impression impression model IS.

 The processing terminal 1 1 4 creates a prosthetic model and a virtual model using the wax-up and wax-upless method from the acquired impression concave model IS. The processing block B is processed based on this data.

 For example, machining is performed with the CAM type machining means shown in Fig. 16 (partially shown) 1 1 6. Machining from the side of block B with mill 1 1 6 a. Block B is fixed by inserting rib R into block mounting part 1 1 6 b of processing means 1 1 6.

 The block after processing is shown in Fig. 17 (a). In the state shown in Fig. 17 (a), the prosthesis H and the rib R are separated, and the state shown in Fig. 17 (b) is obtained. Figure 17 (b) is a side view of the prosthesis.

 The prosthesis H is placed on the placing portion 1 15 c of the three-dimensional object printing unit 1 15 shown in FIG.

Color data input to the processing terminal 1 1 4 can be processed graphically Open with a general purpose program. Figure 18 shows the program display on the screen of user terminal 1 14.

 In FIG. 18 (a), the prosthesis contour 1 3 4 is moved to the machining area 1 3 3.

 Input the C MYK value measured by the colorimetric means 1 1 1 into the C MYK input section of the color box 1 3 2 and compare and adjust to determine the tooth color with the gradation. Fig. 18 (b) shows the state where the gradient 1 3 5 is being tried.

 Also, Fig. 19 shows a diagram in which multiple colors are superimposed and the tooth color is tried.

 Fig. 1 9 Color A (1 4 1) and prosthesis A (1 4 2) superimposed, Color B (1 4 3) and prosthesis A (1 4 4) superimposed Can be displayed side-by-side and superimposed on the screen to see the color status.

 These trials are repeated, and the three-dimensional object printing means 1 15 is driven and printed based on the determined tooth color. This process is repeated to color the surface with gradation.

 2D printing means for solid objects 1 1 5 is a 3D shape printed on the basis of 2D data, so it is easy to operate the software, but an adjusted esthetic prosthesis can be obtained. When coloring the entire H, a rotating mounting portion 1 15 c as shown in FIG. 17 (c) is used.

 The mounting portion 1 1 5 c is formed so that holding portions 1 1 5 c 1 and 1 1 5 c 2 sandwiching and fixing the prosthesis H on both sides can rotate around the shaft 1 1 5 c 3.

Inkjet head 1 1 5 a As it moves back and forth, left and right, ink is ejected and colored. Fig. 17 (d) rotates Fig. 17 (c) 90 degrees. It is the figure shown.

 When the prosthesis H is an anterior tooth, the colored surface with the gradient may be limited to the front surface, so that it is not necessary to use the rotating mounting part 1 15 c as shown in Fig. 17 (c) There is also.

 FIG. 17 (e) is a cross-sectional view of the prosthesis H after coloring, H I is a white base, and H 2 is the actual tooth color. H3 is the back side, printed with the actual tooth color.

 Finally, surface treatment is performed. In the surface treatment, for example, the printed prosthesis is immersed in the solution of composition 1 in Table A described above, and a light curing treatment is performed to obtain the surface layer H4. The surface layer protects and improves the aesthetics of oil-based inks that cannot be removed with water-based inks while preventing the printed surface from peeling.

Next, specific blending examples and production examples of block B will be described. Table B below is an example of Block B formulation.

Table B

表 Bの配合例 （組成 6又は 7 ) に従い、 試薬をプラスチック容器 に抨量し、 回転攪袢機 （練太郎 （商標） ARV-310 ; シンキー社製） で混合する。 得られたペース トを図 1 に示す縦型の铸型に注入し、 回転攪拌機 （練太郎 （商標） ARV-310) で 20分、 2. OkPaの真空状態 で回転攪拌を行い、 気泡を取り除く。 その後、 铸型の側面から 470η m前後の波長の光を 10分間照射してブロックを硬化させる。 铸型か らブロックを取り出し、 CAD/CAM切削用ブロックとする。

In accordance with the formulation example in Table B (Composition 6 or 7), weigh the reagent in a plastic container and mix with a rotary stirrer (Nertaro (trademark) ARV-310; manufactured by Sinky Corporation). The obtained paste is poured into the vertical bowl shown in Fig. 1 and stirred for 20 minutes with a rotary stirrer (Nertaro ARV-310). . After that, the block is cured by irradiating light with a wavelength of around 470 ηm for 10 minutes from the side of the bowl. Remove the block from the saddle and use it as a CAD / CAM cutting block.

Example 7

 From the abutment tooth S H sandwiched between the adjacent teeth R H 1 and R H 2 shown in Fig. 16, an impression including a pair of teeth is taken to form a concave model I S.

The shape data of the prosthesis H is formed from the concave model IS, and the transparent block B obtained by the above-described manufacturing method is processed based on this data. 6 (CADIM (registered trademark) 10 5; made by Advance Co., Ltd.) to obtain a transparent front tooth crown.

 The user visually determines the optimum shade while comparing the shade SH with the colors of the adjacent teeth R H 1 and R H 2, and inputs the color data into the color data input box 1 3 2 shown in Fig. 18.

 Based on the value entered in the input box 1 3 2, perform a virtual coloration of the gradation on the color data and repeat it on a trial basis. Furthermore, test printing is performed by making a plurality of the same model or by using a dummy model and determining the color.

 For printing, DJ-3203Pro (trademark) (manufactured by AIC Co., Ltd.) is used. Place the anterior crown (uncolored) prepared in the above with clay on the stage, so that the side of the lips faces the front of the head. The installation position was grasped with a ruler, and the printing position was determined on the software. First, print on the prosthesis for layer 1 (white ground color). Dry at room temperature for about 10 minutes, then print on the same prosthesis for layer 2 (main coloring). Similarly, it is dried at room temperature for about 10 minutes, a paste of composition 1 is applied to the printing surface by dipping, and cured by irradiating light with a wavelength of around 470ηπι for 10 minutes. It is heated in a dryer at 100 for 3 hours to form a surface layer to produce an anterior tooth crown.

 The anterior tooth crown produced in this example has a color scheme that is visually balanced with the adjacent teeth. The block Β may be, for example, a gradation block shown in FIG. 14 in addition to the transparent block. In this case, coloring may be performed so as to erase the line generated at the boundary of the color layer.

Example 8

In this example, the use of oil-based ink will be described. Oil-based ink (PMMA 5wt¾, TEGDMA / UDMA lwt¾, silica lwt%: 20nm average particle diameter, silane silane treated with xyloprovir trimethyoxysilane, pigment 2.5wt% each: titanium oxide, yellow iron trioxide , Bengala, camphorquinone 0.1 lwt% or less, hydroquinone monomethyl ether 0.1 lwt% or less, N, N-dimethylaminoethyl methacrylate 0.1 lwt¾ or less, ethyl acetate / butanol 90.5 wt%) An oil-based ink comprising the components is produced, and printing is performed using the ink according to the same method as in Example 8. A transparent front tooth crown can be colored to the same extent as the results obtained in Example 8. Example 9

 In this example, the manufacture of a block whose strength is increased by orienting fibers will be described with reference to FIGS. 20 and 21. FIG. FIG. 20 and FIG. 21 explain the manufacturing method of this example step by step, and show the first half and the second half of the manufacturing method, respectively.

 In FIGS. 20 and 21, reference numeral 2 0 1 is a fiber bundle, which is made of glass, plastic or the like. Further, 20 2 is a bundling band and may be a band for bundling and holding the fiber bundle 20 1, and an elastic rubber band is exemplified.

 Reference numeral 20 3 is a fiber bundle end fixing mold A, 2 0 5 is a fiber bundle end fixing mold B, and 2 0 4 is a fiber bundle end fixing hardener. It is. The end-fixing curing agent 204 is preferably composed of the same material as the block to be formed, because there is no unnecessary color difference in the finished block.

Reference numeral 2 06 is a mold body having an internal volume that can accommodate the end fixing mold. 2 0 7 is a lid for the mold body 2 06 and is attached to the upper part of the mold body 2 0 6. In addition, 20 8 is a fixed band, and the state where the mold body 20 06 and the mold body lid 20 07 are attached is shown in FIG. It is made of a stretchable material that can be fixed by rolling the fixed band 2 8 or a string that can be tied.

 Reference number 20 9 is a fiber bundle that swells when the fiber bundle 2 0 1 is pushed inward from both ends when the mold body 2 0 6 and the mold body lid 2 0 7 are attached. 2 0 1 bulge.

 2 10 is the composite resin material of the present invention as described above, typically a resin and ceramic composite material slurry. After curing, a block 10 1 based on the mold is formed.

 2 1 1 is a rib, which is a portion formed of a metal material for mounting the block 1 0 1 to the processing jig. In some cases, such a stationary rib is unnecessary. The rib 2 1 1 is fixed to the side surface of the hardened block 10 1 by adhesion or the like.

 2 1 2 is a processing tool, such as a rotary drill or a mill, which is used to grind and cut the block 1 0 1 while rotating.

 2 1 3 is an abutment tooth, 2 3 1 is a schematic diagram showing the gingival part

2 1 4 is a post-processed crown-type prosthesis, and 2 4 1 is an abutment tooth mounting recess.

 2 1 5 is a schematic diagram of a pair of teeth.

 Next, the implementation of this example will be specifically described.

First, as shown in FIG. 20 (a), the fiber bundle 2 0 1 is bound with a binding band 2 0 2, where the fibers are bundled and in some cases at intervals. Next, as shown in FIG. 20 (b), the end fixing mold A (2 0 3) and the end fixing mold B (2 0 5), which are not shown, are inserted into the round holes. Fill with edge fixing curing agent 204. Next, as shown in FIG. 20 (c), the end of the fiber bundle 2 0 1 is immersed in an end fixing curing agent 2 0 4 of the end fixing mold A (2 0 3). The other end of the bundle 2 0 1 Immerse in an end fixing curing agent 0 0 4 of the end fixing mold B (2 0 5). Then, the end fixing curing agent 204 is cured by heat or light.

 After curing of the curing agent 20 4 is completed, the binding band 2 0 2 is removed by cutting or the like. Next, both ends of the fiber bundle 2 0 1 shown in FIG. 2 0 (c) are attached to the end of the mold body 2 0 6 shown in FIG. 2 0 (d), which is the block mold, 2 0 4 Then, those fixed to the end fixing mold A (203) and the end fixing mold B (205) are inserted (see Fig. 20 (e)).

 Thereafter, as shown in FIG. 20 (f), the upper surface of the mold body 2 06 is covered with a lid 2 0 7 and fixed with a fixing band 2 0 8 such as a string. At this time, the fiber bundle 20 0 1 is adjusted using a spacer or the like so that a bulge portion 20 9 having a swelled center is formed. Note that the fiber bundle 20 1 may be set in a state of being spaced in parallel in advance.

 Next, as shown in FIG. 21 (g), a composite resin material (resin composite material) 2 10 is injected from the injection hole 7 1 of the lid 20 7, and rotation recommended for use in the present invention is performed. · Using a revolving stirrer, knead while defoaming by rotation and rotation under vacuum, and then polymerize and cure with heat and light. At this time, since a bulging portion 2 09 is formed in which the center of the fiber bundle 20 1 swells, a space can be created between the fibers, and a filling block 1 0 1 made of a resin free of bubbles can be formed. Can be easily obtained. In addition, spacers having various shapes may be arranged between the fibers so that a filling space is formed between the fibers in advance. After curing, remove the block from the mold and attach the cutting rib 2 1 1 to the side of the block 1 0 1 with an adhesive or the like as shown in Fig. 2 1 (h).

As for actual use, as shown in Fig. 2 1 (i), it is installed in a CAD / CAM cutting machine and is ground and cut by the processing tool 2 1 2. In this way, the prosthesis (bridge) as shown in Fig. 21 (j) ) 2 1 4 is completed. Fig. 2 1 (j) is actually attached to the two abutment teeth 2 1 3 on the gum 2 3 1 with the abutment mounting recesses 2 4 1 of the bridge 2 1 4 facing FIG.

 FIG. 2 1 (k) shows a state in which the bridge 2 1 4 is attached to the two abutment teeth 2 1 3. As shown in this figure, when the prosthesis 2 1 4 after processing is installed, the fibers are oriented in the transverse direction with respect to the occlusal direction with the opposing teeth 2 1 5, so the tensile stress is reduced. There is a possibility that a block with high toughness can be produced. Furthermore, not only for the purpose of reinforcement, but also because it is bonded to multiple fibers, in the event of breakage, accidental ingestion due to the loss of the prosthesis can be prevented probabilistically.

 In the implementation of this example, examples of the fiber material include plastic fibers such as glass fiber, polyethylene, polypropylene, and polyacryl. The diameter of these fibers is usually several ΙΙηπ! The range of ~ is preferable. The surface treatment of the fiber is a silane coupling treatment in which a monomer is introduced when the monomer fiber is glass fiber, and plasma treatment, corona discharge, By UV treatment, functional groups such as hydroxyl, carboxyl and amino groups are generated on the surface, and once again a polymerizable monomer with reactive sites such as epoxy, isocyanate, and imidazole groups that bind to the functional group. Surface treatment can be an effective means because it forms a polymer with the resin afterwards.

In addition, although this example shows about a bridge | bridging, it can be used conveniently also for the block for single crowns, such as a crown. The processed prosthesis can suppress cracking due to mastication or the like. Further, as described above, the present invention is a method in which the reinforcing material can be fixed at the time of molding and the internal bubbles can be suppressed and filled. Therefore, the reinforcing material can be a nonwoven fabric of fibers, a knitted fabric, It is also possible to use a sheet or a three-dimensional structure that is bridged by bonding. The fiber may be hollow or porous. Industrial applicability

 According to the present invention, a hybrid block of a resin and an inorganic filler used in the manufacture of a dental prosthesis using CADCAM is provided, which is superior in strength and aesthetics compared to a block made of ceramic or resin alone. Since it can be manufactured, a more rational prosthesis can be manufactured in the dental field.

 Further, according to the present invention, it is possible to produce a dental prosthesis having improved aesthetics, which is suitable as a prosthesis for the front tooth surface.

Claims

Claim 1  A method of manufacturing a dental prosthesis processing block,  Preparing a bowl having an inner surface shape corresponding to the outer surface shape of the block;  Filling the saddle mold with a composite resin material containing a resin and an inorganic filler dispersed in the block, the block being able to be formed by curing blue.  A step of subjecting the composite resin material to a rotating stirring process while accommodating the composite resin material in the saddle shape;  Surrounding  And a step of curing the composite resin material after the stirring treatment by polymerization. Claim 2  The block is composed of a unitary combination of a plurality of block members, and in the filling step, the composite resin material is filled in a plurality of times, and after each filling step, the rotational stirring treatment step and the curing process are performed. The method according to claim 1, wherein the steps are sequentially performed, and after the final curing step, the obtained cured product is further overlapped and cured to form the combined body. Claim 3 The block is composed of a unitary combination of a plurality of block members, and in the filling step, a plurality of composite resin materials having different hues are prepared and sequentially filled, and after each filling step, under vacuum 3. The combined body is formed by sequentially performing the rotary stirring treatment step and the curing step, and after the final curing step, further polymerizing and curing the obtained cured product. The method described. Claim 4  In the filling step, instead of producing the block member by filling the composite resin material, subjecting it to a rotating stirring process, and further performing hardening on site, the composite resin material is filled. The method according to claim 2, further comprising a step of loading the block member, which is produced by subjecting to a rotary stirring process, and further performing curing in a manner other than on-site, to the saddle. Claim 5  The method according to any one of claims 2 to 4, wherein the filling step further includes the step of forming the block member in the presence of a partition member disposed in the saddle mold. Claim 6  6. The method according to claim 5, wherein the surface of the partition member includes a plurality of minute protrusions, and the pattern of the protrusions is transferred to the surface of the block member.  In the said saddle type, the outer surface shape is prescribed | regulated by the said inner surface shape, The major axis direction of the said block is a substantially perpendicular direction or a horizontal direction with respect to the rotating shaft direction of the said saddle type, The any one of Claims 1-6 The method described in 1. Claim 8  The method according to any one of claims 1 to 7, wherein, in the rotational stirring treatment step, the mold is rotated in a revolving manner and simultaneously in a revolving manner. Claim 9  The method according to any one of claims 1 to 8, wherein the composite resin material includes a fibrous reinforcing material therein. Claim 1 0 A dental prosthesis processing block manufactured by the method according to any one of claims 1 to 9. Claim 1 1  The block according to claim 10, wherein the block is formed of an integrated combination of a plurality of block members, and a gradation of a color with a blurred boundary is provided on an outer peripheral surface thereof. Claim 1 2  The block according to claim 10, wherein the block does not have bubbles therein.