JP2018102853A - Denture base, method of manufacturing denture base, plate denture, and method of manufacturing plate denture - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent an adhesive from squeezing out between a socket and an artificial tooth. SOLUTION: A denture base 104 is provided on a partition wall 112 between a plurality of sockets 110 formed adjacently and arranged with artificial teeth and a partition wall 112 between the plurality of sockets 110, and the partition wall 112 is partially lowered. It has a notch 118 and. [Selection diagram] Fig. 2

Description

  The technology of the present application relates to a denture base, a method for manufacturing a denture base, a base denture, and a method for manufacturing a base denture.

  In manufacturing a denture, a resin is dropped as an adhesive on a socket in the denture base, and after the artificial tooth is fitted into the socket, the resin is polymerized to adhere and fix the artificial tooth to the denture base. The resin used in this case is, for example, a mixture of a polymer powder and a monomer liquid, and has a low viscosity immediately after mixing, but there is a resin whose viscosity becomes higher and hardens over time at room temperature.

  There are various methods for adhering artificial teeth to a denture base.

  For example, the artificial tooth arrangement recess formed on the surface of the resin floor is surface-modified, and the resin teeth are bonded to the surface-modified recess via an adhesive, and self as an adhesive (resin). The use of an adhesive type super bond is disclosed (see Patent Document 1).

  In addition, it is disclosed that after applying a primer treatment to the base surface of an artificial tooth, an immediate polymerization resin is applied to the primer-treated surface to form an adhesive layer, and the artificial tooth and the floor are bonded (patent) Reference 2).

JP 2014-155878 A JP 2008-289839 A

  When an artificial tooth is bonded to a denture base socket using an adhesive, if the amount of the adhesive is large, excessive adhesive may protrude from between the socket and the artificial tooth.

  In view of the above facts, the present invention has an object to suppress the protrusion of the adhesive from between the socket and the artificial tooth.

  In the denture base of the present application, a floor portion, a plurality of sockets that are formed adjacent to the floor portion and on which artificial teeth are disposed, and a partition wall between the plurality of sockets are provided with the partition wall partially having a low profile. And a first notch.

  In this application, the protrusion of the adhesive when the artificial tooth is fitted into the socket can be suppressed.

FIG. 1 is a perspective view showing a denture base of the first embodiment. FIG. 2 is a partially enlarged perspective view showing the denture base of the first embodiment. FIG. 3 is a sectional view taken along line 3-3 of FIG. 1 showing the denture base of the first embodiment. 4 is a cross-sectional view taken along line 4-4 of FIG. 1 showing the denture base of the first embodiment. FIG. 5 is a perspective view showing the denture of the first embodiment. FIG. 6 is a perspective view showing a manufacturing process of the denture of the first embodiment. FIG. 7 is a perspective view showing the manufacturing process of the denture of the first embodiment. FIG. 8 is a perspective view showing the manufacturing process of the denture of the first embodiment. FIG. 9 is a perspective view showing a denture base of a comparative example. 10 is a cross-sectional view taken along line 11-11 of FIG. 9 showing a denture base of a comparative example. 11 is a cross-sectional view taken along line 12-12 of FIG. 9 showing a denture base of a comparative example.

(Configuration of denture base and base denture)
Hereinafter, a denture base and a base denture according to an embodiment of the present invention will be described with reference to FIGS.

  As shown in FIG. 5, the denture base 102 includes a denture base 104 and a plurality of artificial teeth 108 fixed to the denture base 104. In addition, although the base denture 102 for upper jaws is shown in FIG. 5, the base denture and denture base for lower jaw may be sufficient.

  As shown in FIGS. 1 and 2, the denture base 104 has a floor 106 that is a part to which the artificial tooth 108 is fixed. The floor portion 106 is formed with a plurality of sockets 110 into which artificial teeth 108 (see FIG. 5) are fitted and fixed.

  At least two of the plurality of sockets 110 are adjacent to each other. In the example shown in FIG. 1, the floor portion 106 is curved as a whole so that all the sockets 110 are arranged in a row. The plurality of sockets 110 are adjacent to each other along the row direction. The inner side of the curve of the floor portion 106 is the lingual side when it is mounted in the oral cavity, and the outer side of the curve is the lip side.

  A partition 112 is formed between adjacent sockets 110. An inner wall 114 is formed on the tongue side of each socket 110, and an outer wall 116 is formed on the lip side of the socket 110. That is, the socket 110 is an area surrounded by the partition wall 112, the inner wall 114, and the outer wall 116.

  As shown in FIG. 3, the partition wall 112 has a first notch 118. In the first notch 118, the height of the partition 112 is partially reduced. In the present embodiment, the first notch 118 is formed in a portion closer to the tongue side (near the inner side of the curve in the arrangement of the plurality of sockets 110) in each of the partition walls 112.

  As shown in FIG. 4, the second cutout 120 is formed in the inner wall 114. In the second notch 120, the height of the inner wall 114 is lower than that of the partition wall 112. The second notch 120 may be partially formed on the inner wall 114 of each socket 110. However, in the example shown in FIGS. 1 and 2, the second notch 120 is entirely formed on the inner wall 114 of each socket 110. A portion 120 is formed. Accordingly, the overall height of the inner wall 114 is lower than that of the partition wall 112.

  In the present embodiment, the first notch 118 and the second notch 120 are continuous. In other words, the first notch 118 is formed near the tongue side in the partition wall 112 and continues to the inner wall 114 in a series, so that the first notch 118 and the second notch 120 are integrally formed. It is a structured.

  The artificial denture 108 is inserted into each of the sockets 110 in the plate denture 102, and is fixed by an adhesive in a fixing process described later.

  In this embodiment, the fixing step is also a step of adhering the artificial tooth to the denture base, that is, an adhering step. As an adhesive (resin) for adhering the artificial tooth to the denture base, for example, an acrylic resin can be used. The acrylic resin is not particularly limited as long as the main adhesion between the denture base and the artificial tooth is possible, and a commercially available product may be used. In other words, the bonding step is preferably a step (hereinafter also referred to as a “main bonding step”) in which the artificial tooth is permanently bonded to the denture base using an acrylic resin. In addition, in this specification, this adhesion | attachment of a denture base and an artificial tooth means that the artificial tooth is being fixed to the denture base to such an extent that it can be used as a denture base.

  Examples of the acrylic resin used in the bonding step include a resin that is polymerized at room temperature (0 ° C. to 35 ° C.), a resin that is polymerized by applying heat, and a resin that is polymerized by light. As a resin that is polymerized at room temperature (0 ° C. to 35 ° C.) or a resin that is polymerized by applying heat, for example, an acrylic resin in which polymerization proceeds at a relatively low temperature (preferably 0 ° C. to 70 ° C.), 70 ° C. An acrylic resin in which polymerization proceeds is mentioned above. In the following, an acrylic resin in which polymerization proceeds at a relatively low temperature (preferably 0 ° C. to 70 ° C.) is referred to as a “specific acrylic resin”.

  As the acrylic resin, a mixture of polymer powder and monomer liquid may be used. When the acrylic resin is injected into the gap between the socket 110 and the artificial tooth 108, the injection is easy if it is in a low viscosity state immediately after mixing. Examples of the polymer powder include acrylic resins such as polymethyl methacrylate, and examples of the monomer liquid include methacrylic esters such as methyl methacrylate and ethyl methacrylate. In addition, the acrylic resin includes, as other components, a diffusion promoting monomer such as 4-META (4-methacryloxyethyl trimellitic anhydride) and a room temperature polymerization initiator such as TBB (tri-n-butylborane) (or A thermal polymerization initiator), a polymerization inhibitor, a colorant, and the like.

  Examples of commercially available acrylic resins include Akron (manufactured by GC Corporation), Para Express Ultra (manufactured by Heraeus Kultzer), Refine Bright manufactured by Yamahachi Dental Industry Co., Ltd., and the like.

  The fixing step may include a step of pre-bonding the artificial tooth to the denture base (hereinafter also referred to as “pre-bonding step”). In this specification, preliminary adhesion means that the artificial tooth is fixed to the denture base to the extent that the positional relationship between the artificial tooth and the denture base is maintained after preliminary adhesion.

  As a method of pre-adhering the artificial tooth to the denture base, for example, using the dental composite resin or acrylic resin, the above resin (dental composite resin or acrylic resin) is injected into at least a part of the concave portion of the denture base. The injected resin is polymerized at normal temperature (0 ° C. to 35 ° C.), heated and polymerized, or polymerized with light (for example, visible light).

Examples of the resin used in the preliminary bonding step include a dental composite resin and an acrylic resin.
Examples of the acrylic resin used in the pre-adhesion step include those similar to the acrylic resin used in the main adhesion step. Among them, a specific acrylic resin (polymerized at a relatively low temperature (preferably 0 ° C. to 70 ° C.)). (Acrylic resin) in which The dental composite resin will be described later.

Teeth that require modification of the tooth arrangement and shape adjustment until the polymerization of the resin used for pre-adhesion progresses (for example, after photocuring in the case of a photopolymerizable resin) by having a pre-adhesion process in the adhesion process. If there is a tooth, the target tooth can be removed.
Moreover, it is preferable that a pre-adhesion process is a process of pre-adhering an artificial tooth to at least one part of the recessed part (socket part) of a denture base from a viewpoint of adjusting the quantity of the resin used for this adhesion | attachment more appropriately.

(Dental composite resin)
The dental composite resin is not particularly limited as long as it allows pre-adhesion between an artificial tooth and a denture base. For example, a composite resin (restoration material) such as a molding restoration material, a crown prosthesis material, and a dental filler. Material), self-adhesive cement, and the like can be used.

  The composite resin includes, for example, dimethacrylate as a matrix resin, and may further include an inorganic filler, a silane coupling agent, and the like. Examples of the dimethacrylate include bisphenol A diglycidyl methacrylate (Bis-GMA), triethylene glycol dimethacrylate (TEGDMA), and urethane dimethacrylate (UDMA).

  As a self-adhesive cement, for example, polymethyl methacrylate (PMMA) or the above-mentioned dimethacrylate is included as a matrix resin, and in addition, an adhesive substance, a filler, or the like may be included.

  Moreover, examples of the composite resin include low-viscosity and low-elastic flowable types and high-viscosity and high-elasticity paste types. From the viewpoint of ease of injection into the denture base recess (socket portion). A flowable type having low viscosity and low elasticity is preferred.

Moreover, it is preferable to use a photopolymerizable composite resin from the viewpoint that the position adjustment of the artificial tooth can be more suitably performed. By using a photopolymerizable composite resin, the composite resin injected into the socket part of the denture base does not harden before light irradiation, so that it is easy to handle and the position of the artificial tooth can be adjusted with high accuracy. In addition, by using a photopolymerizable composite resin, the adhesion after curing (preliminary adhesion) has a relatively weak adhesive force, so it is possible to easily remove the artificial tooth from the denture base. It is easy to re-adhere (preliminary adhesion) between the denture base and the artificial tooth by injecting the composite resin into the socket part of the denture base after removing the base. Therefore, when the shade (color tone) of the artificial tooth is wrong or when the position of the artificial tooth is shifted during the curing operation, the artificial tooth can be easily removed from the denture base even after curing. Therefore, it is easy to perform position adjustment by re-adhesion (preliminary adhesion).
The photopolymerizable composite resin may include, for example, a polymerizable compound such as (meth) acrylic acid ester, an inorganic filler, a photopolymerization initiator, and the like, and further includes a polymerization accelerator. There may be.

  Examples of commercially available composite resins include Beauty Fill II (manufactured by Matsukaze Corporation), Revotech (manufactured by GC Corporation), and the like.

  Note that the artificial tooth 108 may be temporarily fixed to the denture base 104 using a temporary fixing material before the artificial tooth 108 is fixed to the denture base 104 with an adhesive in the fixing step (adhesion step). Even with temporary fixation, the artificial tooth 108 is temporarily fixed to the denture base 104 to such an extent that the positional relationship between the artificial tooth 108 and the denture base 104 is maintained. After temporary fixing, as a fixing step, main bonding may be performed without performing preliminary bonding.

  Examples of the artificial teeth 108 include resin teeth made of acrylic resin, hard resin teeth, and the like. Further, the artificial tooth may contain a filler or the like.

  The material of the denture base 104 is not particularly limited. However, as will be described later, an acrylic resin is preferable because it is suitable for production using a CAD / CAM system and has excellent adhesiveness with a resin tooth made of a commercially available acrylic resin.

  Here, the acrylic resin is selected from the group consisting of a structural unit derived from acrylic acid, a structural unit derived from methacrylic acid, a structural unit derived from an acrylate ester, and a structural unit derived from a methacrylic acid ester. It refers to a polymer comprising at least one species.

  That is, the acrylic resin in this specification is at least one selected from the group consisting of acrylic acid, methacrylic acid, acrylic ester, and methacrylic ester (hereinafter also referred to as “acrylic monomer”). It is a polymer obtained by polymerizing the monomer component containing.

  The acrylic monomer that is at least part of the raw material of the acrylic resin may be a monofunctional acrylic monomer or a polyfunctional acrylic monomer.

  Examples of the monofunctional acrylic monomer include acrylic acid, methacrylic acid, acrylic acid ester having one acryloyl group in one molecule, and methacrylic acid ester having one methacryloyl group in one molecule.

  Examples of the polyfunctional acrylic monomer include acrylic acid esters containing two or more acryloyl groups in one molecule, and methacrylic acid esters containing two or more methacryloyl groups in one molecule.

  As said acrylic ester, acrylic acid alkylester is preferable. Of these, alkyl acrylates having 1 to 4 carbon atoms in the alkyl group contained in the alkyl ester moiety are more preferred, methyl acrylate and ethyl acrylate are more preferred, and methyl acrylate is particularly preferred.

  As the methacrylic acid ester, a methacrylic acid alkyl ester is preferable. Among these, methacrylic acid alkyl esters having 1 to 4 carbon atoms in the alkyl group contained in the alkyl ester moiety are more preferred, methyl methacrylate and ethyl methacrylate are more preferred, and methyl methacrylate is particularly preferred.

  The acrylic resin is preferably a polymer obtained by polymerizing a monomer component containing a monofunctional acrylic monomer from the viewpoint of reactivity and productivity.

  The acrylic resin is obtained by polymerizing a monomer component containing 50% by mass or more (preferably 80% by mass or more, more preferably 90% by mass or more, and further preferably 95% by mass or more) of a monofunctional acrylic monomer. The obtained polymer is more preferable.

  The acrylic resin is particularly preferably a polymer containing a structural unit derived from methyl methacrylate, and most preferably a homopolymer of methyl methacrylate (polymethyl methacrylate, that is, polymethyl methacrylate (PMMA)). It is.

  The acrylic resin may contain rubber from the viewpoint of impact resistance.

  Examples of the rubber include acrylic rubber, butadiene rubber, butadiene-acrylic rubber, butadiene-styrene rubber, and silicone rubber.

  When the acrylic resin contains rubber, the type of rubber may be appropriately selected in consideration of physical properties, but considering the balance of physical properties such as hardness and impact resistance, butadiene rubber or butadiene-acrylic Rubber is preferred.

  The denture base 104 may be colored in a color tone close to gingiva from the viewpoint of aesthetics. For coloring the denture base, for example, pigments, dyes, pigments and the like may be used.

  The denture base 104 may be a denture base for a full denture (so-called full denture) or a denture base for a local denture (so-called partial denture).

  Further, the denture base 104 may be a denture base of a maxillary denture, a denture base of a lower denture, or a set of an upper denture base and a lower denture base. .

  When using a temporary fixing material, as the temporary fixing material, for example, an adhesive material that deforms at 25 ° C. (normal temperature) can be used. Examples of adhesive materials include urethane resins, acrylic resins, silicone resins, vinyl chloride resins, vinyl alcohol resins, vinyl alkyl ether resins, acrylamide resins; natural rubber, silicone rubber, And rubber such as styrene-butadiene copolymer elastomer. Furthermore, as an adhesive material, you may use putty (for example, model production action putty, dental putty), a tack label, flour clay, and an adhesive metal foil tape, for example.

  Putty refers to a material used to fill depressions, cracks, holes and the like. The putty generally contains a pigment, a resin (nonvolatile color former), and a volatile substance.

  Putty is one-component (one-component) or multi-component (two-component) putty such as epoxy putty, polyester putty, silicone putty or modified putty; lacquer putty; instant adhesive putty; gypsum putty; calcium carbonate Putty; photo-curing putty; and the like.

  The tack label is a label in which an adhesive material is provided on the back surface of a base material, and is used by being disposed at a site (for example, near the boundary between a crown and a root) where the adhesive material side is temporarily fixed.

  The material of the substrate is not particularly limited. Examples of the adhesive material provided on the back surface of the substrate include the resin and the rubber.

  Moreover, as a metal foil tape, a well-known adhesive metal foil tape can be used.

  Among adhesive materials, a putty is preferable, a dental putty is more preferable, and a dental silicone putty is still more preferable from the viewpoint of less residual adhesion to the denture after removal of the temporary fixing material. In particular, when a dental putty (preferably a dental silicone putty) is used, the position of the artificial tooth can be easily adjusted because there is little return during deformation. Moreover, the positional relationship between the artificial tooth and the denture base during temporary fixation is easily maintained.

  The said adhesive material may be used individually by 1 type, and may use 2 types together.

  The shape of the temporary fixing material is not particularly limited as long as the artificial tooth can be temporarily fixed to the denture base, and various shapes can be adopted.

(Manufacturing method of denture base and base denture)
Next, the manufacturing method of the denture base 104 and the base denture 102 will be described together with the actions of the denture base 104 and the base denture 102.

  In manufacturing the denture base 104, as an example, a manufacturing system including a CAD (Computer Aided Design system) unit and a CAM (Computer Aided Manufacturing system) unit can be used. This manufacturing system may be referred to as a “CAD / CAM system”.

  The CAD unit designs and manufactures the shape information of the denture base 104 as digital data using a computer based on the 3D surface shape information in the oral cavity and the 3D shape information of the artificial tooth 108. In the present embodiment, the digital data includes the shape information of the first notch 118 and the second notch 120 at all.

  The CAM unit has, for example, a milling machine. And a CAM unit acquires the shape information formed by the CAD unit, and forms the denture base 104 with a milling machine. The milling machine cuts a resin block that is a material of the denture base 104 based on the input shape data of the denture base 104.

  Thus, in the manufacturing method of the denture base of this embodiment, a cutting process (for example, cutting by the above-mentioned milling machine) is included in a part of the process of forming the denture base 104. Thereby, it is possible to eliminate the step of forming the first notch 118 and the second notch 120 by manual work or to minimize the modification of the shape.

  In particular, the first notch 118 can be formed with high accuracy by forming the first notch 118 by cutting.

  When manufacturing a denture base, for example, a denture base without the second notch 120 may be manufactured. In this case, at least the first notch 118 may be cut by a milling machine. When manufacturing the denture base 104 which has the 2nd notch part 120, the 2nd notch part 120 can be formed with high precision by forming the 2nd notch part 120 by cutting.

  In the denture base manufacturing system, the shape information of the denture base 104 obtained by the CAD unit is included. And based on this shape data, a denture base material is shape | molded by the CAM unit, and the denture base 104 is manufactured. For this reason, the denture base 104 of a desired shape can be formed efficiently and with high accuracy.

  In particular, in the present embodiment, the shape information of the denture base 104 includes the shape information of the first notch 118 and the second notch 120. Therefore, the denture base 104 having the first notch 118 and the second notch 120, or the denture base having the second notch 118 and the second notch can be converted into CAD / CAM using a milling machine. You may form only by a process.

  Part of the cutting process may include manual work by an operator.

In manufacturing the denture base 104, a manufacturing system having a 3D printer may be used instead of the milling machine of the manufacturing system described above. Then, the CAM unit acquires the shape information formed by the CAD unit, and forms the denture base 104 by a 3D printer. The 3D printer forms the denture base 104 by laminating materials one by one based on the input shape data of the denture base 104. The 3D printer may employ any of a stereolithography method, a powder sintering lamination method, a heat melting lamination method, and an inkjet method.
In particular, in the present embodiment, the shape information of the denture base 104 includes the shape information of the first notch 118 and the second notch 120. Therefore, for example, the denture base 104 having the first notch 118 and the second notch 120 may be formed only by a CAD / CAM process using a 3D printer.

  In this way, in the step of forming the denture base 104 with a 3D printer, the denture base 104 can be manufactured using only the 3D printer for the first notch 118 and the second notch 120. Thereby, it is possible to eliminate the step of forming the first notch 118 and the second notch 120 by manual work or to minimize the modification of the shape.

  The formation of the first notch 118 may be performed in the step of forming the denture base 104 with a 3D printer (formation step). Thereby, since it is not necessary to form the first notch 118 by cutting or the like, the denture base 104 having the first notch 118 can be easily manufactured.

  When the first notch 118 is formed by a 3D printer, the denture base 104 having the first notch 118 is obtained by using the shape information data of the first notch 118 obtained by the CAD unit. It can be molded efficiently.

  Similarly, the formation of the second notch 120 may be performed in a step (formation step) of forming the denture base 104 using a 3D printer. Thereby, since it is not necessary to form the second notch 120 by cutting or the like, it is easy to manufacture the denture base 104 having the second notch 120.

  When the second notch 120 is formed by a 3D printer, the denture base 104 having the second notch 120 can be efficiently used by using the shape information data of the second notch 120 obtained by the CAD unit. Can be molded.

  However, as in the case of using a manufacturing system having a milling machine, a denture base without the second notch 120 may be produced. In this case, the first notch 118 is provided and the second notch is provided. What is necessary is just to shape | mold the denture base of the shape which does not have the part 120 with 3D printer.

  As a denture base manufacturing system, the CAM unit only needs to have at least one of a milling machine and a 3D printer, and may have both.

  In the denture base 104 thus formed, the artificial tooth 108 is fitted into the socket 110 as shown in FIG. At this time, the artificial tooth 108 may be temporarily fixed to the denture base 104 using a temporary fixing material. By temporary fixing, the artificial tooth 108 is temporarily fixed to the denture base 104 to such an extent that the positional relationship between the artificial tooth 108 and the denture base 104 is maintained.

  The method for temporarily fixing the artificial tooth 108 to the denture base 104 is not particularly limited. For example, the temporary fixing material covers the part including at least one of the artificial tooth and the denture base (for example, the boundary part between the crown and the root), and the outside of the gingiva (lip side, cheek side) or the inside of the gingiva (tongue) Side). It is also possible to adopt a method in which the temporary fixing material is formed in a string shape and arranged so as to straddle from the lip side of the tooth to the lingual side. In addition, when a temporary fixing material is arrange | positioned on the outer side of a gingiva, since an adhesive agent can be inject | poured from an inner side of a gingiva, it is easy to obtain a denture excellent in aesthetics.

  Next, as shown in FIG. 7, the artificial tooth 108 fitted in the socket 110 is bonded and fixed to the denture base 104 with an adhesive (fixing step). For the injection of the adhesive, for example, an injector 22 can be used. The fixing process is also an adhesion process. The bonding process includes a temporary bonding process and a main bonding process, but the temporary bonding process may not be performed if unnecessary.

  As described above, a dental composite resin or an acrylic resin can be used as the resin used in the preliminary bonding step, and an acrylic resin can be used as the resin used in the main bonding step. In the acrylic resin in which the polymer powder and the monomer liquid are mixed, the adhesive can be easily injected if it is in a low viscosity state immediately after mixing.

  In the denture base 104, a second notch 120 is formed in the inner wall 114, that is, the wall located on the tongue side of the socket 110. An adhesive is injected between the socket 110 and the artificial tooth 108 from the second notch 120 using an injector 22 filled with an adhesive.

  The injection amount of the adhesive is, for example, such that the adhesive is slightly visible from between the artificial tooth 108 or between the socket 110 and the artificial tooth 108 due to surface tension.

  Here, FIGS. 9 to 11 show a denture base 74 of a comparative example. In the denture base 74 of the comparative example, a notch is not formed in the partition wall 82. Further, the second notch is not formed in the inner wall 84. Therefore, in the denture base 74 of the comparative example, it may be difficult to inject an adhesive between the socket 80 and the artificial tooth.

  On the other hand, in the denture base 104 of this embodiment, since the second notch 120 is formed in the inner wall 114, the inner wall 114 has a substantially higher height than the inner wall 84 of the denture base 74 of the comparative example. There is a low part. For this reason, the operation | work which inject | pours an adhesive agent between the socket 110 and the artificial tooth 108 is easy. In particular, the denture base 104 of the present embodiment has a structure with a low height in the entire inner wall 114 as in the examples shown in FIGS. 1 and 2, so that the operation of injecting the adhesive is easy.

  Moreover, in the denture base 74 of a comparative example, the notch part is not formed. Therefore, in the denture base 74 of the comparative example, when the amount of the injected adhesive is large, the excessive adhesive protrudes from the socket. Then, it is necessary to remove the protruding adhesive, and the adhesive that cannot be removed may impair aesthetics.

  On the other hand, in the denture base 104 of this embodiment, the first notch 118 is formed in the partition wall 112 at all. When the amount of adhesive injected between the socket 110 and the artificial tooth 108 is large, excess adhesive flows from the first notch 118 to the adjacent socket 110. For this reason, it is possible to suppress the adhesive from protruding from the socket 110.

  Since the adhesive does not protrude from the socket 110 (or the amount that protrudes is small), it is not necessary to remove the protruding adhesive, and the production of the denture 102 is easy. In addition, since the adhesive does not protrude from the socket 110, the denture 102 with superior aesthetics can be obtained.

  The first notch 118 is located on the lingual side, that is, from the inside of the curvature of the socket 110. Therefore, when the adhesive flows through the first notch 118, it flows on the lingual side, so that the protruding denture of the adhesive to the lip side is suppressed, and the denture 102 with excellent aesthetics is obtained.

  The first notch 118 and the second notch 120 may be separated and independent, but are continuous in the above example. Therefore, compared to the structure in which the first notch 118 and the second notch 120 are separated from each other, the first notch 118 and the second notch 120 can be integrally formed, and the formation is easy. is there.

  In the case where a resin that is polymerized at room temperature, a resin that is polymerized by applying heat, a resin that is polymerized by light, or the like is used as the adhesive, the resin is polymerized and the artificial tooth 108 is bonded and fixed to the denture base 104.

  Further, an adhesive is injected into the lingual portion of the denture base 104, particularly the portion where the second notch 120 is formed, and as shown in FIG. The shape may be adjusted. Further, when the temporary fixing agent is used, the temporary fixing material is removed after fixing the artificial tooth 108 to the denture base 104.

  In addition, the method of manufacturing the denture base 104 is not limited to the above manufacturing method. For example, a part of the process of forming the denture base 104 having a desired shape may include manual processing (cutting or the like) using a tool such as a dental handpiece. The manual processing may be performed on the formation of the first notch 118 and the second notch 120, or may be performed on the formation of a portion other than the first notch 118 and the second notch 120. Good.

  6 to 8 show a state in which the artificial tooth 108 is fitted in one socket 110 among the plurality of sockets 110, but in actuality, all the sockets 110 have artificial shapes with corresponding shapes. The teeth 108 are fitted and fixed.

  Hereinafter, the present embodiment will be described more specifically by way of examples. However, the present embodiment is not limited to the following examples unless it exceeds the gist of the present embodiment.

[Example 1]
In Example 1, first, a denture base having a shape in which the first notch 118 and the second notch 120 are not formed by the milling machine is cut by using a manufacturing system having a milling machine (CAD / CAM system). Molded. The inner wall of the denture base was cut using a dental handpiece to form the second notch 120. Subsequently, using the same dental handpiece, a first notch 118 is formed at a position near the lingual side of the partition wall 112, and the second notch 118 is extended to the lingual side to form a second notch. 120 and continuous.

  Next, after a small amount (about 0.1 g) of Beauty Fill II made by Matsukaze Co., Ltd., which is an example of a dental composite resin, is built in each socket 110 as a temporary adhesive, resin teeth made of acrylic resin as artificial teeth 108 Was placed at a predetermined position of the socket 110 on which the temporary adhesive was built up.

  Thereafter, visible light was irradiated for 30 seconds with a visible light irradiator (trade name α Light V, manufactured by Morita Tokyo Seisakusho Co., Ltd.) to cure the temporary adhesive, and the artificial tooth 108 was temporarily bonded to the denture base 104.

  Thereafter, as an adhesive, Paraexpress Ultra manufactured by Heraeus Kultzer, which is an example of an acrylic resin, was poured into the gap between the denture base 104 and the artificial tooth 108 from the second notch 120.

  Thereafter, an adhesive was polymerized to bond the artificial tooth 108 and the denture base 104, and a built-up portion 122 was formed of a resin on the lingual side so as to adjust the denture shape, thereby preparing the denture 102.

  When the plate denture 102 was produced by the above procedure, the second notch 120 was formed in the inner wall 114, and the inner wall 114 was substantially low in height, so that it was easy to pour acrylic resin. Further, since the first notch 118 is formed in the partition wall 112, when the adhesive is poured, a part of the adhesive flows into the adjacent socket 110 through the first notch 118, and the adhesive. Did not overflow. That is, the adhesive did not protrude between the lips and between the teeth, the aesthetics could be maintained, and finishing work using a dental handpiece or the like was easy.

[Example 2]
Using the digital design of the complete denture in which the first notch 118 and the second notch 120 were formed, a cutting process was performed with a milling machine to produce an acrylic resin denture base 104.

  Next, after a small amount (about 0.1 g) of Beauty Fill II made by Matsukaze Co., Ltd., which is an example of a dental composite resin, is built in each socket 110 as a temporary adhesive, resin teeth made of acrylic resin as artificial teeth 108 Was placed at a predetermined position of the socket 110 on which the temporary adhesive was built up.

  Thereafter, visible light was irradiated for 30 seconds with a visible light irradiator (trade name α Light V, manufactured by Morita Tokyo Seisakusho Co., Ltd.) to cure the temporary adhesive, and the artificial tooth 108 was temporarily bonded to the denture base 104.

  Thereafter, as an adhesive, Paraexpress Ultra manufactured by Heraeus Kultzer, which is an example of an acrylic resin, was poured into the gap between the denture base 104 and the artificial tooth 108 from the second notch 120.

  Thereafter, an adhesive was polymerized to bond the artificial tooth 108 and the denture base 104, and a built-up portion 122 was formed of a resin on the lingual side so as to adjust the denture shape, thereby preparing the denture 102.

  When the plate denture 102 was produced by the above procedure, the second notch 120 was formed in the inner wall 114, and the inner wall 114 was substantially low in height, so that it was easy to pour acrylic resin. Further, since the first notch 118 is formed in the partition wall 112, when the adhesive is poured, a part of the adhesive flows into the adjacent socket 110 through the first notch 118, and the adhesive. Did not overflow. That is, the adhesive did not protrude between the lips and between the teeth, the aesthetics could be maintained, and finishing work using a dental handpiece or the like was easy.

Example 3
A denture base made of acrylic resin was prepared using a NexDent resin NexDent Base by a 3D printer (Form 1+, Formlabs). With respect to this denture base, the inner wall 114 was cut using a dental handpiece to form the second notch 120. Subsequently, using the same dental handpiece, the first notch 118 is formed at a position near the lingual side of the partition wall 112, and the second notch 118 is extended to the lingual side to form the second notch 120. And continued.

  Next, after a small amount (about 0.1 g) of Venus Pearl made by Heraeus Kultzer, which is an example of a dental composite resin, is built in each socket 110 as a temporary adhesive, resin teeth made of acrylic resin are used as artificial teeth 108. Was placed at a predetermined position of the socket 110 on which the temporary adhesive was built up.

  Thereafter, visible light was irradiated for 30 seconds with a visible light irradiator (trade name α Light V, manufactured by Morita Tokyo Seisakusho Co., Ltd.) to cure the temporary adhesive, and the artificial tooth 108 was temporarily bonded to the denture base 104.

  Thereafter, as an adhesive, Paraexpress Ultra manufactured by Heraeus Kultzer, which is an example of an acrylic resin, was poured into the gap between the denture base 104 and the artificial tooth 108 from the second notch 120.

  Thereafter, an adhesive was polymerized to adhere the artificial tooth 108 and the denture base 104, and a built-up portion 122 was formed on the lingual side with a resin so as to adjust the denture shape, thereby preparing a denture.

  When the plate denture 102 was produced by the above procedure, the second notch 120 was formed in the inner wall 114, and the inner wall 114 was substantially low in height, so that it was easy to pour acrylic resin. Further, since the first notch 118 is formed in the partition wall 112, when the adhesive is poured, a part of the adhesive flows into the adjacent socket 110 through the first notch 118, and the adhesive. Did not overflow. That is, the adhesive did not protrude between the lips and between the teeth, the aesthetics could be maintained, and finishing work using a dental handpiece or the like was easy.

[Comparative example]
Using a manufacturing system (CAD / CAM system), a denture base having a shape in which the first notch 118 and the second notch 120 were not formed was formed.

  Then, after dropping Paraheas Ultra made by Heraeus Kultzer, which is an example of acrylic resin, into the denture base socket, the resin teeth made of acrylic resin are dropped as artificial teeth. Placed in place on the socket. In order to prevent the artificial teeth from lifting, the denture was continued to be pressed with the finger until the adhesive was hardened to prepare a denture.

  When a plate denture was produced by the above procedure, the adhesive protruded from the socket and the aesthetics were impaired. Moreover, the correction and finishing work by the dental handpiece is complicated.

102 Denture base 104 Denture base 106 Floor 108 Artificial tooth 110 Socket 112 Bulkhead 114 Inner wall 118 First notch 120 Second notch 122 Build-up part

Claims (14)

The floor,
A plurality of sockets that are formed adjacent to the floor and on which artificial teeth are disposed;
A first notch provided in a partition wall between the plurality of sockets, the partition wall partially having a low profile;
Denture base with. A plurality of floor portions are curved with respect to the direction in which the sockets are arranged,
The denture base according to claim 1, wherein the first notch is located at a portion closer to the inside of the curve in the partition wall.   The denture base according to claim 2, further comprising: a second notch portion provided on an inner wall of the socket located on the inner side of the curve and having a lower height than the partition wall.   The denture base according to claim 3, wherein the first notch and the second notch are continuous. A plurality of sockets on which artificial teeth are placed are formed adjacent to the floor,
Forming a first notch partly having a low height between the plurality of sockets located between the sockets;
A method for manufacturing a denture base.   The manufacturing method of the denture base of Claim 5 including the cutting process which cuts denture base material.   The denture base manufacturing method according to claim 6, wherein the first notch is formed in the cutting step.   The manufacturing method of the denture base of Claim 6 or 7 including the CAD / CAM process of cutting denture base material by CAM based on the shape data obtained by CAD.   The denture base manufacturing method according to claim 8, wherein the first notch is formed in the partition wall in the CAD / CAM process.   The manufacturing method of the denture base of any one of Claims 5-9 including the shaping | molding process which shape | molds the said denture base with 3D printer.   The denture base manufacturing method according to claim 10, wherein the first notch portion is formed in the partition wall in the step of forming the socket in the floor portion by the 3D printer.   The method for manufacturing a denture base according to any one of claims 5 to 11, wherein the first notch is formed based on the shape data of the first notch. The denture base according to any one of claims 1 to 4,
An artificial tooth fixed to the socket of the denture base;
A denture with a base. The floor,
A plurality of sockets that are formed adjacent to the floor and on which artificial teeth are disposed;
A first notch provided in a partition wall between the plurality of sockets, the partition wall partially having a low profile;
A denture base having
An artificial tooth fixed to the socket of the denture base;
A method for producing a denture having
A plurality of sockets on which the artificial teeth are disposed are formed adjacent to the floor portion,
Forming a first notch that partially lowers the partition located between the plurality of sockets;
A fixing step of fixing the artificial tooth to the denture base in which the socket is formed;
The manufacturing method of the denture base containing this.