JP2017122070A - Dental frame, dental prosthesis using the frame, and method for producing a dental prosthesis - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a dental frame material having good shape compatibility with an abutment model. The present invention is a dental frame composed of a structure in which a plurality of columnar objects composed of a plurality of continuous fibers and a resin are joined. The resin is preferably a thermoplastic resin, the continuous fiber is preferably glass fiber, carbon fiber, or ceramic fiber, and the cross-sectional area of the columnar object is preferably 0.005 mm to 3.0 mm 2. The dental frame of the present invention can be made into a dental prosthesis by further laminating a dental restoration material. [Selection diagram] None

Description

  The present invention relates to a dental frame. More specifically, the present invention relates to a dental frame used for a high-strength dental prosthesis and a simple manufacturing method thereof.

  Conventionally, gold-silver-palladium alloys and the like have been used as dental metals, but the development of alternative materials has been demanded from the viewpoints of rising precious metal prices, aesthetics, and metal allergy. Resin-based materials have recently been used for a variety of reasons, including low wear resistance to paired teeth and ease of repair in the oral cavity. It has not reached.

  Attempts have been made to improve the mechanical strength of glass fibers using resin materials.

  For example, Patent Document 1 discloses the following technique.

  A frame material for producing a dental prosthesis comprising a continuous inorganic fiber substrate (A) composed of a plurality of inorganic fiber bundles and a fiber-reinforced resin composite sheet containing a crystalline thermoplastic resin (B) having a hydrogen bonding site.

  This patent uses a preformed fiber-reinforced resin composite sheet as a prepreg to produce a dental prosthesis frame material, and is characterized by using a crystalline thermoplastic resin having hydrogen bonding sites. As a result, a high-strength, high-rigidity dental prosthesis can be produced by a simple method, and the composite sheet is formed by thermoforming so as to show a three-dimensional structure such as a wing-like structure or a box-like structure and used as a frame material By doing so, it is said that higher strength can be obtained.

However, the frame material obtained by molding the fiber-reinforced resin composite sheet described in the publication may be effective from the viewpoint of improving the strength, but the abutment tooth (or abutment tooth model) to be treated by an individual The shape following property for each abutment tooth was insufficient when it was formed into a three-dimensional structure, such as bending is likely to occur at the bent portion. In designing a dental frame material, it is important from the viewpoint of durability to appropriately arrange a frame material having a fiber as one component at a position where stress is concentrated. That is, the strength and durability can be further improved by adapting the dental frame material to the surface shape of the abutment tooth so as to reduce the clearance as much as possible. Conventional dental frame materials have problems in that they are not sufficiently compatible with the abutment tooth, and the fibers cannot be properly disposed at a site where stress is concentrated.

JP-A-2015-98450

  The present invention relates to a dental frame having high strength and rigidity, and having excellent shape compatibility with an abutment, and having excellent durability, a dental prosthesis using the frame, and a method for producing a dental prosthesis The purpose is to provide.

  The present inventor has intensively studied to solve the above problems. As a result, high strength and rigidity can be obtained by using as a frame material a structure obtained by joining a plurality of continuous pillars and resin as a basic structural unit. It has been found that a dental frame with good reproducibility can be produced by a simple method, and the present invention has been completed.

  That is, the present invention is a dental frame made of a structure in which a plurality of columnar objects composed of a plurality of continuous fibers and a resin are joined.

  In the present invention, the resin is preferably a thermoplastic resin.

  In the present invention, the continuous fibers are preferably glass fibers, carbon fibers, or ceramic fibers.

In the present invention, it is preferable that the pillars are cylindrical or elliptical cylindrical in cross-sectional area 0.005mm ² ~3.0mm ^2.

  In this invention, it is preferable that it is a dental prosthesis containing the said dental frame.

  In a preferred embodiment of the present invention, a process for producing a dental frame comprising a structure in which a plurality of columnar articles composed of a plurality of continuous fibers and a resin that match the surface shape of an abutment model are joined together is provided. And a method of manufacturing a dental prosthesis comprising a step of laminating a dental restorative material on the dental frame.

  According to the present invention, a dental prosthesis in which fibers are arranged at an optimum position and has high strength, high rigidity, and excellent adaptability can be produced by a simple method.

The schematic diagram which showed a part of dental frame of this invention to which the columnar object comprised from several continuous fiber and resin was joined. The schematic diagram of the state which adapted the dental frame of this invention on the surface of the abutment. Schematic diagram of a dental frame with a central arc bent

1 Continuous fiber 2 Columnar
3 Joint 4 Column 5 Dental Frame 6 Abutment

  The dental frame of the present invention is composed of a structure in which a plurality of columnar objects composed of a plurality of continuous fibers and a resin are joined.

  The dental frame of the present invention (hereinafter also abbreviated as the frame of the present invention) is a material mainly used for a dental prosthesis, and is a prosthetic structure for the purpose of reinforcing mechanical strength and durability. The reinforcement member which comprises a part of is represented. In order to reinforce the strength of the entire prosthesis, it is preferable that the prosthesis is arranged at a location that is particularly strong, such as stress is easily concentrated, for example, at a position that matches the shape of the abutment immediately above the abutment.

  The dental prosthesis in the present invention is an artificial material used for the purpose of restoring functional and esthetic properties of the stomatognathic system caused by a loss of teeth or tissue related to the teeth. Specifically, it refers to an inlay, an onlay, a crown, a bridge, a denture (full floor, partial floor), an artificial tooth, an implant superstructure, and an implant abutment. The present invention is particularly suitable for bridges that require high mechanical strength.

  The columnar material in the present invention is a composite material composed of a plurality of continuous fibers and a resin formed into a columnar shape having a cross section and a length and a unidirectional directivity. The continuous fibers are oriented in the columnar length direction. A dental frame is produced by joining a plurality of these columnar objects.

  The fiber used in the present invention is composed of a plurality of continuous fibers. Here, the term “continuous” means that fibers are present from one end of the columnar object to the other end without a break. The term “multiple” means that there are at least two continuous fiber yarns.

  There is no restriction | limiting in particular as a material of the fiber used for this invention, Carbon fiber, glass fiber, a resin fiber, a ceramic fiber, etc. can be used. Carbon fibers, glass fibers, or ceramic fibers are preferable because a dental frame with high strength and high rigidity can be obtained. Glass fiber or ceramic fiber is preferable because of its high aesthetics. Examples of the carbon fiber include PAN-based carbon fiber and pitch-based carbon fiber. Examples of the glass fiber include E glass, C glass, S glass, R glass, D glass, AR glass, T glass, NCR glass, NE glass, and S2 glass. Examples of the resin fiber include nylon resin, polyethylene fiber, aramid fiber, and xylon fiber, and examples of the ceramic fiber include zirconia fiber and silica fiber.

  When glass fiber or ceramic fiber is used as the continuous fiber of the present invention, it is preferable to carry out a surface treatment in order to improve the compatibility with the resin or improve the strength. When the familiarity with the resin is improved, there are advantages such as fewer bubbles in the columnar material. In addition, the adhesion between the continuous fiber and the resin is increased, and the penetration of low molecular weight compounds such as water can be suppressed, which contributes to the improvement of long-term durability. As the surface treatment method, a coating treatment, an etching treatment, a conditioning treatment, a corona treatment, a plasma treatment, a heat treatment, a mechanical treatment such as a sandblast, a primer treatment, a coupling treatment, or the like can be applied, and these may be combined. What is necessary is just to select the surface treating agent to be used suitably from a compatible viewpoint of a fiber and resin. When the fiber is silica fiber or glass fiber, surface treatment with a silane coupling agent is preferable. The surface treatment agent may be used alone or in combination of two or more.

  The amount of the surface treatment agent relative to the fiber may be appropriately determined from the results of the specific surface area of the fiber and the preliminary test of the physical properties, but is generally 0.1 to 20 parts by weight, preferably 0. It is selected from the range of 5 to 10 parts by mass. The surface treatment method is also a method in which an aqueous solution or alcohol solution of a surface treatment agent is sprayed on the fiber, followed by stirring and drying by heating (dry treatment method). A surface treatment agent is added to a fiber soaked in water or alcohol for a predetermined time. A publicly known method such as a method of collecting fibers later and drying by heating (wet treatment method) or an integral blend method can be used without limitation.

  The diameter of the continuous fiber of the present invention is preferably 1 to 100 microns, more preferably 4 to 25 microns. If the diameter is too large, it will be difficult to bend into an arbitrary shape. When the diameter is too small, the impregnation property of the resin is lowered.

  As the method for producing the continuous fiber of the present invention, a known method can be used without limitation.

  The resin described in the present invention plays a role of a matrix in which a plurality of continuous fibers are dispersed in a columnar product. As the resin, either a thermoplastic resin or a thermosetting resin can be used, but a thermoplastic resin is preferable because the columnar material can be easily handled and the productivity of the dental frame is high. Specific examples of thermoplastic resins include polyethylene, polypropylene, polystyrene, polyvinyl acetate, polyacetal, polycarbonate, polybutylene terephthalate, polyuric acid, ABS resin, polyamide, polyethylene terephthalate, acrylic resin, methacrylic resin, polysulfone, and polyether. Examples include sulfone, polyphenylene sulfide, polyarylate, polyamideimide, polyetherimide, polyaryletherketone, polymethylpentene, and liquid crystal polymer. From the viewpoint of high biological safety as a dental frame, methacrylic resin, polypropylene, polyacetal, polyamide, polysulfone, and polyaryletherketone are preferable. Polyaryl ether ketone is particularly preferred because it can provide high strength and high rigidity. Examples of the polyaryletherketone include polyetherketone, polyetherketoneketone, and polyetheretherketone.

  The molecular weight of the resin of the present invention is not particularly limited, and a resin having a molecular weight capable of obtaining the effects of the present invention may be appropriately selected and used. In order to obtain high durability in the oral cavity, the weight average molecular weight is It is preferably 10,000 or more, and more preferably 100,000 or more. Note that gel permeation chromatography is used to measure the molecular weight of the resin. The measurement conditions may be appropriately selected from columns, solvents, temperatures, etc. depending on the properties of the target resin. For example, hexafluoroisopropanol is used as a solvent, and polymethyl methacrylate is used as a molecular weight standard substance to calculate a corresponding weight average molecular weight. The method can be used.

As a method for producing the resin used in the present invention, known methods can be used without limitation. The columnar object of the present invention has a cross section in which both ends in the longitudinal direction are cut substantially perpendicular to the longitudinal direction, and the cross sectional shape may be a circle, an ellipse, a rectangle, a polygon, or an arbitrary shape. Among them, the columnar object of the present invention is preferably a columnar shape having a circular cross section or an elliptical column shape having an elliptical cross section. FIG. 1 schematically shows a part of the dental frame of the present invention. Each of the three columnar structures is a columnar body, and the columnar body includes a plurality of continuous fibers (in FIG. Symbol 1 is displayed as a black dot in front of the paper surface) and a resin (not shown) existing between the continuous fibers. Sectional area of the pillars of the present invention ^is preferably 0.005mm ² ~3.0mm 2. Further preferred cross-sectional area is 0.01 mm ² 1.5 mm ^2. If the cross-sectional area is too large, the shape followability is lowered. If the cross-sectional area is too small, the preparation time of the dental frame becomes long.

  The ratio of the fiber and the resin in the columnar material of the present invention is preferably 10 to 90% by volume and more preferably 30 to 60% by volume when the entire columnar material is 100% by volume. If the resin content is too small, the resin may not be sufficiently impregnated into the gaps between the fibers, and voids may be generated inside the product, and sufficient shape retention and conformity accuracy may not be obtained during processing. If the ratio is too large, a sufficient reinforcing effect cannot be obtained and the mechanical strength may be lowered.

  The number of continuous fibers (threads) contained in one columnar product of the present invention is preferably 10 to 100,000, and more preferably 100 to 10,000.

  The length in the longitudinal direction of the columnar material of the present invention is not particularly limited, and for example, the columnar material accommodated in a reel can be appropriately cut into a desired length and used. In addition, when a dental frame is manufactured by repeating this while joining the columnar objects folded without being cut, the length becomes extremely long. For example, a preferable length is 5 mm to 1000 mm.

  Other components can be appropriately added to the columnar product of the present invention according to the purpose of use. For example, heat stabilizer, stabilization aid, plasticizer, antioxidant, light stabilizer, ultraviolet absorber, nucleating agent, heavy metal deactivator, flame retardant, lubricant, antistatic agent, X-ray image shadowing agent Pigments, fluorescent agents, bright pigments, fillers, and the like can be added in an addition amount according to the purpose of use.

  The method for producing the columnar product of the present invention is not particularly limited, and any method can be used. In the manufacturing method of a columnar thing, it can classify | categorize into the process of prescribing | regulating the shape of a columnar thing, and the process of impregnating resin to a fiber. These may be performed separately, may be performed simultaneously, the order may be changed, and each process may be repeated. As a resin impregnation method, it may be manufactured through a step of impregnating a resin into a bundle of a plurality of continuous fibers in a molten state, or a liquid compound as a resin raw material and, if necessary, a catalyst with continuous fibers. The bundle may be impregnated by polymerizing and curing. The impregnation may be performed under any environment of normal pressure, pressurization, or reduced pressure. You may preheat a continuous fiber before immersing in resin.

  For example, a columnar article can be produced by bundling a plurality of continuous fibers in the width of a columnar article to form a substantially columnar article shape and impregnating it with a resin. At this time, you may make it impregnate by immersing and pulling up a continuous fiber in the molten resin. Moreover, you may make it impregnate by introduce | transducing a continuous fiber in the molten linear resin flow adjusted so that it might become a predetermined | prescribed compounding ratio. In this case, a columnar product having a desired blending ratio can be prepared without using excess resin. Moreover, after producing a composite of continuous fibers and resin, a columnar article can be produced by cutting the composite in the length direction.

  The frame of the present invention is composed of a structure in which columnar objects made of continuous fibers and resin are joined. Bonding is a state in which the columnar objects are welded or adhered to each other, and a shared layer is formed between the columnar objects by a bonding surface. As a mode of joining, welding by heat melting or adhesion via an adhesive may be used. Since it is easy to form a uniform dental frame, it is preferable to use welding. Moreover, it is preferable that the joint strength of the joint surface is equal to or greater than the strength of the resin alone. In this way, the columnar objects are joined to each other, and the dental frame material created by joining them has various three-dimensional shapes (L-shape, U-shape, etc. described later). However, when viewed microscopically, unlike a normal sheet having a small surface roughness, the surface has a certain uneven structure. The concavo-convex structure on the surface is caused by a structure in which a plurality of columnar objects are joined. For example, when the columnar object is a columnar shape or an elliptical columnar shape, the concavo-convex structure has an angular shape based on the (elliptical) circumferential shape. There is no uneven structure. By having such a unique surface structure, shape conformity is good even if the structure of the tooth abutment is partially uneven or the corner is rounded, etc. A dental frame can be obtained.

  The number of the columnar objects for forming the frame of the present invention cannot be defined unconditionally because of the width of the columnar object or the size of the frame, but it is a structure in which one columnar object is joined while being folded, or 2 to 500 A structure in which the columnar objects are joined is preferable.

  The size of the frame of the present invention is not particularly limited, but is preferably selected from the range of 1 to 100 mm in width, 5 to 100 mm in length, and 0.1 to 20 mm in thickness. The shape of the frame of the present invention varies depending on the use of the dental prosthesis and the influence of individual differences among patients.

  The frame of the present invention is suitable for a dental prosthesis. Producing a prosthesis with the frame of the present invention is not preferable from the viewpoint of appearance and fiber exposure, and is preferably used in combination with other materials such as a laminated material and a covering material. The frame of the present invention preferably occupies a volume of 10% to 70% of the total dental prosthesis. A particularly preferable range is a volume range of 20 to 50%. Specific examples of the laminated material and the covering material include dental restoration materials as shown below, for example, room temperature polymerization resin, back layer material, surface gloss material, composite resin, hard resin, hybrid type hard Resins, glass ceramics, polyamides and polycarbonates, thermoplastic resins such as polyaryl ether ketone, thermosetting resins such as epoxy resins, oxide ceramics such as zirconia and alumina, etc. Because of the approximation, composite resin, hard resin, and hybrid type hard resin are preferable. Moreover, when adhering these laminated materials and coating | covering materials to a frame material, it is preferable to use a suitable adhesive composition, and a well-known dental adhesive composition can be used. The frame material is preferably used so as not to appear on the surface layer in order to obtain a good appearance, and to suppress deterioration in appearance due to fluffing on the surface of the glass fiber prosthesis or irritation to the skin.

  The orientation direction of the columnar object in the frame of the present invention cannot be defined unconditionally because it differs depending on the reinforcement design of the target dental prosthesis, but it is oriented so as to be perpendicular to the stress load direction such as occlusion. It is preferable because the reinforcing effect is high. In addition, it is preferable that the orientation of the frame of the present invention is oriented so as to be parallel to the length direction (the longest direction) of the shape of the frame because the reinforcing effect is high.

  In addition, it is possible to design such that a higher strength is obtained by using a frame formed so that the columnar object exhibits a specific three-dimensional structure. Since the continuous fiber is oriented in the length direction of the columnar material of the present invention, there is an advantage that the orientation of the continuous fiber can be arbitrarily adjusted and the strength can be increased by changing the orientation of the columnar material. For example, a columnar object may be joined in an arc shape or a rectangular shape in the length direction and used as a dental frame. Dental prosthesis is often used as a starting point for fracture where stress in the pulling direction is applied when stress such as occlusal force is applied. The frame is preferable for increasing the strength of the dental prosthesis. As a method for specifying such a stress load site, a method of preparing a model having the same shape in advance and observing the fracture behavior when the stress load is applied, and a method using a finite element method can be mentioned. If the shape of a preferable dental frame is illustrated, the center part of the length direction of the dental frame is bent in a substantially arc shape, the radius of curvature of this approximately arc is 5 to 30 mm, and the columnar body is a dental frame. The dental frame has a width of 2 to 5 mm and a length of 10 to 30 mm.

  Further, the columnar objects may be joined so as to have a structure in which the side surfaces are reinforced by having a wing-like structure bent in parallel with the length direction of the columnar objects. The dental frame comprising the columnar article of the present invention has a feature that the shape followability at the bent portion is good. Examples of the wing-like structure include a three-dimensional structure formed in an L shape, a three-dimensional structure formed in a U-shape, and a three-dimensional structure formed in a box shape in which all side surfaces are surrounded. The most preferable shape is a dental frame formed following a design shape such as a model. Further, a mountain-shaped, valley-shaped, convex-shaped, concave-shaped, repetitive structure of a mountain-valley structure, a repetitive structure of a concavo-convex structure or a three-dimensional structure pattern by a combination of these one direction, vertical and horizontal directions, PCCP shell structure), dimple structure, and the like.

  As a method for producing a dental frame of the present invention, for example, a model having a shape to be produced, for example, a model obtained by collecting and creating an impression of a tooth abutment to be treated is prepared in advance, and a heat source or a solvent is formed thereon. A method of laminating while melting the columnar materials using, and finally cutting the columnar materials. The frame of the present invention may be manufactured manually, but since a precise structure can be easily manufactured, it can be manufactured using computer-aided design (CAD) and computer-aided manufacturing (CAM). preferable. In this case, an optimal arrangement and orientation of the columnar objects may be designed in advance by CAD, and a frame may be produced using CAM based on the three-dimensional model data. As the CAM, an additive manufacturing method can be preferably used. For example, it comprises a head part for discharging a prescribed amount of molten columnar material and a base part for producing a dental frame, and the head part, the base part, or both are tertiary based on CAD data. Move or rotate to the original. A desired three-dimensional structure can be produced by solidifying the columnar material in a molten state on the base portion.

  The dental frame of the present invention is preferably used as a dental prosthesis by being used in combination with other dental prosthesis preparation materials. As a specific embodiment, a dental frame is prepared by the above-described method so as to conform to the shape of the abutment model, and then another dental prosthesis preparation material is laminated on the dental frame. Prosthetics can be created. As other dental prosthesis preparation materials, known materials can be used according to the purpose. For example, known dental curable compositions (composite resins, hard resins, room temperature polymerization resins, etc.), dental mill blanks, dental cutting resin compositions, and dental cutting ceramic compositions known as dental restoration materials It can be used in combination with a material cut into a desired shape, artificial tooth, denture base, denture anchoring material, or back layer material.

  As a specific example, a dental curable composition is generally composed of a polymerizable monomer, a filler (filler), and a polymerization initiator, and these are mixed and kneaded and defoamed. It serves as a dental curable composition. This can be built up on the dental frame of the present invention, and can be appropriately polymerized and cured by photopolymerization, chemical polymerization or the like to produce a dental prosthesis. At this time, pretreatment such as coating treatment, etching treatment, conditioning treatment, corona treatment, plasma treatment, heat treatment, mechanical treatment such as sandblasting is performed so that the dental frame and the dental curable composition are firmly bonded. Or use a primer or an adhesive. A known dental adhesive composition can be used as a primer or an adhesive.

  In the case of a dental mill blank, a dental cutting resin composition, or a dental cutting ceramic composition, it is characterized in that it is hardened and formed into a block shape or a disk shape in advance. This molded body is cut into a shape designed on a computer so as to fit on the dental frame using a CNC or CADCAM device, and the dental prosthesis frame and cutting are processed using an adhesive or cement. A dental prosthesis can be produced by bonding and bonding the objects. As the primer, adhesive, and cement, known dental adhesive compositions can be used. At this time, the above-described pretreatment may be performed. Also, a dental mill blank, a resin composition for dental cutting, and a ceramic composition for dental cutting, in which the dental frame of the present invention is previously integrated at a desired position using a technique such as insert molding. May be used. At this time, the optimal arrangement of the frame of the present invention is preferably performed on software.

  For dental prostheses based on thermoplastic resins, thermoplastic resins include acrylic resins such as polymethylmethacrylate, polycarbonate resins, polyamide resins, polysulfone resins, polyethersulfone resins, polyaryletherketone resins, etc. Can be mentioned. These thermoplastic resins may be prefilled with short glass fibers, whiskers, inorganic fillers, natural minerals, pigments and the like. These are usually molded into a desired shape in advance, or can be obtained in the form of pellets, powders, films, sheets, etc., which are used as raw materials by a method such as compression molding, injection molding, or vacuum molding. Can be processed and formed into a shape. At this time, as an integration method with the dental frame of the present invention, insert molding is performed by placing in advance on a molding die, or compression molding is performed by covering a dental prosthesis frame with a sheet or film. And a method in which a molten thermoplastic resin is poured into a mold in which a dental prosthesis frame is installed and compression molded.

  When the dental frame of the present invention is used in combination with these dental prosthesis preparation materials, the frame of the present invention has a three-dimensional structure in which the pillars are joined. Is formed on the surface, it has an advantage that the adhesive strength is increased by the adhesive composition entering the irregularities.

The location of the dental frame of the present invention in the dental prosthesis may be appropriately determined according to the purpose. However, as in the example described above, the place where the stress is most concentrated in the dental prosthesis is reinforced. It is preferable that they are arranged in the. For example, in the case of a prosthesis in which an occlusal force is applied to the dentition, the length direction of the dental frame coincides with the mesial distal direction of the dentition, and the dental frame surface is perpendicular to the occlusal surface. It is preferable to arrange so that. Further, when compressive stress is applied at a place where the dental prosthesis is present and tensile stress is applied at another place, it is preferable that the dental frame material is disposed at a place where the tensile stress is applied. For example, when bending stress is applied to the bridge of a dental prosthesis by an occlusal force, the stress concentrates on the central pontic part, and in particular, it tends to break from the lower part of the pontic where tensile stress is applied to the connecting part. It is easier to obtain higher durability when the frame is arranged so that it passes through the lower part of the tick. As a method for specifying such a stress load site, a method of preparing a model having the same shape in advance and observing the fracture behavior when the stress load is applied, and a method using a finite element method can be mentioned. Further, similar to the above-described method for producing a dental frame, a dental prosthesis may be produced using computer-aided design (CAD) and computer-aided manufacturing (CAM). The design and production of the dental frame and other dental prosthesis production materials may be designed and produced simultaneously. As the CAM, an additive manufacturing method can be preferably used. For example, the same component is used as a component other than continuous fibers mainly composed of a resin used in a dental frame and a component mainly composed of a resin used in other dental prosthesis preparation materials. After the dental frame is manufactured, a continuous dental prosthesis may be manufactured continuously by stopping the supply of continuous fibers. As the production apparatus for the additive production method, it is preferable to use an apparatus based on a hot melt lamination method because it is easy to supply continuous fibers. In the hot melt lamination method, the columnar material of the present invention can be obtained by directly introducing continuous fibers into the melted resin.
For example, a dental prosthesis can be produced by the following method.

First, a pedestal is formed in a patient's oral cavity by a dentist. For example, the abutment is formed by cutting teeth. Next, an impression of the abutment, adjacent teeth, counter teeth, etc. is taken by the dentist. The impression is taken using an alginate impression material, a silicone impression material, a digital impression device, or the like. Thereafter, a dental technician or dentist creates a model from the acquired impression and digitizes the shape of the model using a scanning machine. Alternatively, a digital model is created from data acquired by a digital impression. Next, digital data of a dental prosthesis is created using design software based on the measurement data. Here, the arrangement of the columnar objects and the shape of the dental frame are designed. Based on the digital data of the prosthesis, processing data for a processing machine such as an additive manufacturing machine is created. Then, a columnar object is installed in a processing machine, and a dental frame is produced. In addition, based on digital data, when producing a dental frame, a hot melt lamination method can be suitably used. Next, pretreatment such as sandblasting or primer is performed on the obtained frame as necessary. As a material for preparing a dental prosthesis, for example, a hard resin is used to build up a crown shape, and the layers are laminated by repeating polymerization and curing to recover the crown shape. Thus, in one aspect of the present invention in which a dental prosthesis is produced, the columnar article of the present invention is provided to a dentist or dental technician, and the dental prosthesis is produced using this dental frame, and the patient It is adhered and bonded in the oral cavity.

  EXAMPLES Hereinafter, although an Example demonstrates this invention still in detail, this invention is not limited to these Examples.

Example 1
A cylindrical columnar body having a cross-sectional area of 0.2 mm ² was produced using glass fibers having a diameter of 10 microns as continuous fibers and ABS resin as a resin. A support model for a lower bridge with a 6-deficient lower jaw is manufactured, and a columnar material that has been partially softened by melting resin by heating is joined to the model along the dentition direction of the abutment. Finally, a dental frame was prepared by cutting the columnar object. This dental frame was excellent in shape followability and highly compatible with the abutment model.

Comparative Example 1
A fiber reinforced resin composite sheet having a thickness of 0.5 mm was prepared using glass fibers having a diameter of 10 microns as continuous fibers and ABS resin as a resin. The surface of the sheet was smooth, unlike the one obtained by joining columnar materials as in Example 1. Prepared an abutment model for the lower bridge with a 6-deficient lower jaw, took the impression of this abutment model with a silicone impression material, and trimmed excess burr and undercut parts to produce a silicone mold . The fiber reinforced resin composite sheet is cut into an appropriate size for producing a dental frame, and the fiber reinforced resin composite sheet softened entirely by heating is placed on the abutment model. Then, pressure contact was made with a silicone mold. This was cooled to room temperature to prepare a dental frame. This dental frame had a bent portion or a folded portion at the bent portion, and was not very compatible with the abutment model.

Claims (6)

A dental frame composed of a structure in which a plurality of columnar objects composed of a plurality of continuous fibers and a resin are joined. The dental frame according to claim 1, wherein the resin is a thermoplastic resin. The dental frame according to claim 1 or 2, wherein the continuous fibers are glass fibers, carbon fibers, or ceramic fibers. Dental frame according to claim 1 wherein the pillars are cylindrical or elliptical cylindrical in cross-sectional area 0.005mm ² ~3.0mm ^2. The dental prosthesis containing the dental frame as described in any one of Claims 1-4. A method for producing a dental prosthesis comprising the step of producing a dental frame according to any one of claims 1 to 4 adapted to a surface shape of an abutment model, and a step of laminating a dental restorative material on the dental frame.

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