JP6304913B1 - Method for producing dental casting pattern - Google Patents

Abstract

Disclosed is a method for producing a pattern for dental casting, which can eliminate deformation when the pattern is removed from a model, and thus can easily produce a dental prosthesis having high matching accuracy. A method for producing a pattern for dental casting according to the present invention comprises using a first separating material having rubber elasticity on a desired region on the surface of a model produced based on an intraoral impression. One separation layer is formed, a second separation layer is laminated on the first separation layer using an oily second separation material, and a polymerization resin is applied on the second separation layer Or build up to form the base part of the pattern, and after curing the polymerization resin, apply or build up wax on the base part to form the surface layer part of the pattern, thereby laminating the surface part on the base A patterned pattern is produced, and this pattern is used for forming a mold. [Selection] Figure 1

Description

  The present invention relates to a method for producing a dental casting pattern required for forming a mold when a dental prosthesis or a part thereof is produced by casting.

  Conventionally, the lost wax method is generally used as a casting method for producing a dental prosthesis or a part thereof. The lost wax method is to create a pattern of the desired shape with wax, bury this pattern in the mold material, cure the mold material, and then heat the mold material to dissolve and remove the wax. In this method, a mold having a space inside is formed, and molten metal is poured into this space.

  Further, the lost wax method is further divided into two types depending on the object to be manufactured. The first method is a method for producing a metal denture having a large shape and area, and the second method is a method for producing a small shape such as a crown. is there.

The first method is as follows (see, for example, Patent Document 1).
(1) An impression is again taken from the main model prepared based on the intraoral impression to produce a female mold, and a double model of the main model is produced from the female mold using a mold material.
(2) Build up a wax on the double model to create a pattern of the desired shape.
(3) The double model is used as the lower mold while the pattern is attached. The lower mold is covered with a cylindrical burying ring, and the mold material is put into the burying ring so that the pattern is buried in the mold material. After that, the mold material is cured.
(4) The mold material is heated to dissolve and remove the wax, thereby forming a mold having a space inside.
(5) Pour molten metal into the space, and after the molten metal cools and solidifies, the mold is broken and the cast body is collected.

The second method is as follows (for example, see Patent Document 2).
(1) A wax having a desired shape is built up on the model made based on the intraoral impression.
(2) After removing the pattern from the model and burying it in the mold material, the mold material is cured.
(3) The mold material is heated to dissolve and remove the wax, thereby forming a mold having a space inside.
(4) Pour molten metal into the mold space, and after the molten metal cools and solidifies, the mold is broken and the cast body is collected.

However, the first method has the following problems.
(1) Since it is necessary to make the pattern larger in consideration of the casting shrinkage that occurs in the casting process, the double model is not made the same size as the main model, but taking into account the hardening expansion of the double model It is necessary to make a double model larger than the main model, but this is uncertain because it depends on the experience and skill of the creator. And if it doesn't work, the accuracy of the dental prosthesis will be low, so it will take a lot of time to work on the subsequent process (bending adjustment, adjustment work such as polishing) to satisfy this. .
(2) It is necessary to produce a female mold and a multiple model, and the use of a large embedding ring corresponding to the multiple model increases the amount of mold material used, resulting in an increase in manufacturing cost.

  Therefore, if the metal floor and the clasp of the metal base denture are prepared separately and then combined to prepare the metal base denture, the metal floor pattern and the clasp pattern can be easily removed from the model. Therefore, an invention that can be manufactured by the second method, that is, it is not necessary to manufacture a female mold and a multiple model has also been proposed (Patent Document 3).

However, the second method has the following problems.
(1) Since the wax is soft, a force may be applied to the pattern when the pattern is removed from the model, and the pattern may be slightly deformed. And, if the pattern is deformed, the dental prosthesis becomes less fit, so much time is spent on the work after the casting process (adjustment work such as bending adjustment and polishing of the cast body) after the casting process. Must be applied.
(2) If a polymerization resin is used instead of wax, the hardness of the pattern increases, so that deformation when removing the pattern can be suppressed (Patent Document 3). However, the effects of deformation cannot be ignored for those having a large shape / area of the object to be produced. This is especially true for parts with a small thickness, such as metal floors, and parts with a small thickness or thin parts.

Japanese Patent Laid-Open No. 5-168652 Japanese Patent Laid-Open No. 10-248858 JP 2013-255627 A

  Therefore, the present invention has been made in view of such circumstances, can eliminate the deformation when the pattern is removed from the model, and thus enables easy production of a dental prosthesis having high conformity accuracy. It is an object to provide a method for producing a pattern for dental casting.

  In order to eliminate or minimize the adjustment work of the post-process after the casting process (adjustment work such as bending adjustment and polishing of the cast body), the inventor can suppress the deformation when removing the pattern from the model. As a result of earnest research on whether or not it is possible to use the first separation material having rubber elasticity between the model and the pattern, after using a polymer resin that is sufficiently harder than wax as the pattern material. The present inventors have found the fact that a laminated separation layer of a second separation layer using one separation layer and an oily second separation material may be formed.

That is, the method for producing a dental casting pattern according to the present invention is as follows.
On the desired region of the surface of the model made based on the intraoral impression, a first separation layer is formed using a first separation material having rubber elasticity,
On the first separation layer, a second separation layer is laminated and formed using an oily second separation material,
On the second separation layer, a polymerization resin is applied or built up to form a pattern base,
After curing the polymerization resin, on the base portion, apply or build up wax to form the surface layer portion of the pattern,
Thereby, a pattern in which the surface layer portion is laminated on the base portion is produced,
This pattern is used for forming a mold.

Only the first separation layer or only the second separation layer cannot suitably suppress the deformation of the pattern, and after forming the second separation layer, the first separation layer is formed on the second separation layer. Even when the layers are laminated, the deformation of the pattern cannot be suitably suppressed (the pattern may not even be removed from the model in the first place), and the present inventor explained the mechanism according to the present invention as follows. Consider.
The pattern shrinks as the polymerized resin cures and is intimately in close contact with the separating layer. For this reason, when the pattern is peeled from the separation layer, a minute relative displacement of the pattern with respect to the separation layer applies a force to the fragile portion (tip portion or thin portion) of the pattern, and the pattern is likely to be deformed at the portion. Therefore, if a material having rubber elasticity is used as the separation layer, when the pattern is peeled from the separation layer, the separation layer is slightly elastically deformed by the rubber elasticity and absorbs a minute relative displacement of the pattern. No force is applied to the fragile part, and deformation in the part is less likely to occur. However, by itself, as described above, since the pattern shrinks due to the curing of the polymerization resin and is closely in close contact with the separation layer, the pattern is difficult to peel off. If this is forcibly peeled off, the weak part of the pattern is deformed, or the entire pattern is deformed by bending stress applied to the pattern. Therefore, a second separation layer is formed on the first separation layer, that is, between the first separation layer and the pattern, and slipping property or peeling property is formed between the first separation layer and the pattern. Is granted. Accordingly, the pattern can be peeled from the separation layer without applying an excessive force, that is, without causing deformation of the pattern.

  Here, as one aspect of the method for producing a pattern for dental casting according to the present invention, the first separating material is a latex-based separating material, and the second separating material is a petrolatum-based separating material.

  According to such a configuration, suitable rubber elasticity is obtained by the latex-based separating material, and suitable slipping property or peelability is obtained by the petroleum jelly-based separating material. The latex-based separating material refers to a separating material composed of latex or a separating material mainly composed of latex, and the petrolatum-based separating material refers to a separating material composed of petrolatum or a separating material composed mainly of petrolatum. Say.

  Moreover, as another aspect of the method for producing a dental casting pattern according to the present invention, the average thickness of the second separation layer is smaller than the average thickness of the first separation layer.

  If the thickness of the separation layer is large, the fitting accuracy of the dental prosthesis is affected. However, the first separation layer needs to have a certain thickness so as to exhibit the above function due to rubber elasticity. Therefore, the average thickness of the first separation layer is preferably larger than the average thickness of the second separation layer, and the average thickness of the second separation layer is preferably smaller than the average thickness of the first separation layer. . For example, the average thickness of the first separation layer is preferably 5 μm or more and 20 μm or less, more preferably 5 μm or more and 15 μm or less, further preferably 8 μm or more and 15 μm or less, and the average thickness of the second separation layer is 1 μm or more. 5 μm or less is preferable, and 1 μm or more and 3 μm or less is more preferable.

  Furthermore, as another aspect of the method for producing a pattern for dental casting according to the present invention, the average thickness of the base portion of the pattern is larger than the average thickness of the surface layer portion of the pattern.

  There are two main reasons for adopting a laminated structure in which a surface layer portion made of wax is laminated on a base portion made of a polymerized resin as a pattern. One is that the polymerized resin is difficult to process when cured, and the surface cannot be scraped to finish the pattern into a desired shape, but this can be easily done with wax. The other is that polymerized resin has poor surface roughness after curing, but wax has good surface roughness, and can finish the surface of the pattern, and thus the surface of the dental prosthesis or its parts. That is the point. Therefore, the average thickness of the surface layer portion of the pattern is sufficient if it can secure at least the surface shaving allowance and can improve the surface roughness of the pattern surface. On the other hand, the base part of the pattern is the main part of the pattern for maintaining the rigidity of the entire pattern. Therefore, it is preferable that the average thickness of the base portion of the pattern is larger than the average thickness of the surface layer portion of the pattern. For example, the average thickness of the base portion of the pattern is preferably 2 times or more, and more preferably 3 times or more the average thickness of the surface layer portion of the pattern.

  As described above, according to the method for producing a pattern for dental casting according to the present invention, it is possible to eliminate deformation when the pattern is removed from the model, and thus it is possible to easily produce a dental prosthesis having high conformity accuracy. It becomes possible.

FIG. 1 is a flowchart of a method for producing a dental prosthesis or a part thereof including the method for producing a dental casting pattern according to the present invention as a part of the process. FIG. 2 is an explanatory view showing a method for producing a dental casting pattern according to the first embodiment of the present invention. FIG. 2 (a) shows the left half of the model (upper jaw model) viewed from the lower jaw side. FIG. 2B is a diagram showing a state in which the first separation layer is formed on a desired region on the surface of the model, and is a perspective view corresponding to FIG. 2 (c) is a view showing a state in which a second separation layer is formed on the first separation layer, and is a perspective view corresponding to FIG. 2 (a). FIG. 3 is an explanatory view of the same, and FIG. 3A is a diagram showing a state in which a base portion of a pattern is formed by applying or building up a polymerization resin on the second separation layer. 2 (a) is a perspective view corresponding to 2 (a), and FIG. 3 (b) is a view showing a state in which a surface layer portion of the pattern is formed by applying or building up wax on the pattern base portion. 3 (c) is a cross-sectional view of the laminated structure of FIG. 3 (b), and FIG. 3 (d) is a perspective view of the pattern removed from the model. FIG. 4 is an explanatory view showing a method for producing a dental casting pattern according to the second embodiment of the present invention. FIG. 4 (a) is a front view of the main model (abutment model), and FIG. b) is a cross-sectional view showing a state in which a pattern is produced on the model, and FIG. 4C is a front view showing a state in which a first separating material is applied on a desired region on the surface of the model. 4 (d) is a diagram showing a state in which the first separation material is dried to form the first separation layer, and is a front view corresponding to FIG. 4 (c). FIG. 5 is a view showing an upper jaw model imitating the upper jaw to which the partial denture according to 1 of application example 1 of the method for producing a dental casting pattern according to the present invention is attached, and FIG. A side view of the upper jaw model, FIG. 5B is a perspective view of the left half of the upper jaw model seen from the lower jaw side, and FIG. 5C is a plan view of the left half of the upper jaw model seen from the lower jaw side. FIG. 6 is a diagram showing a partial denture according to 1 of the application example 1, in which FIG. 6 (a) is a plan view of the closed partial denture from the lower jaw side, and FIG. 6 (b) is FIG. 6C is a plan view of the partial denture in the open state as viewed from the lower jaw side, FIG. 6C is a plan view of the partial denture in the open state as viewed from the upper jaw side, and FIG. 6D is a plan view of FIG. It is the sectional view on the AA line of FIG.6 (c). 7 is a view showing a state in which the partial denture according to 1 of the application example 1 is attached to the upper jaw model, and FIG. 7A is a side view corresponding to FIG. ) Is a perspective view corresponding to FIG. 5B, and FIG. 7C is a plan view corresponding to FIG. 5C. FIG. 8 is an explanatory diagram showing a procedure for mounting the partial denture according to 1 of the application example 1 on the dentition, and the inner engagement member and the outer engagement member are placed in the dentition with the partial denture open. It is a figure which shows the state moved to inside and outside. FIG. 9 is a diagram illustrating the state where the inner engagement member is engaged with the inside of the dentition. FIG. 10 is a diagram illustrating the state where the partial denture is closed. FIG. 11 is a diagram illustrating the state in which the partial denture is closed and attached to the dentition. FIG. 12 (a) is a diagram showing an upper jaw model imitating the upper jaw to which the partial denture according to 2 of application example 1 of the method for producing a dental casting pattern according to the present invention is attached, and the upper jaw model is taken as the lower jaw. FIG. 12B is a plan view seen from the side, and is a view showing a state in which the partial denture according to 2 of the application example 1 is mounted on the upper jaw model, and is a plan view corresponding to FIG. . FIG. 13A is a view showing an upper jaw model simulating the upper jaw to which the partial denture according to 3 of application example 1 of the method for producing a dental casting pattern according to the present invention is attached, and is shown on the left side of the upper jaw model. FIG. 13B is a perspective view of the half viewed from the lower jaw side, and FIG. 13B is a view showing a state in which the partial denture according to 3 of the first application example is attached to the upper jaw model, and is a perspective view corresponding to FIG. FIG. FIG. 14A is a view showing a state in which the partial denture according to 3 of the same application example 1 is attached to the upper jaw model, and is a perspective view of the left half of the upper jaw model seen from the lower jaw side, FIG. These are the perspective views corresponding to Fig.14 (a) which made the partial denture based on 3 of the application example 1 into the open state. FIG. 15 is an explanatory diagram illustrating a procedure for mounting the partial denture according to 3 of the application example 1 on the dentition, and the inner engagement member and the outer engagement member are placed in the dentition with the partial denture open. It is a figure which shows the state moved to inside and outside. FIG. 16 is a diagram illustrating the state where the inner engaging member is engaged with the inside of the dentition. FIG. 17 is a diagram illustrating the state where the partial denture is closed. FIG. 18 is a diagram illustrating the state where the partial denture is closed and attached to the dentition. FIG. 19A is a plan view of an upper jaw model simulating the upper jaw to which the partial denture according to 1 of application example 2 of the method for producing a dental casting pattern according to the present invention is attached, as seen from the lower jaw side, FIG. (B) is a figure which shows the state which mounted | wore the upper jaw model with the partial denture based on 1 of the example 2 of application, Comprising: It is a top view corresponding to Fig.19 (a). 20 (a) is a perspective view of the upper jaw model as seen from the right side of the lower jaw, and FIG. 20 (b) is a view showing a state where the partial denture according to 1 of the application example 2 is attached to the upper jaw model. It is a top view corresponding to Fig.20 (a). FIG. 21A is a perspective view of the upper jaw model as seen from the left side of the lower jaw, and FIG. 21B is a view showing a state where the partial denture according to 1 of the application example 2 is attached to the upper jaw model. FIG. 22 is a plan view corresponding to FIG. 22A is a perspective view of the partial denture according to 1 of the application example 2 as seen from the front side, and FIG. 22B is a plan view of the partial denture according to 1 of the application example 2 as seen from the upper jaw side. It is. 23A is a cross-sectional view taken along line AA in FIG. 19B, FIG. 23B is a cross-sectional view taken along line BB in FIG. 19B, and FIG. It is CC sectional view taken on the line of b). 24A is a plan view of an upper jaw model simulating the upper jaw to which the partial denture according to 2 of application example 2 of the method for producing a dental casting pattern according to the present invention is attached, as seen from the lower jaw side, FIG. (B) is a figure which shows the state which mounted | wore the upper jaw model with the partial denture based on 2 of the example 2 of application, Comprising: It is a top view corresponding to Fig.24 (a). 25 (a) is a cross-sectional view taken along line AA in FIG. 24 (b), FIG. 25 (b) is a cross-sectional view taken along line BB in FIG. 24 (b), and FIG. It is CC sectional view taken on the line of b). FIG. 26A is a plan view of an upper jaw model simulating the upper jaw to which the partial denture according to 1 of application example 3 of the method for producing a dental casting pattern according to the present invention is attached, as seen from the lower jaw side, FIG. (B) is a figure which shows the state which mounted | wore the upper jaw model with the partial denture based on 1 of the example 3 of application, Comprising: It is a top view corresponding to Fig.26 (a). 27A is a front view of the upper jaw model as viewed from the front, and FIG. 27B is a diagram showing a state in which the partial denture according to 1 of the application example 3 is attached to the upper jaw model. It is a front view corresponding to (a). 28A is a perspective view of the upper jaw model as seen from the right side of the lower jaw, and FIG. 28B is a view showing a state in which the partial denture according to 1 of Application Example 3 is attached to the upper jaw model. It is a perspective view corresponding to 28 (a). FIG. 29A is a plan view of a partial denture according to 1 of Application Example 3 in the mounted state (first state) as seen from the lower jaw side, and FIG. 29B is a bent state (second state). It is the top view which looked at the partial denture based on 1 of the same application example 3 made from the lower jaw side. 30A is a cross-sectional view of a partial denture according to 1 of Application Example 3 at a location corresponding to line AA in FIG. 26B, and FIG. 30B is a cross-sectional view of B in FIG. FIG. 30C is a cross-sectional view of the partial denture according to 1 of the same application example 3 at a location corresponding to the line B, and FIG. 30C shows the partial denture according to 1 of the same application example 3 in the bent state (second state). FIG. 31 is a cross-sectional view corresponding to FIG. 31A is a cross-sectional view taken along the line BB of FIG. 26B, FIG. 31B is a cross-sectional view taken along the line CC of FIG. 26B, and FIG. It is DD sectional view taken on the line of b). FIG. 32A is a plan view showing a state in which the first engaging member of the partial denture according to 1 of Application Example 3 in the bent state (second state) is engaged with the inside of the dentition; FIG. 32B is a plan view showing a state where the second engagement member rotates to engage with the inside of the dentition and the partial denture according to 1 of the application example 3 is attached to the dentition. .

  Hereinafter, an outline of a method for producing a dental prosthesis or part thereof including the method for producing a pattern for dental casting according to the present invention as a part of the process will be described with reference to FIG.

  First, in S <b> 1, the dentist takes an impression by taking a mold of a dentition in a patient's mouth using, for example, silicon. Next, in S <b> 2, the dentist creates this model using plaster from the impression.

  When the dental technician deposits the model made in S2 from the dentist, in S3, the first separation is performed on the desired region of the surface of the model using a first separation material having rubber elasticity. Form a layer. In the present embodiment, a latex-based separating material is used as the first separating material, and it is uniformly applied on a desired region on the surface of the model using an applicator such as a round brush, a flat brush, or a brush. When the separation material is dried, the first separation layer is obtained. Since the thickness of the separating material decreases when dried, the average thickness of the first separated layer after drying is 5 μm or more and 20 μm or less, more preferably 5 μm or more and 15 μm or less, and even more preferably 8 μm or more and 15 μm or less. In addition, the first separating material is applied thicker than that. However, the average thickness of the first separation layer is not limited to these ranges, and can be appropriately selected.

  In applying the first separating material, it is preferable to wet the applicator with water in advance. If air is contained in the applicator, the air reacts with the latex and the latex solidifies and cannot be applied smoothly, resulting in a very uneven thickness of the first separation layer. Because it becomes.

  In addition, the application is preferably performed once. Even if it is applied twice, if the first separator applied at the first time is not dry, the first separator applied at the first time will be fooled at the second application. Waiting for the applied first separating material to dry, the second application is performed.

  After waiting for the first separating material to dry, the dental technician forms a second separating layer using an oily second separating material on the first separating layer in S4. In the present embodiment, petrolatum is used as the second separation material, and is applied uniformly on the first separation layer using an applicator such as a brush or brush to obtain the second separation layer. The second separation material is applied so that the average thickness of the second separation layer is 1 μm or more and 5 μm or less, more preferably 1 μm or more and 3 μm or less. However, the average thickness of the second separation layer is not limited to these ranges, and can be appropriately selected.

  Next, in S5, the dental technician applies or builds up a polymerization resin on the second separation layer to form a pattern base. In this embodiment, an immediate polymerization resin is used as the polymerization resin, and is applied or built on the second separation layer using an applicator such as a round brush, a flat brush, a brush, or a building tool, The base part of the pattern is obtained.

  After waiting for the polymerization resin to harden, the dental technician applies or builds up wax (thermoplastic oil) on the base portion of the pattern to form the surface layer portion of the pattern in S6. In the present embodiment, various types of waxes commonly used in dental technicians are used, and are applied or applied onto the base portion of the pattern using an applicator such as a round brush, flat brush, or brush, or a building tool. It is built up and the surface part of the pattern is obtained. Then, if necessary, the dental technician cuts the surface of the surface layer portion of the pattern, adjusts the shape, and finishes the pattern into a final shape.

  There are two main reasons for using wax as well as polymerization resin. One is that the polymerized resin is difficult to process when cured, and the surface cannot be scraped to finish the pattern into a desired shape, but this can be easily done with wax. The other is that polymerized resin has poor surface roughness after curing, but wax has good surface roughness, and can finish the surface of the pattern, and thus the surface of the dental prosthesis or its parts. That is the point.

  Next, in S7, the dental technician removes the pattern from the model and collects the pattern. As described above, since the laminated separation layer of the first separation layer having rubber elasticity and the oily second separation layer is formed between the pattern and the main model, the pattern is not deformed. The pattern can be peeled from the separating layer. And since the 1st separated layer and the 2nd separated layer may remain partially in the extract | collected pattern, these are removed. In addition, you may make it perform the process of scraping the surface of the surface layer part of a pattern mentioned above, and finishing a pattern in a final shape, after removing a pattern from this model.

  S3 to S7 are steps corresponding to the method for producing a dental casting pattern according to the present invention. When the pattern is collected, the dental technician embeds the pattern in the mold material in S8, and after the mold material is cured, in S9, the mold material is heated to dissolve and remove the pattern. Thereby, a mold having a space corresponding to the shape of the pattern is formed inside. Then, in S10, the dental technician pours molten metal into the mold space, and the molten metal cools and solidifies, and in S11, the mold is broken by sandblasting or the like to collect a cast. These steps are not different from the normal lost wax method.

  Next, in S12, the dental technician performs adjustment operations such as bending adjustment and polishing on the cast body, if necessary. If the casting body already has the accuracy of fitting as a dental prosthesis or a part thereof, if the adjustment work is unnecessary (YES in S13), or if the casting body is a dental prosthesis or If the accuracy of fitting as the part comes (S13 is YES), the process is completed.

  Thus, according to the method for producing a dental prosthesis or a part thereof according to the present embodiment, as described above, since the part is not deformed, the cast body is already a dental prosthesis or the part thereof in the casting process. It has high accuracy as a part. Therefore, the adjustment work of the post-process after the casting process can be eliminated or minimized. As a result, the production efficiency of the dental prosthesis or its parts can be greatly improved, and it is possible to quickly produce the dental prosthesis or its parts without requiring a high level of skill and experience.

<First embodiment>
Here, the manufacturing method of the pattern for dental casting which concerns on 1st embodiment of this invention is demonstrated, referring FIG.2 and FIG.3. This embodiment relates to a method for producing a pattern for casting the engagement member 20 inside the partial denture 1 according to 1 of application example 1 described later.

  The dental technician keeps the model 50 (see FIG. 2A) from the dentist. In this model 50, the left fifth tooth and the left sixth tooth of the upper jaw are missing, and the dental technician has left the second incision 52 except the left first incisor 52 to prosthesis the missing part 51. Partial dentures to be mounted on the dentition of the left incisor 53, the left third canine 54, the left fourth molar 55 and the left seventh molar 58.

  First, the dental technician uniformly applies a first separating material having rubber elasticity, such as a latex-based separating material, onto a desired region of the surface of the model 50, and then the separating material is dried. One separation layer 60 is obtained (see FIG. 2B). In the present embodiment, in the present model 50, the root half on the inner surface of the left second incisor 53 and the left third canine 54, the inner surface and the distal surface of the left fourth molar 55, the defect, The first separating material is applied on the surface of the alveolar ridge of the portion 51, the inner surface of the left molar 7 58, the mesial surface, and the distal surface.

  Next, the dental technician uniformly applies an oily second separating material such as petrolatum on the first separating layer 60 to obtain the second separating layer 61 (see FIG. 2C). ). The second separation material may be applied to the surface of the main model 50 by protruding the first separation layer 61, or may not be strictly applied to the entire surface of the first separation layer 60. Absent.

  Next, the dental technician applies or builds up a polymerization resin such as an immediate polymerization resin on the second separation layer 61 to form the pattern base 62 (see FIG. 3A). Then, after waiting for the polymerization resin to harden, the dental technician applies or builds up wax on the base portion 62 to correspond to the shape of the engaging member 20 inside the partial denture 1 to be produced. The surface layer portion 63 of the pattern is formed so as to have a shape (see FIG. 3B). Then, if necessary, the dental technician cuts the surface of the surface layer portion 63 of the pattern, adjusts the shape, and finishes the pattern 64 into a final shape.

  Next, the dental technician removes the pattern 64 from the main model 50 and collects the pattern 64 (see FIG. 3D). Here, a laminated separation layer of a first separation layer 60 having rubber elasticity and an oily second separation layer 61 is formed between the pattern 64 and the main model 50 (FIG. 3C). For example, even if the pattern 64 has a three-dimensionally complicated shape, the pattern 64 can be peeled from the separation layers 60 and 61 without causing the pattern 64 to be deformed.

<Second Embodiment>
Next, a method for producing a dental casting pattern according to the second embodiment of the present invention will be described with reference to FIG. The present embodiment relates to a method for producing a pattern for casting a crown (dental crown) to be applied to a thinned portion by cutting the surface of a remaining tooth.

  The dental technician takes this model (abutment model) 50 (see FIG. 4A) from a dentist. Then, the dental technician uniformly applies a first separating material having rubber elasticity such as a latex-based separating material on a desired region of the surface of the model 50 (see FIG. 4C), The separation material is dried to obtain the first separation layer 60 (see FIG. 4D). In the present embodiment, in the abutment model 50, the first portion is formed on the surface of the abutment model 50 that is scraped away from the margin 50b (the boundary between the crown and the remaining teeth, that is, the opening edge of the crown). A separating material is applied.

  Next, the dental technician uniformly applies an oily second separating material such as petrolatum on the first separating layer 60 to obtain the second separating layer 61. Thereafter, the dental technician applied or built up a polymerized resin, such as an immediate polymerized resin, on the second separating layer 61 to create a pattern base 62 and waited for the polymerized resin to cure. Thereafter, wax is applied or built on the base portion 62 to form a surface layer portion 63 of the pattern so as to have a shape corresponding to the shape of the crown to be produced (see FIG. 4B). Then, if necessary, the dental technician cuts the surface of the surface layer portion 63 of the pattern, adjusts the shape, and finishes the pattern 64 into a final shape.

  Next, the dental technician removes the pattern 64 from the main model 50 and collects the pattern 64. Here, since the laminated separation layer of the first separation layer 60 having rubber elasticity and the oily second separation layer 61 is formed between the pattern 64 and the main model 50, the overall size is small. Even if the pattern 64 is thin (particularly the margin portion), the pattern 64 can be peeled off from the separation layers 60 and 61 without causing deformation of the pattern 64.

  In addition, the pattern 64 is difficult to be pulled out (hard to remove) in the upright portion 50a of the main model 50 that has almost no gradient with respect to the pattern 64 pulling direction. Since the separation layer 60 has a certain thickness (see FIG. 4D), the pattern 64 is easy to remove (easy to remove). On the other hand, since the thickness of the first separation layer 60 after the first separation material is dried is small in the margin portion 50b of the present model 50 (see FIG. 4D), the fit in the margin portion of the pattern 64 is achieved. The accuracy is extremely high.

  In addition, the production method of the pattern for dental casting which concerns on this invention is not limited to the said embodiment, A various change is possible in the range which does not deviate from the summary of this invention.

  For example, in the above-described embodiment, a latex-based separator is used as the first separator. However, the first separating material is not limited to this. For example, any material having rubber elasticity such as a silicone rubber-based separator can be used as the first separator.

  Moreover, in the said embodiment, a petrolatum-type separation material is used as a 2nd separation material. However, the second separating material is not limited to this. For example, any oil-based separator such as a silicone oil-based separator or cocoa butter can be used as the second separator.

  Moreover, in the said embodiment, an immediate polymerization resin is used as a polymerization resin. However, the polymerization resin is not limited to this. For example, a room temperature polymerization resin, a heat polymerization resin, a photopolymerization resin, or the like can be used.

  Moreover, in the said embodiment, a pattern is produced using this model in order to reduce manufacturing cost. However, the present invention is not limited to this. For example, as in the prior art, it is not excluded from the scope of the present invention to produce a multiple model and to create a pattern using this multiple model.

  Moreover, in the said embodiment, a 1st separating material and a 2nd separating material are supplied to a model by application | coating. However, the present invention is not limited to this. For example, known means such as spraying can be employed.

  Further, it is not essential that the formation range of the first separation layer 60 and the formation range of the second separation layer 61 coincide with the build-up range of the polymerization resin, for example, it is wider than the build-up range of the polymerization resin. Also good.

  Moreover, in the said embodiment, a metal is used as a material of a casting. However, as the material of the cast body, in addition to metal, all materials used for dental prosthesis or parts thereof such as ceramic and resin can be adopted.

  Moreover, in the said embodiment, the pattern by which the surface layer part was laminated | stacked on the base part is produced on a model. However, the present invention is not limited to this. For example, a pattern base is formed on a model, removed from the model, and then a wax is applied or built on the base to form a surface layer of the pattern to complete the pattern. May be.

  Next, an example of a method for producing a dental casting pattern according to the present invention will be described together with a comparative example.

Example 1
The engagement member 20 inside the partial denture 1 according to 1 of the application example 1 described later is a production target. Latex-based separator (trade name “Pottery paste (liquid masking agent)” (manufactured by Gut Electric Co., Ltd.)) as the first separator, petrolatum-based separator (trade name “ointment”) as the second separator The base layer white petrolatum (manufactured by Maruishi Pharmaceutical Co., Ltd.) was used to form a laminated separation layer using these separation materials. Then, an instant polymerization resin (trade name “GC Pattern Resin” (manufactured by GC Corporation)) was used as the polymerization resin, and a pattern was produced three times under the same conditions. For convenience of the experiment, the step of forming the surface layer portion of the pattern using wax was omitted. The same applies to the following comparative examples.

(Comparative Example 1)
Similarly, the engagement member 20 was a production target. As the separating material, only the same latex-based separating material as in Example 1 (trade name “Pottery paste (liquid masking agent)” (manufactured by Gut Electric Co., Ltd.)) is used to form a single-layer separating layer using one kind of separating material. did. The use amount and application range of the separating material were the same as the use amount and application range of the latex-based separating material of Example 1. Thereby, it can be considered that the average thickness of the separation layer of Comparative Example 1 is the same as the average thickness of the first separation layer of Example 1. Then, as the polymerization resin, the same immediate polymerization resin as in Example 1 (trade name “GC Pattern Resin” (manufactured by GC Corporation)) was used, and a pattern was produced three times under the same conditions.

(Comparative Example 2)
Similarly, the engagement member 20 was a production target. As the separating material, only the same petrolatum-based separating material (trade name “ointment base white petrolatum” (manufactured by Maruishi Pharmaceutical Co., Ltd.)) as in Example 1 was used to form a single-layer separating layer of one kind of separating material. The usage amount and application range of the separating material were the same as the usage amount and application range of the petroleum jelly-based separating material of Example 1. Thereby, it can be considered that the average thickness of the separation layer of Comparative Example 2 is the same as the average thickness of the second separation layer of Example 1. Then, as the polymerization resin, the same immediate polymerization resin as in Example 1 (trade name “GC Pattern Resin” (manufactured by GC Corporation)) was used, and a pattern was produced three times under the same conditions.

(Comparative Example 3)
Similarly, the engagement member 20 was a production target. As a separating material, only a sodium alginate-based separating material (trade name “Acrosep” (manufactured by GC Corporation)) was used, and a single-layer separating layer was formed using one kind of separating material. The use amount and application range of the separating material were the same as the use amount and application range of the latex-based separating material of Example 1. Thereby, it can be considered that the average thickness of the separation layer of Comparative Example 3 is the same as the average thickness of the first separation layer of Example 1. Then, as the polymerization resin, the same immediate polymerization resin as in Example 1 (trade name “GC Pattern Resin” (manufactured by GC Corporation)) was used, and a pattern was produced three times under the same conditions.

(Comparative Example 4)
The conditions are the same as those of Example 1 except that the first separation layer is formed after the second separation layer is formed first, so that the formation order of the stacked separation layers is reversed.

  As can be seen from Table 1, in Comparative Examples 1 to 4, some patterns cannot be removed from the model in the first place. Even if the pattern can be removed from the model, the pattern is broken or deformed. It was something to do. However, according to the method for producing a pattern for dental casting according to the present invention, it is possible to remove the pattern from the model without causing deformation, and thus it is possible to easily produce a dental prosthesis having high conformity accuracy. I understand that

(Example 2)
The crown according to the second embodiment was a production target. Latex-based separator (trade name “Pottery paste (liquid masking agent)” (manufactured by Gut Electric Co., Ltd.)) as the first separator, petrolatum-based separator (trade name “ointment”) as the second separator The base layer white petrolatum (manufactured by Maruishi Pharmaceutical Co., Ltd.) was used to form a laminated separation layer using these separation materials. Then, an instant polymerization resin (trade name “GC Pattern Resin” (manufactured by GC Corporation)) was used as the polymerization resin, and a pattern was produced three times under the same conditions. For convenience of the experiment, the step of forming the surface layer portion of the pattern using wax was omitted. The same applies to the following comparative examples.

(Comparative Example 5)
A crown having the same shape was used as a production target. As the separating material, only the same latex-based separating material as in Example 2 (trade name “Pottery paste (liquid masking agent)” (manufactured by Gut Electric Co., Ltd.)) is used to form a single-layer separating layer using one kind of separating material. did. The use amount and application range of the separating material were the same as the use amount and application range of the latex-based separating material of Example 2. Thereby, it can be considered that the average thickness of the separation layer of Comparative Example 5 is the same as the average thickness of the first separation layer of Example 2. The same immediate polymerization resin as that of Example 2 (trade name “GC Pattern Resin” (manufactured by GC Corporation)) was used as the polymerization resin, and a pattern was produced three times under the same conditions.

(Comparative Example 6)
A crown having the same shape was used as a production target. As the separating material, only the same petrolatum-based separating material as in Example 2 (trade name “Ointment base white petrolatum” (manufactured by Maruishi Pharmaceutical Co., Ltd.)) was used to form a single-layer separating layer of one kind of separating material. The use amount and application range of the separation material were the same as the use amount and application range of the petroleum jelly-based separation material of Example 2. Thereby, it can be considered that the average thickness of the separation layer of Comparative Example 6 is the same as the average thickness of the second separation layer of Example 2. The same immediate polymerization resin as that of Example 2 (trade name “GC Pattern Resin” (manufactured by GC Corporation)) was used as the polymerization resin, and a pattern was produced three times under the same conditions.

(Comparative Example 7)
The conditions are the same as in Example 2 except that the first separation layer is formed after the second separation layer is formed first, so that the formation order of the stacked separation layers is reversed.

  As can be seen from Table 2, in Comparative Examples 5 to 7, many patterns could not be removed from the model in the first place. This is presumably because the pattern is firmly fixed to the model due to the shrinkage accompanying the curing of the polymerization resin. However, according to the method for producing a pattern for dental casting according to the present invention, it is possible to remove the pattern from the model without causing deformation, and thus it is possible to easily produce a dental prosthesis having high conformity accuracy. I understand that

<Application example>
Next, by using the method for producing a pattern for dental casting according to the present invention, production efficiency is greatly improved, and it is possible to produce quickly with stable quality without requiring high skill and experience. An application example of a dental prosthesis will be described.

<Application example 1>
The partial denture according to Application Example 1 is
An artificial tooth placed in the missing part of the dentition,
A pair of engaging members configured to support the artificial teeth and be configured to be openable and closable; in the open state, the tooth rows are inserted and separated; and in the closed state, the teeth are engaged from the inside and the outside;
A lock structure for releasably fixing the closed state of the pair of engagement members,
At least one of the pair of engaging members includes a first engaging portion that engages with an inclined portion that inclines in a direction that widens toward the tooth root of each of the plurality of teeth in the dentition. And a second engaging portion that engages with an undercut portion that is inclined to the opposite side of the inclined portion of at least one tooth in the dentition.

  According to such a configuration, when mounting the partial denture on the dentition, first, the pair of engaging members are opened. As a result, the pair of engaging members are separated so that the tooth row can be inserted, and in this state, the pair of engaging members are moved in and out of the tooth row. Then, the pair of engaging members are closed. As a result, the pair of engaging members engage with the inner side and the outer side of the dentition, and the lock structure works to attach the partial denture to the dentition.

  When the partial denture is mounted on the dentition, i) the partial denture provided with the first engaging portion and the second engaging portion on either one of the pair of engaging members. In this case, the first engaging portion and the second engaging portion are engaged with either the inner side or the outer side of the tooth row, and the other engaging member of the pair of engaging members is the tooth row. The pair of engaging members are engaged so as to wrap the teeth at least three points from the inner side and the outer side, and ii) the first engaging portion and In the case of a partial denture in which the second engaging portion is provided on any of the pair of engaging members, the first engaging portion and the second engaging portion are on the inside and outside of the dentition. By engaging with each other, the pair of engaging members engage so as to wrap the teeth at least four points from the inside and outside. Therefore, the partial denture is firmly attached to the dentition without moving in any of the inner and outer directions (horizontal direction) of the dentition, the occlusal direction (vertical direction), and the rotation direction with respect to the dentition.

  In addition, while the partial denture is mounted, the first engaging portion is engaged with each of the plurality of teeth in the dentition that is inclined in a direction that widens toward the root. Therefore, the occlusal force applied to the artificial tooth does not substantially act on the alveolar ridge in the defect portion and is distributed to a plurality of teeth.

  Further, while the partial denture is mounted, the second engagement portion is engaged with an undercut portion that is an inclined portion inclined to the opposite side of the inclined portion of at least one tooth in the dentition. . Therefore, the partial denture does not come out of the dentition.

  On the other hand, when removing the partial denture from the dentition, by releasing the lock structure and opening the pair of engagement members, the pair of engagement members can be separated from the dentition and the partial denture can be removed. .

  “Inner side” means the side where the tongue is located (tongue side) when the teeth are used as a reference, and “outer side” means the front teeth (one or two incisors) when the teeth are used as a reference. And 3 canine teeth), it refers to the side with the lips (lip side), and the back teeth (4th to 7th molars) refers to the side with the cheeks (cheek side).

  Here, as one aspect of the partial denture according to Application Example 1, at least one of the pair of engaging members includes a concave portion having a shape along the surface of each of the plurality of teeth. A configuration in which the first engaging portion is formed at the end and the second engaging portion is formed at the end of the recess on the root side can be employed.

  According to such a configuration, the concave portion comes into surface contact with the surface of the tooth so as to wrap the surface of the tooth (No. 4 to No. 7 molar) that has a drum shape by having the maximum bulge portion in the middle in the vertical direction of the crown. The partial denture is more firmly attached to the dentition.

  The “occlusion side” means the side closer to the incision in the occlusion direction (vertical direction) if it is an anterior tooth, and the occlusal surface (the surface where the upper dentition and the lower dentition are engaged with each other if it is the back tooth. More specifically, it means a side close to the surface between the raised cusps at the top of the tooth), and “the root side” means the side away from the incision and the occlusal surface.

  Further, as another aspect of the partial denture according to Application Example 1, any one of the pair of engagement members is a second engagement portion that engages with an undercut portion of at least one tooth in the dentition. It is possible to employ a configuration comprising:

  According to this configuration, when the partial denture is mounted on the dentition, the first engagement portion and the second engagement portion of either one of the pair of engagement members are inside the dentition or The second engaging portion of the other engaging member of the pair of engaging members engages either the inner side or the outer side of the tooth row while engaging with either one of the outer sides. Thereby, a pair of engaging member engages so that a tooth may be wrapped at at least three points from the inside and the outside. Therefore, the partial denture is firmly attached to the dentition without moving in any of the inner and outer directions (horizontal direction) of the dentition, the occlusal direction (vertical direction), and the rotation direction with respect to the dentition. And since the 2nd latching | locking part is engaging with both the inner side and the outer undercut part of a tooth | gear while mounting | wearing with a partial denture, a partial denture does not slip out of a dentition.

  Further, as another aspect of the partial denture according to Application Example 1, the artificial tooth is divided into a first divided body and a second divided body on the dividing surface, and the first divided body is a pair of engagements. While being provided in any one of the engaging members, the second divided body may be provided in any other engaging member of the pair of engaging members.

  According to this configuration, in the open state of the pair of engaging members, the first divided body and the second divided body are separated at the dividing surface. On the other hand, in the closed state of the pair of engaging members, when the partial denture is mounted on the dentition, the first divided body and the second divided body are matched to express a function as an artificial tooth.

  In this case, the first divided body includes a lateral surface on the occlusal side, a lateral surface on the root side having a shape along the alveolar ridge in the defect portion on the side opposite to the lateral surface on the occlusal side, an inner surface of the artificial tooth, and an artificial surface. A base portion having an elevation surface opposite to the inner surface of the tooth, wherein the second divided body is an occlusal surface of the artificial tooth, and an occlusion of the first divided body on the side opposite to the occlusal surface of the artificial tooth An occlusal portion having a root side lateral surface forming a first divided surface with the side lateral surface, an outer surface of the artificial tooth, and an upright surface of the first divided body on the side opposite to the outer surface of the artificial tooth And a configuration including an outer portion having an upstanding surface forming a second dividing surface.

  According to this configuration, in the open state of the pair of engaging members, the first divided body and the second divided body are the first divided surface (the lateral surface on the occlusion side of the first divided body and the second divided body). Separation is performed at the root surface of the divided body) and the second divided surface (the first divided body and the second divided body). On the other hand, in the closed state of the pair of engaging members, when the partial denture is attached to the dentition, the first divided body and the second divided body have the first divided surface and the second divided surface. Match to match. Thereby, the artificial tooth which made the inner surface of the 1st division body, the outer surface of the 2nd division body, and the occlusal surface the main surface is comprised.

  Moreover, the structure provided in the division surface of a 1st division body and a 2nd division body is employable as a lock structure.

  According to such a configuration, when the pair of engaging members is changed from the open state to the closed state and the pair of engaging members engage with the inside and the outside of the dentition, the pair of engaging members are closed by the lock structure. Once fixed, the partial denture is attached to the dentition. On the other hand, when removing the partial denture from the dentition, the lock structure is released to open the pair of engaging members, the pair of engaging members are separated from the dentition, and the partial denture is removed.

  As described above, according to the partial denture according to Application Example 1, by using the remaining tooth as it is, it is not necessary to cut the remaining tooth or the alveolar bone like a crown bridge or an implant, and the partial denture can be removed. Can be installed. Moreover, according to the partial denture which concerns on the application example 1, since the occlusal force concerning an artificial tooth is not burdened to an alveolar ridge via a denture base, it distributes and bears to several residual teeth, Therefore a partial denture Can solve various problems.

<1 of Application Example 1>
Hereinafter, a first specific example (part 1 of application example 1) of the partial denture according to application example 1 will be described with reference to FIGS. The partial denture according to 1 of the application example 1 is attached to the upper dentition. Here, for convenience, an upper jaw model imitating the upper jaw is used and this is considered as an actual upper jaw. .

  As shown in FIGS. 5 to 7, the partial denture 1 according to 1 of the application example 1 is for prosthesis of the missing part 51 of the left fifth tooth and the left sixth molar, and the left first incisor 52 is used as a prosthesis. Except for the left incisor 53, the left third canine 54, the left fourth molar 55, and the left seventh molar 58.

  The partial denture 1 supports the artificial tooth 10 disposed in the defect part 51 and the artificial tooth 10 and is configured to be openable and closable. In the open state, the dental dentition is inserted and separated, and in the closed state, the dentition And a pair of engaging members 20 and 30 engaged from the inside and the outside.

  The artificial tooth 10 is divided at the dividing surface 11 into a first divided body 12 and a second divided body 13, and the first divided body 12 and the second divided body 13 coincide with the artificial tooth 10. Become. In Application Example 1, the two adjacent molars on the left side and the left side are missing, and the artificial tooth 10 is provided with these two teeth integrally. Therefore, each of the 1st division body 12 and the 2nd division body 13 is provided corresponding to two adjacent molars of the left side 5th and the left side 6th.

  The first divided body 12 includes a lateral surface 12a on the occlusion side, a lateral surface 12b on the root side in a shape along the alveolar ridge in the defect portion 51 on the side opposite to the lateral surface 12a on the occlusion side, and an artificial tooth 10 A base portion 12A having an inner side surface 12c and an upright surface 12d opposite to the inner side surface 12c of the artificial tooth 10 is provided.

  The second divided body 13 includes a first divided surface including an occlusal surface 13a of the artificial tooth 10 and a lateral surface 12a on the occlusal side of the first divided body 12 opposite to the occlusal surface 13a of the artificial tooth 10. An occlusal portion 13A having a lateral surface 13b on the root side that forms 11a, an outer surface 13c of the artificial tooth 10, and an elevation surface 12d of the first divided body 12 on the opposite side of the outer surface 13c of the artificial tooth 10. And an outer portion 13B having an upright surface 13d that forms the second divided surface 11b, and has an L shape in a cross-sectional view.

  The second divided body 13 is laminated on the base portion 13C, which is a portion excluding the surface layer of the occlusal portion 13A and the outer portion 13B, and is laminated on the base portion 13C, and has a white color that is the same color as the teeth, and is visible on the external appearance. It is a laminated structure with the well-known coating part 13D. Therefore, the occlusal surface 13a of the artificial tooth 10 and the outer surface 13c of the artificial tooth 10 are outer surfaces of the coating portion 13D, and the lateral surface 13b and the standing surface 13d on the root side are inner surfaces of the base portion 13C.

  The first divided body 12 and the second divided body 13 having such a configuration are matched so that the first divided surface 11a and the second divided surface 11b are combined. The artificial tooth 10 having the inner surface 12c, the outer surface 13c of the second divided body 13 and the occlusal surface 13a as main surfaces is configured.

  The divided surface 11 between the first divided body 12 and the second divided body 13, more specifically, the second divided surface 11 b that intersects the contact / separation direction of the first divided body 12 and the second divided body 13. Is provided with a lock structure 14 for releasably fixing the matching state of the first divided body 12 and the second divided body 13.

  The lock structure 14 is formed on one of the rising surfaces 12d of the first divided body 12 or the rising surface 13d of the second divided body 13 and on the other rising surface. And engaging protrusions. When the first divided body 12 and the second divided body 13 coincide with each other, the engaging projection is elastically deformed into the engaging concave portion and is locked. Moreover, when the 1st division body 12 and the 2nd division body 13 isolate | separate, the latching to the engagement recessed part by an engagement protrusion is released | released, and a lock | rock is cancelled | released.

  The first divided body 12 is provided integrally with the inner engagement member 20, and the second divided body 13 is provided integrally with the outer engagement member 30. In other words, the inner engagement member 20 includes arm portions 21 and 22 extending from the first divided body 12 to the mesial and distal directions, and the outer engagement member 30 is closer to the second divided body 13. Arms 31 and 32 extending in the center and in the distal direction are provided. Note that “middle” refers to the direction approaching the midline (between the first incisor on the right side and the first incisor on the left side), and “centrifugation” refers to the direction away from the midline.

  In Application Example 1, the mesial side arm portion 21 of the inner engagement member 20 has three adjacent teeth of the left second incisor 53, the left third canine 54, and the fourth left molar 55. The distal side arm portion 22 of the inner engaging member 20 is engaged with the inner side of the left-side No. 7 molar 58 and a part on the distal side. It has a possible bent shape.

  Further, in Application Example 1, the mesial side arm portion 31 of the outer engagement member 30 has three adjacent teeth of the left second incisor 53, the left third dog tooth 54, and the left fourth molar 55. The distal side arm portion 32 of the outer engagement member 30 is engaged with the outer side of the left seventh molar 58 and the other side of the distal side. It has a bendable shape.

  The pair of engaging members 20 and 30 are rotatably connected by hinge portions 40 provided at the distal ends of the distal sides of the centrifugal side, that is, the distal ends of the distal arm portions 22 and 32, respectively. Thereby, a pair of engaging members 20 and 30 are comprised so that opening and closing is possible in the open state which spaces apart so that a tooth row can be inserted, and the closed state which engages a tooth row from the inside and the outside. In addition, when a pair of engagement members 20 and 30 open too much, the handleability at the time of attaching a partial denture to a dentition will worsen. Therefore, the hinge part 40 is formed so that the pair of engaging members 20 and 30 do not open more than a predetermined angle (FIGS. 6B and 6C show the maximum opening angle). .

  The inner engaging member 20 includes first engaging portions 23,... That engage with inclined portions that are inclined so as to extend toward the root of each corresponding tooth, and on the opposite side of the inclined portion. The tooth | gear with the undercut part which inclines is provided with the 2nd engaging part 24 and ... engaged with the said undercut part. In Application Example 1, 1, the inner engagement member 20 corresponds to the teeth of the left second incisor 53, the left third canine 54, the left fourth molar 55, and the left seventh molar 58. The second engaging portion 24 is provided for each of the left third canine tooth 54, left left fourth molar 55 and left seventh molar 58 having the first engaging portion 23 and having an undercut portion. Is provided.

  The outer engaging member 30 includes second engaging portions 34 that engage with the undercut portion. In Application Example 1, 1, the outer engagement member 30 is composed of the left second incisor 53, the left third canine 54, the left fourth molar 55 and the left seventh molar 58 having an undercut portion. A second engaging portion 34 is provided for each tooth.

  As shown in FIG. 11, the inner engagement member 20 includes a concave portion 25 having a shape along the inner surface of each tooth. The first engagement portion 23 is formed on the occlusal side (lower side in the drawing) of the recess 25. The second engagement portion 24 is formed on the tooth root side (the upper side in the drawing) of the recess 25.

  More specifically, the inner engagement member 20 is in a state where the root edge end portion is in contact with the edge of the inner gum 59 and no gap is formed in order to prevent plaque from adhering to the tooth neck of the tooth. So as to engage the inside of the dentition. Therefore, the second engaging portion 24 is formed at the end edge portion on the root side of the inner engaging member 20 (end portion on the root side of the recess 25), and mainly engages with the tooth neck portion.

  Further, with respect to the molars 55 and 58, the inner engagement member 20 has a height dimension that covers almost the entire inner surface of the tooth. Therefore, the first engagement portion 23 is formed at the end portion on the occlusion side of the inner engagement member 20 (the end portion on the occlusion side of the recess 25). However, when the first engagement portion 23 advances to the occlusal surface of the molars 55 and 58, the lower jaw teeth and the first engagement portion 23 come into contact with each other, and the meshing of the teeth changes. For this reason, the first engaging portion 23 is engaged with a portion of the molars 55 and 58 that is inclined in a direction that widens toward the root of the molar, such as a portion that does not cover the occlusal surface, for example, a portion slightly on the root side of the occlusal surface. Match.

  The outer engaging member 30 is mainly disposed on the outer surface of the gum 59. Therefore, the second engagement portion 34 is formed at the occlusal end edge portion of the outer engagement member 30. However, the molars 55 and 58 have a wider undercut portion than the front teeth and are in a deep position, so that it is not necessary to pay much attention to aesthetics. Therefore, the end edge part on the occlusion side of the outer engaging member 30 may extend beyond the tooth neck part to the outer side surface of the tooth (for example, around the maximum ridge).

  Although not shown in the drawings, as an aesthetic treatment, a portion of the outer surface of the outer engagement member 30 that is applied to the gingiva 59 has a skin color that is the same color as that of the gingiva, and is a known coating that looks like gingiva in appearance. In addition, a portion of the outer surface of the outer engagement member 30 that covers the teeth 55 and 58 is provided with a well-known coating having a white color that is the same as that of the teeth and making it appear externally. The

  As the material of the partial denture 1, in addition to metals such as cobalt, chromium, molybdenum alloy and gold alloy, synthetic resins such as polyetheretherketone (PEEK) resin and ceramics such as zirconia can be used. In 1 of the application example 1, the base portion 12A of the first divided body 12 of the artificial tooth 10 and the inner engagement member 20 are made of metal integrally formed by casting using a metal material, and the artificial tooth The base portion 13C of the tenth second divided body 13 and the outer engaging member 30 are also made of metal integrally molded by casting using the same metal material.

  The partial denture 1 according to 1 of the application example 1 has the above-described configuration. Next, a procedure for mounting the partial denture 1 on the dentition will be described.

  First, the pair of engaging members 20 and 30 are opened. As a result, the pair of engaging members 20 and 30 are separated so that the tooth row can be inserted. In this state, the pair of engaging members 20 and 30 are moved in and out of the tooth row as shown in FIG.

  When the pair of engaging members 20 and 30 are moved to the corresponding positions, next, as shown in FIG. 9, the inner engaging member 20 is moved to the dentition side to engage the dentition from the inner side. Moreover, the artificial tooth 10 arrange | positions the 1st division body 12 in the regular position on the alveolar ridge in the defect | deletion part 51 of a dentition by this operation. Note that the outer engaging member 30 may be first brought into contact with the tooth row instead of the inner engaging member 20.

  Next, as shown in FIG. 10, the outer engaging member 30 is moved to the dentition side to close the pair of engaging members 20 and 30, and as shown in FIG. Engage with the dentition from the outside. At this time, the pair of engaging members 20 and 30 are fixed in the closed state by the lock structure 14, and the partial denture 1 is attached to the dentition.

  Here, in the partial denture 1 according to Application Example 1, both the first engagement portion 20 and the second engagement portion 30 whose inclination directions are opposite to each other are formed on the inner engagement member 20. Has been. Therefore, when the partial denture 1 is in the closed state, that is, in the mounting form, the second engagement portion 30 cannot interfere with the dentition and attach the partial denture 1 to the dentition. However, the partial denture 1 according to 1 of the application example 1 employs an openable / closable type in which a tooth row can be inserted and separated. Thereby, the 1st engaging part 20 and the 2nd engaging part 30 can be engaged from a lateral direction with respect to a dentition, and the partial denture 1 can be easily mounted | worn on a dentition.

  When the partial denture 1 is mounted on the dentition, the plurality of recesses 25 of the inner engagement member 20 are surface-engaged with the inner side surface of the dentition, and the plurality of first portions of the inner engagement member 20 are arranged. .. And the plurality of second engaging portions 24 engage with the inside of the dentition. In addition, the plurality of second engaging portions 34 of the outer engaging member 30 engage with the outside of the tooth row. Thereby, a pair of engaging members 20 and 30 engage so that a dentition may be wrapped from the inner side and the outer side. Therefore, the partial denture 1 according to 1 of the application example 1 does not move in the dentition without moving in any of the inner and outer directions (horizontal direction) of the dentition, the occlusal direction (vertical direction), and the rotation direction with respect to the dentition. Can be attached firmly.

  And the partial denture 1 which concerns on 1 of the application example 1 is a metal rigid body, and is hard to produce bending and a deformation | transformation. Therefore, even if it is used for a long time, the engaged state does not weaken or become uneven. Thereby, the user can use a partial denture with a comfortable wearing feeling.

  Moreover, according to the partial denture 1 which concerns on 1 of the application example 1, while mounting | wearing with a dentition, several 1st engaging parts 23 and ... are several teeth (1 of the application example 1) in a dentition. , The left second incisor 53, the left third canine 54, the left fourth molar 55 and the left seventh molar 58) are inclined in the direction of spreading toward the root. It is engaged with the inclined part. Therefore, the occlusal force applied to the artificial tooth 10 does not substantially act on the alveolar ridge in the defect portion 51 and can be distributed to a plurality of teeth. As a result, hard foods that require a strong occlusal force held by partial dentures cannot be eaten, and the load is unbalanced, so the burden on the remaining teeth is large and the life of the remaining teeth is shortened. Can be solved.

  And the partial denture 1 which concerns on 1 of the application example 1 is a metal rigid body, and is hard to produce bending and a deformation | transformation. Therefore, even if it is used for a long time, the engaged state does not weaken or become uneven. As a result, there is no problem in that the effect of dispersion of the occlusal force is biased, and the occlusal force acts excessively on a specific tooth to shorten the life of the tooth.

  Moreover, the partial denture 1 which concerns on 1 of the application example 1 is mounted | worn using a residual tooth as it is. This eliminates the need to cut the remaining teeth in order to align the partial dentures like a crown bridge. Therefore, it has a very large effect for the user that the loss of the healthy tooth can be prevented.

  Moreover, in the partial denture 1 which concerns on 1 of the application example 1, the artificial tooth 10 becomes a split type. For this reason, for example, even if a defect such as the coating portion 13D that is more brittle than metal is missing, cracked, or peeled off from the base portion 13C occurs over time, the hinge portion 40 is removed and only the outer engagement member 30 side is repaired. It becomes possible. Thereby, material costs can be reduced, processing costs can be reduced, and maintenance costs can be suppressed.

  Moreover, even if the artificial tooth 10 is divided, the occlusal side surface 12a which is a substantially flat surface of the first divided body 12 and the root side which is also the substantially flat surface of the second divided body 13 are used. The lateral surface 13b is in abutment with the surface. Therefore, the occlusal force applied to the occlusal surface 13a of the second divided body 13 is surely applied to the first divided body 12 via the second divided body 13, the lateral surface 13b on the root side, and the lateral surface 12a on the occlusal side. Communicated. The occlusal force transmitted to the first divided body 12 is reliably dispersed and transmitted to the plurality of remaining teeth via the inner engagement member 20 and the plurality of first engagement portions 23. Thereby, the occlusal force concerning the artificial tooth 10 can be reliably borne by the plurality of remaining teeth. The occlusal side surface 12a of the first divided body 12 and the lateral surface 13b on the root side of the second divided body 13 are substantially flat surfaces. The lateral surface 12 a on the occlusion side is slightly inclined downward toward the second divided body 13, and the lateral surface 13 b on the tooth root side of the second divided body 13 is directed toward the first divided body 12. And slightly tilted up. Thereby, when making a pair of engaging members 20 and 30 into a closed state, the 1st division body 12 and the 2nd division body 13 can be made to correspond smoothly.

  Moreover, in the partial denture 1 which concerns on 1 of the application example 1, the width | variety in the up-down direction of the outer engagement member 30 is narrower than the width | variety in the up-down direction of the inner engagement member 20. FIG. Moreover, the outer engagement member 30 is unevenly distributed on the gingival side. Thereby, the partial denture 1 which concerns on 1 of the application example 1 is excellent in aesthetics. However, if it is a user who does not care about that, or if it can be made inconspicuous by performing an aesthetic treatment by coating, the outer engagement member 30 can be made wider in the vertical direction, The engagement force may be increased by arranging more on the outer surface of the tooth.

  Moreover, in the partial denture 1 which concerns on 1 of the application example 1, the lock structure 14 is not a site | part like the front-end | tip part on the opposite side to the hinge part 40 of a pair of engaging members 20 and 30, for example, the artificial tooth 10 The first divided body 12 and the second divided body 13 are provided. When the lock structure is provided on the distal end side of the engagement members 20 and 30, even if the engagement members 20 and 30 are slightly bent, if the distance from the hinge portion 40 is increased, there is a slight influence on the lock structure. There is concern that the structure will be inadvertently removed. However, in the partial denture 1 according to Application Example 1, the lock structure 14 is provided between the first divided body 12 and the second divided body 13 of the artificial tooth 10 close to the hinge portion 40. There is no such problem. Moreover, since the lock structure 14 is provided in the comparatively wide division surface 11 in the artificial tooth 10, the freedom degree of design is high. Moreover, since the lock structure 14 is hidden by the dividing surface 11, it is very hygienic.

<Application example 1-2>
Next, a second specific example (part 2 of application example 1) of the partial denture according to application example 1 will be described with reference to FIG.

  The partial denture 1 according to 2 of Application Example 1 is for prosthetic restoration of the missing part 51 of the upper right right 6th and right 7th molars and the missing left 51th and left 7th molars 51. Are attached to the dentition of all teeth (right side 1 to 5 and left side 1 to 5 teeth 52 to 56).

  Basically, the partial denture 1 according to 1 of Application Example 1 is also provided on the right side, and is the same as the configuration in which both the left and right inner engagement members 20 and 20 are extended and connected. Since the missing part 51 is the innermost part, there is no pair of distal arm parts 22 and 32 as in the partial denture 1 according to Application Example 1, but the first divided body 12 and the second part of the artificial tooth 10 This is a point at which the divided body 13 is hinge-coupled by the hinge portion 40.

  In the second application example 2, the outer engagement member 30 extends to the right and left second incisors 53 as in the first application example. The first engaging portions 24,... Are provided for all remaining teeth 52 to 56 (the right and left first and second teeth 52, 53 are auxiliary engaging portions. ).

  The partial denture 1 according to 2 of the application example 1 has the same effect as the partial denture 1 according to the 1 of the application example 1.

  In addition, when only one of the right side and the left side is the innermost missing part 51, the right side of the partial denture 1 according to 2 of Application Example 1 at any part of the first to third front teeth 52 to 54 Or the partial denture 1 of the form which lost either one of the left side is employable.

<3 of Application Example 1>
Next, a third specific example (part 3 of application example 1) of the partial denture according to application example 1 will be described with reference to FIGS. 13 to 18.

  As shown in FIGS. 13 and 14, the partial denture 1 according to Application Example 3 is for prosthesis of the missing part 51 of the upper left molar of the upper jaw, the third left canine 54 and the fourth left The molars 55, the left fifth molar 56 and the left seventh molar 58 are mounted.

  Basically, the configuration is the same as that of the partial denture 1 according to the first application example 1, but the difference is that in the partial denture 1 according to the first application example 1, the axis of the hinge portion 40 is in the vertical direction. In contrast, in the partial denture 1 according to 3 of Application Example 1, the axis of the hinge portion 40 is in the horizontal direction, and the pair of engaging members 20 and 30 are vertically moved. In the partial denture 1 according to 1 of the application example 1, the ends of the pair of distal arms 22 and 32 are hinge-coupled with respect to the hinge portion 40 and the hinge portion 40, whereas the application example In the partial denture 1 according to 1-3, the first divided body 12 and the second divided body 13 of the artificial tooth 10 are hinge-coupled (at a site inside the dentition).

  Moreover, in the partial denture 1 which concerns on 1 of the application example 1, if the occlusal part 13A of the 2nd division body 13 of the artificial tooth 10 is pushed to the outer side of a dentition, the lock structure 14 will remove | deviate and a pair of engaging member 20 , 30 can be opened, but in the partial denture 1 according to 3 of Application Example 1, a hook 35 is provided on the outer surface of the outer engagement member 30 in order to make it easier to remove the lock structure 14.

  The procedure for attaching the partial denture 1 according to 3 of Application Example 1 to the dentition is basically the same as the partial denture 1 according to 1 of Application Example 1. First, the pair of engaging members 20 and 30 are opened, and in this state, the pair of engaging members 20 and 30 are moved in and out of the dentition as shown in FIG. When the pair of engaging members 20 and 30 are moved to corresponding positions, the inner engaging member 20 is then moved to the dentition side and engaged with the dentition from the inside as shown in FIG.

  Next, as shown in FIG. 17, the outer engagement member 30 is moved to the dentition side to close the pair of engagement members 20 and 30, and as shown in FIG. Engage the dentition from the outside. At this time, the pair of engaging members 20 and 30 are fixed in the closed state by the lock structure 14, and the partial denture 1 is attached to the dentition.

  Here, in the partial denture 1 according to application example 3, when the outer engagement member 30 is moved to the dentition side, the outer engagement member 30 is applied according to 1 of application example 1 that moves in the lateral direction. Unlike the partial denture 1, it moves in an arc from the occlusal side to the root side around the axis of the hinge 40. However, by setting the position of the hinge portion 40, the outer engaging member 30 does not interfere with the outer surface of the tooth row having a drum shape, and reaches and engages the tooth neck portion. Therefore, even the partial open / closed partial denture 1 according to 3 of Application Example 1 can be easily attached to the dentition.

<Other aspects of application example 1>
In addition, the partial denture based on the application example 1 is not limited to 1 to 3 of the application example 1, and various modifications can be made without departing from the gist of the application example 1.

  For example, in 1 to 1 of Application Example 1 described above, the pair of engaging members 20 and 30 are opened and closed by a rotating structure by the hinge portion 40. However, for example, the pair of engaging members 20 and 30 may be opened and closed by being relatively displaced in parallel in the inner and outer directions of the dentition.

  Further, in 1 to 1 of Application Example 1 above, the combination of the first engaging portion 23 and the second engaging portion 24 is provided on the inner engaging member 20. However, the combination of the first engaging portion 23 and the second engaging portion 24 may be provided also on the outer engaging member 30, and not the inner engaging member 20 but the outer engaging member 20. It may be provided only on the engaging member 30.

  In addition, in 1 to 1 of Application Example 1 described above, the artificial tooth 10 is configured in a divided manner. However, the artificial tooth 10 may not be a split type but may be a single type provided on either the inner engagement member 20 or the outer engagement member 30. However, as described above, it is the outer engagement member 30 that has a relatively high possibility of refurbishment. Therefore, when taking a single unit, it is preferable to provide the artificial tooth 10 on the inner engagement member 20. .

  Further, in the first to third 3 of the application example 1, the inner engagement member 20 and the outer engagement member 30 are engaged with the same tooth. However, it is not limited to this. For example, the outer engaging member 30 may be engaged with a part of the teeth with which the inner engaging member 20 is engaged, or vice versa, or the teeth with which the inner engaging member 20 is engaged. The teeth engaged by the outer engagement member 30 may be different or may be shifted in the dentition direction.

  Further, in the first to first 3 of the application example 1, the first engaging portion 23 and the second engaging portion 24 are basically engaged with the same tooth. However, the tooth with which the first engaging portion 23 is engaged and the tooth with which the second engaging portion 24 is engaged may not be completely coincident. For example, you may make it the 2nd engaging part 24 engage with a part of tooth | gear with which the 1st engaging part 23 engages, and what is the tooth | gear with which the 1st engaging part 23 engages? The second engaging portion 24 may be engaged with different teeth.

  In addition, the number of teeth with which the first engagement portion 23 engages is preferably at least three teeth from the viewpoint of suitably dispersing the occlusal force applied to the artificial tooth 10. This also depends on the number of missing teeth, and the first engaging portion 23 is preferably engaged with a number of teeth that is twice or more the number of missing teeth.

  Further, in 1 to 1 of Application Example 1 described above, the first engagement portion 23 is provided at a portion not on the occlusal surface so as not to change the original engagement. However, conversely, for the purpose of correcting the meshing, the first engaging portion 23 may be provided at a site on the occlusal surface.

  Further, in the first to third of application example 1, the recess 25 is provided in a portion corresponding to each tooth of the engagement member 20, and the first engagement portion 23 is provided at the occlusal end of the recess 25. The second engagement portion 24 is provided at the end of the recess 25 on the tooth root side so that the engagement between the engagement member 20 and the tooth surface is strengthened. However, instead of the surface contact, the first engaging portion 23 and the second engaging portion 24 may be partially engaged.

  Moreover, in 1 thru | or 3 of the said application example 1, the 1st division body 12 and the inner side engagement member 20 of the artificial tooth 10, and the 2nd division body 13 and the outer side engagement member 30 are each, It is integrally molded by casting. However, the manufacturing method is not limited to casting, and may be cut out by cutting. Further, the artificial tooth 10 and the engaging members 20 and 30 may be integrated by combining separately created ones.

  Further, in 1 to 1 of Application Example 1 above, the occlusal side surface 12a of the first divided body 12 constituting the first divided surface 11a of the artificial tooth 10 and the root of the second divided body 13 are used. The side surface 13b on the side, the rising surface 12d of the first divided body 12 constituting the second divided surface 11b, and the rising surface 13d of the second divided body 13 are in surface contact with each other. However, it is not limited to this. The first divided surface 11a is preferably in surface contact in order to properly transmit the occlusal force, but the second divided surface 11b is not necessarily in surface contact and may have a slight gap.

  In 1 to 1 of Application Example 1, the second divided body 13 of the artificial tooth 10 has a laminated structure of a base portion 13C and a coating portion 13D. However, the present invention is not limited to this, and for example, a metal material constituting the base portion 13C may be integrally formed with a shape corresponding to the base portion 13C and the coating portion 13D. In short, if it is not aesthetically pleasing, the single base portion 13C may be provided with the cusp or occlusal surface of the artificial tooth 10 or the outer surface of the artificial tooth 10 without using the coating portion 13D. The same applies to the coating process on the outer surface of the outer engagement member 30. The coating process is not necessarily essential if it is not aesthetically pleasing.

  Further, in 1 to 1 of Application Example 1 described above, the lock structure 14 is a combination of the engagement recess and the engagement protrusion. However, the present invention is not limited to this, and any known or well-known lock structure that can be applied to an openable / closable partial denture can be used.

  Further, in 1 to 1 of Application Example 1 described above, the lock structure 14 is provided on the divided surface 11 of the artificial tooth 10. However, the present invention is not limited to this, and the lock structure 14 may be provided in another part.

<Application example 2>
The partial denture according to Application Example 2 is
An artificial tooth placed in the missing part of the dentition,
An inner engaging member that supports the artificial tooth and engages the inside of the dentition;
It is connected to the inner engagement member or artificial tooth, has elasticity, and elastically deforms in a direction away from the inner engagement member, thereby enabling insertion of a tooth row between the inner engagement member and the inner engagement member. And an outer engaging member that engages the outside of the dentition by elastically restoring,
The inner engagement member includes a first engagement portion that engages with an inclined portion that is inclined in a direction that widens toward the root of each of the plurality of teeth in the dentition,
The outer engaging member includes a second engaging portion that engages with an undercut portion that is inclined to the opposite side of the inclined portion of at least one tooth in the dentition.

  According to this configuration, when the partial denture is mounted on the dentition, first, the partial denture is adjusted to an appropriate position with respect to the dentition and then pushed into the root side. As a result, the outer engagement member elastically changes in a direction away from the inner engagement member as the second engagement portion comes into contact with the outer surface of the tooth and moves toward the maximum ridge of the outer surface. And if a 2nd engaging part exceeds the maximum bulge part of the outer surface of a tooth | gear, an outer engaging member will be elastically restored. As a result, the pair of engaging members engage with the inside and outside of the dentition, and the partial denture is mounted on the dentition.

  When the partial denture is mounted on the dentition, the first engagement portion engages with the inside of the dentition and the second engagement portion engages with the outside of the dentition. The engaging member engages so as to sandwich the tooth row from the inside and the outside. Therefore, the partial denture is firmly attached to the dentition without moving in any of the inner and outer directions (horizontal direction) of the dentition, the occlusal direction (vertical direction), and the rotation direction with respect to the dentition.

  In addition, while the partial denture is mounted, the first engaging portion is engaged with each of the plurality of teeth in the dentition that is inclined in a direction that widens toward the root. Therefore, the occlusal force applied to the artificial tooth does not substantially act on the alveolar ridge in the defect portion and is distributed to a plurality of teeth.

  Further, while the partial denture is mounted, the second engagement portion is engaged with an undercut portion that is an inclined portion inclined to the opposite side of the inclined portion of at least one tooth in the dentition. . Therefore, the partial denture does not come out of the dentition.

  On the other hand, when removing the partial denture from the dentition, the partial denture is pulled to the occlusal side. Thus, as the second engaging portion moves toward the largest bump on the outer surface of the tooth, the outer engaging member elastically changes in a direction away from the inner engaging member, and the pair of engaging members Since the interval increases, the partial denture can be removed.

  Here, as one aspect of the partial denture according to the application example 2, a partial denture for the free ends on both sides of the dentition on both sides of the dentition where there is no tooth in the distal direction than the defect portion, Artificial teeth are connected to each other to form an arch shape that engages the inside of the dentition, and the outer engagement member includes a pair of left and right arm portions extending from the distal side along the dentition to the mesial position. The engagement portion can be configured to be provided in each of the pair of arm portions corresponding to each of the plurality of teeth including the front teeth and molar teeth in the dentition.

  Further, as another aspect of the partial denture according to Application Example 2, a partial denture for a one-side free end that has no teeth at a distal side than a missing portion on the right side or the left side of a dentition, the inner engagement member is a right side Alternatively, an artificial tooth is connected to one end of the left side and formed into an arch shape that engages the inside of the dentition, and the outer engagement member is a pair of left and right arms extending from the distal side along the dentition to the mesial position. The second engaging portion can adopt a configuration in which a plurality of second engaging portions are provided on each of the pair of arm portions corresponding to each of the plurality of teeth including the front teeth and the molars in the dentition.

  According to these configurations, since the plurality of second engaging portions are engaged with each other on the outside of the dentition from different directions, the force of the anterior tooth side to rise to the partial denture depending on the direction of the occlusal force applied to the artificial tooth. Even if a force acts to lift either the right side or the left side, the second engaging portion in that direction mainly resists, and the partial denture can be prevented from rising.

  Further, as another aspect of the partial denture according to Application Example 2, a configuration in which the inner engagement member includes a crown portion that covers each of one or more teeth adjacent to the missing portion can be employed.

  According to such a configuration, in combination with the pair of engaging members engaging so as to sandwich the dentition from the inside and the outside, the partial denture is in the inner and outer direction (horizontal direction) of the dentition, the occlusal direction (up and down) (Direction) and the rotation direction with respect to the dentition are firmly attached to the dentition without moving.

  As still another aspect of the partial denture according to Application Example 2, the arm portion is disposed on the outer surface of the gingiva, and the outer engagement member is connected to each tooth from a portion corresponding to each of the plurality of teeth in the arm portion. It is possible to employ a configuration in which a plurality of roach portions extending toward the outer surface of the plurality of roach portions are provided, and the second engaging portion is formed at the tip of each of the plurality of roach portions.

  Further, in this case, the roach portion may employ a configuration formed in a T shape having a lateral bar portion that is curved along the outer side surface of the tooth as a second engaging portion at the distal end portion.

  As described above, according to the partial denture according to Application Example 2, by using the remaining tooth as it is, it is not necessary to cut the remaining tooth or the alveolar bone like a crown bridge or an implant, and the partial denture can be removed. Can be installed. Further, according to the partial denture according to the application example 2, the occlusal force applied to the artificial tooth is not burdened to the alveolar ridge via the denture base, but is distributed to a plurality of remaining teeth and is thus burdened. Can solve various problems.

<1 of Application Example 2>
Hereinafter, a first specific example (part 1 of application example 2) of the partial denture according to application example 2 will be described with reference to FIGS. 19 to 23. The partial denture according to 1 of the application example 2 is attached to the upper dentition. Here, for convenience, an upper jaw model imitating the upper jaw is used and this is considered as an actual upper jaw. .

  As shown in FIGS. 19 to 22, the partial denture 1 according to Application Example 1 1 is for prosthetic restoration of the missing portions 51 and 51 of the left and right 6th and 7th molars. The teeth 52, 52, the second incisor 53, 53, the third canine 54, 54, the fourth molar 55, 55, and the fifth molar 56, 56 are mounted on the dentition. In other words, the partial denture 1 is for the so-called free ends on both sides where there are no teeth in the centrifuge than the left and right missing parts 51, 51.

  The partial denture 1 is connected to the artificial tooth 10 disposed in the defect portion 51, the inner engagement member 20 that supports the artificial tooth 10 and engages the dentition from the inside, and the artificial tooth 10, and has elasticity. Then, by elastically deforming in a direction away from the inner engagement member 20, the tooth row can be inserted between the inner engagement member 20 and elastically restored to engage the tooth row from the outside. And an engaging member 30 on the outside.

  The artificial tooth 10 is a single body imitating the shape of a tooth or a laminated body having a base coated with a well-known coating having a white color of the same color as the tooth to make it appear externally. In Application Example 2, the two adjacent molars of No. 6 and No. 7 on the left and right are missing, and the artificial tooth 10 is provided with these two teeth integrally.

  The inner engagement member 20 has an arch shape that engages the entire dentition from the inside. In Application Example 2, the inner engagement member 20 includes left and right first incisors 52 and 52, second incisors 53 and 53, third canine teeth 54 and 54, fourth molar 55, It has an arch shape that engages with the inside of the remaining dentition of No. 55 and No. 5 molars 56 and 56.

  As shown in detail in FIG. 23, the inner engagement member 20 has a gap between the end edge on the root side and the edge of the inner gum 59 in order to prevent plaque from adhering to the tooth neck. Engage inside the dentition so that it is not possible.

  Moreover, the inner engaging member 20 includes first engaging portions 23,... That engage with the inclined portions of the corresponding teeth that are inclined so as to expand toward the tooth root. In Application Example 2, the inner engagement member 20 includes left and right first incisors 52 and 52, second incisors 53 and 53, third canine teeth 54 and 54, fourth molar 55, A first engagement portion 23 is provided for each of the 55 and fifth molars 56 and 56.

  Further, the inner engagement member 20 is a portion (one occlusion of a crown) of one or a plurality of molars close to the defect portion 51 from the occlusal surface to the inner and outer inclined portions that incline in a direction extending toward the root. A crown portion 26 is provided on the side portion. In Application Example 2, the inner engagement member 20 includes a crown portion 26 for each of the left and right fourth molars 55 and 55 and the fifth molars 56 and 56.

  Further, the inner engaging member 20 includes a spacer portion 27 having a predetermined thickness and covering the cut end portion of each mesial tooth. The spacer portion 27 extends from the end edge portion on the occlusion side of the first engaging portion 23 in each corresponding tooth, bends outward from the inside through the cutting edge, and is placed on the cutting edge portion of each tooth. The spacer portion 27 is formed of a transparent resin or the like so as to be inconspicuous in appearance. In Application Example 2, the inner engagement member 20 is provided for the front teeth of the first and second incisors 52 and 52, the second incisors 53 and 53, and the third canines 54 and 54, respectively. A spacer portion 27 is provided.

  The spacer portion 27 is integrally formed along the front tooth row. In the front tooth row, the first engaging portion 23 is continuous along the front tooth row with an intermediate portion in the occlusal direction (vertical direction) of the crown of each tooth as an end edge portion on the occlusion side. Therefore, the spacer part 27 is arrange | positioned rather than the intermediate part in the occlusion direction of the crown of each tooth in the front tooth row | line | column.

  The outer engagement member 30 is located in a mesial manner along a dentition from a predetermined portion of the artificial tooth 10, more specifically, from a portion corresponding to the outer tooth neck of the artificial tooth 10 corresponding to the sixth molar. The arm part 31 extended, and the T-shaped roach part 33 extended from the site | part corresponding to each tooth | gear in the arm part 31 toward the outer surface of each tooth | gear.

  Since the arm part 31 is long, it has flexibility resulting from elasticity. The arm portions 31 are elastically deformed in a direction (outside) in which each of the roach portions 33 is separated from the inner engagement member 20, so that the interval between the roach portion 33 and the inner engagement member 20 is increased. Yes.

  The horizontal bar portion 33a of the roach portion 33 is curved so as to be fitted to the outer surface of the tooth that is curved from the mesial to the centrifugal, and becomes the second engaging portion 34 that engages with the undercut portion outside the tooth. . In Application Example 2, the outer engagement member 30 includes left and right second incisors 53, 53, third canines 54, 54, fourth molars 55, 55, and 5 having undercut portions. A second engaging portion 34 is provided for each of the molars 56, 56.

  The arm portion 31 is disposed on the outer surface of the gum 59. From there, the roach 33 extends to the occlusal side and reaches the outer surface of the tooth. The second engaging portion 34 (the horizontal bar portion 33a of the roach portion 33) is adapted to engage closer to the maximum bulge portion in the undercut portion. In addition, since the undercut part does not necessarily exist in all the teeth (especially the front tooth), in that case, the second engaging part 34 is simply engaged with the outer surface of the tooth.

  Although not shown in the drawings, as an aesthetic treatment, a portion of the outer surface of the outer engagement member 30 that is applied to the gingiva 59 has a skin color that is the same color as that of the gingiva, and is a known coating that looks like gingiva in appearance. In addition, a portion of the outer surface of the outer engagement member 30 that is applied to the teeth may be provided with a known coating having a white color that is the same color as the teeth and appearing on the appearance. is there.

  The material of the partial denture 1 may be any material as long as it has rigidity as a partial denture and can give elasticity to the arm portion 31 of the outer engagement member 30, such as a cobalt-chromium-molybdenum alloy or the like. In addition to metals such as gold alloys, synthetic resins such as polyetheretherketone (PEEK) resin and ceramics such as zirconia can be used. In Application Example 2, the artificial tooth 10, the inner engagement member 20 (excluding the spacer portion 27), and the outer engagement member 30 are made of metal integrally formed by casting using a metal material.

  The partial denture 1 according to 1 of the application example 2 has the above-described configuration. Next, a procedure for mounting the partial denture 1 on the dentition will be described.

  First, after the partial denture 1 is adjusted to an appropriate position with respect to the dentition, it is pushed into the root side. As a result, as the lateral bar portion 33a (second engagement portion 34) of each of the roach portions 33 of the outer engagement member 30 contacts the outer surface of the tooth and moves toward the maximum bulge portion of the outer surface, the outer side The engagement member 30 is elastically changed in a direction away from the inner engagement member 20. And if the horizontal bar part 33a exceeds the largest bulge part of the outer surface of a tooth | gear, the outer engaging member 30 will be elastically restored. Thereby, as shown in FIG. 23, a pair of engaging members 20 and 30 engage with the inner side and the outer side of the dentition, and the partial denture 1 is attached to the dentition.

  Here, in the partial denture 1 according to Application Example 2, a second engagement portion 34 that engages with an undercut portion of each tooth is formed on the outer engagement member 30. Therefore, if the partial denture 1 is left as it is, the second engaging portion 34 cannot interfere with the dentition (the ridge on the outer side surface thereof) and attach the partial denture 1 to the dentition. However, the partial denture 1 according to 1 of the application example 2 can be elastically changed so that the outer engagement member 30 is widened with the inner engagement member 20. Thereby, the 2nd engaging part 34 can be engaged with the undercut part which exists in the tooth root side rather than the largest bulge part beyond the largest bulge part of the outer surface of each tooth, and the partial denture 1 is dentition Can be easily installed.

  When the partial denture 1 is mounted on the dentition, the plurality of first engagement portions 23,... Of the inner engagement member 20 are engaged with the inner side of the dentition. In addition, the plurality of second engaging portions 34 of the outer engaging member 30 engage with the outside of the tooth row. Thereby, a pair of engaging members 20 and 30 are engaged so that a tooth row may be pinched | interposed from the inner side and the outer side. In addition, the molar portion in the dentition is covered with a crown portion 26 so as to cover a portion on the occlusal side of the crown. Therefore, the partial denture 1 according to Application Example 2 1 can move to the dentition without moving in any of the internal and external directions (horizontal direction), the occlusal direction (vertical direction), and the rotation direction with respect to the dentition. Can be attached firmly.

  And the partial denture 1 which concerns on 1 of the application example 2 is a metal rigid body, and is hard to produce bending and a deformation | transformation. Therefore, even if it is used for a long time, the engaged state does not weaken or become uneven. Thereby, the user can use a partial denture with a comfortable wearing feeling.

  Moreover, according to the partial denture 1 which concerns on 1 of the application example 2, while mounting | wearing with a dentition, several 1st engaging parts 23 and ... are several teeth (1 of the application example 2) in a dentition. The left and right first incisors 52, 52, the second incisors 53, 53, the third canine teeth 54, 54, the fourth molars 55, 55 and the tenth molars 56, 56 Each of the teeth) is engaged with an inclined portion that inclines in a direction that expands toward the tooth root. Therefore, the occlusal force applied to the artificial tooth 10 does not substantially act on the alveolar ridge in the defect portion 51 and can be distributed to a plurality of teeth. As a result, hard foods that require a strong occlusal force held by partial dentures cannot be eaten, and the load is unbalanced, so the burden on the remaining teeth is large and the life of the remaining teeth is shortened. Can be solved.

  In addition, when the occlusal force is applied to the left and right artificial teeth 10, 10, even if a force is exerted on the partial denture 1 to lift the front teeth, the second incisors 53 engage with the second incisors 53, 53. The engaging portion 34 mainly resists to prevent the floating. Even if the right or left artificial tooth 10 is subjected to an occlusal force, even if the right or left side of the partial denture 1 is subjected to a force to lift the other side, either the right side or the left side The second engaging portion 34 that engages with the other third to fifth teeth mainly resists and can also be prevented from rising. Such a lifting prevention mechanism is also generated by the end portion of the second engagement portion 34 because each second engagement portion 34 has a curved shape along the outer surface of the tooth. Is. Therefore, the partial denture 1 according to application example 1 has any direction of the inner and outer directions (horizontal direction) of the dentition, the occlusal direction (vertical direction), and the rotation direction with respect to the dentition, no matter how the occlusal force is applied. In this case, it can be firmly attached to the dentition without moving.

  And the partial denture 1 which concerns on 1 of the application example 2 is a metal rigid body, and is hard to produce bending and a deformation | transformation. Therefore, even if it is used for a long time, the engaged state does not weaken or become uneven. As a result, there is no problem in that the effect of dispersion of the occlusal force is biased, and the occlusal force acts excessively on a specific tooth to shorten the life of the tooth.

  Moreover, the partial denture 1 which concerns on 1 of the application example 2 is mounted | worn using a residual tooth as it is. This eliminates the need to cut the remaining teeth in order to align the partial dentures like a crown bridge. Therefore, it has a very large effect for the user that the loss of the healthy tooth can be prevented.

  Further, in the partial denture 1 according to Application Example 2, the height of the tooth covered with the crown portion 26 is increased by the thickness of the crown portion 26, and thus the artificial tooth 10 is also higher than the original missing tooth. The front teeth are covered with a spacer portion 27 having a predetermined thickness. Thereby, when the remaining dentition is not properly meshed, the meshing can be corrected (reconstructed).

<Application example 2-2>
Next, a second specific example of the partial denture according to Application Example 2 (Application Example 2-2) will be described with reference to FIGS. 24 and 25.

  The partial denture 1 according to 2 of application example 2 is not a free end on both sides as in 1 of application example 2, but a free end on one side (in 2 of application example 2 the left 6th molar and left 7th molar). Deficiency). Therefore, the configuration is basically the same as that of the partial denture 1 according to Application Example 2 1, except that the right artificial tooth 10 is not necessary in Application Example 2-2, and the right outer side. The engaging member 30 is connected to the right end portion of the inner engaging member 20 through the connecting portion 31a. Specifically, in Application Example 2-2, the inner engagement member 20 has a length in the row direction that can be engaged up to the right fifth molar 56, and the right end of the right end of the right fifth portion. The connecting portion 31a extending from the outside to the inside through the interproximal portion of the right molar and the right sixth molar is connected. In Application Example 2-2, the right outer engagement member 30 is integrally formed with the inner engagement member 20 and connected to the inner engagement member 20.

  Another difference is that in application example 2-2, the meshing is not corrected. Therefore, in application example 2-2, the crown part 26 and the spacer part 27 of the partial denture 1 according to application example 2 1 are not provided. Therefore, as shown in FIG. 25 (b), the inner engagement member 20 has a height dimension covering almost the entire inner surface of the teeth with respect to the left and right molars 55, 56, and the first engagement. The portion 23 is formed at an end edge portion on the occlusion side of the inner engagement member 20. However, when the first engaging portion 23 advances to the occlusal surface of the molars 55 and 56, the lower jaw teeth and the first engaging portion 23 come into contact with each other, and the meshing of the teeth changes. For this reason, the first engaging portion 23 is engaged with a portion of the molars 55, 56 that is inclined in a direction that expands toward the root, not on the occlusal surface, for example, a portion slightly on the root side of the occlusal surface. It comes to match. The same applies to the connecting portion 31a of the engagement member 30 on the right outer side.

  The partial denture 1 according to 2 of the application example 2 also has the same effect as the partial denture 1 according to the application example 2 of 1.

<Other aspects of application example 2>
The partial denture according to Application Example 2 is not limited to 1 to 2 of Application Example 2, and various modifications can be made without departing from the gist of Application Example 2.

  For example, in application example 2 1 above, the meshing correction is performed, and in application example 2 2 above, the meshing correction is not performed. However, in the application example 2, the crown part 26 and the spacer part 27 may not be provided (the meshing correction is not performed). In the application example 2, the crown part 26 and the spacer part 27 are not provided. It may be provided (correction of meshing).

  Further, in the first application example 2, the first engaging portion 23 is engaged with all the teeth of the remaining dentition, and in the first to second examples 2 to 2, the first left and right incisors. Except for 52 and 52, the second engaging portion 34 is engaged with all the teeth of the remaining dentition. However, the number of the first engaging portions 23 and the second engaging portions 34 may be reduced as long as the effect of the application example 2 is not impaired.

  Further, in 1 to 2 of Application Example 2, the outer engagement member 30 includes an arm portion 31 and a roach portion extending from a portion corresponding to each tooth in the arm portion 31 toward the outer surface of each tooth. 33 and the second engaging portion 34 is formed at the tip end portion (lateral bar portion 33a) of the roach portion 33. However, the formation of the second engaging portion 34 is not limited to this form. For example, the roach portion 33 is not provided, and the second engagement portion 34 is formed at the occlusal end edge portion of the inner engagement member 20 (arm portion 31), and is mainly engaged with the tooth neck portion. Also good.

  Further, in 1 to 2 of Application Example 2 described above, the roach portion 33 has a T-shape having a lateral bar portion 33a that is curved along the outer surface of the tooth as a second engaging portion 34 at the distal end portion. It is formed. However, the roach portion 33 may have other shapes such as an I shape, an L shape, and a U shape.

  Moreover, the partial denture 1 which concerns on 1-2 of 1-2 of the said application example 2 is a partial denture with respect to the free end of both sides or one side. However, it may be a partial denture for an intermediate defect in which natural teeth remain in the centrifuge rather than the defect part 51. In this case, for the No. 7 molar (or No. 8 molar if present), the configuration of the partial denture 1 according to No. 1 in Application Example 2 with respect to the No. 4 or No. 5 tooth (with the crown portion 26). And a configuration for the fourth and fifth teeth of the partial denture 1 according to 2 of Application Example 2 (the crown portion 26 is not provided, and the first engagement portion 23 is engaged around the occlusal surface). To be adopted).

  Moreover, the partial denture 1 which concerns on 1 of the said application example 2 is a partial denture with respect to a both-side free end, and the partial denture 1 which concerns on 2 of the said application example 2 is a partial denture with respect to a one-side free end. However, in the partial denture 1 according to 1 of the above application example 2, the partial denture in a form in which the opposite side of the left side or the left side of the first or third anterior teeth 52 to 54 is eliminated from the left side. Can be employed as a partial denture for a free end on one side.

  In addition, the number of teeth with which the first engagement portion 23 engages is preferably at least three teeth from the viewpoint of suitably dispersing the occlusal force applied to the artificial tooth 10. This also depends on the number of missing teeth, and the first engaging portion 23 is preferably engaged with a number of teeth that is twice or more the number of missing teeth.

<Application example 3>
The partial denture according to Application Example 3 is
An artificial tooth placed in the missing part of the dentition,
An engaging member that supports the artificial tooth and is deformable into a first state that engages inside the dentition in an arch shape and a second state that bends so that the width is narrowed;
A lock structure for releasably fixing the first state,
The engaging member includes a first engaging portion that engages an inclined portion that inclines in a direction that expands toward the root of each of the plurality of teeth in the dentition, and each of the plurality of teeth in the dentition. A second engaging portion that engages with an undercut portion that is inclined to the opposite side of the inclined portion is provided.

  According to such a configuration, when the partial denture is mounted on the dentition, first, the engaging member is set to the second state. As a result, the engaging member can be inserted inside the tooth row, and in this state, the engaging member is moved inside the tooth row. Then, the engaging member is set to the first state. As a result, the engaging member engages with the inside of the dentition, and the lock structure works, so that the partial denture is mounted on the dentition.

  And if a partial denture is mounted | worn with a dentition, a 1st engaging part and a 2nd engaging part will engage with the inner side of a dentition. In addition, the engaging member has an arch shape with the center protruding from both ends, and the first engaging portion and the second engaging portion are provided at a plurality of locations on the arch. Therefore, the partial denture is firmly attached to the dentition without moving in any of the inner and outer directions (horizontal direction) of the dentition, the occlusal direction (vertical direction), and the rotation direction with respect to the dentition.

  In addition, while the partial denture is mounted, the first engaging portion is engaged with each of the plurality of teeth in the dentition that is inclined in a direction that widens toward the root. Therefore, the occlusal force applied to the artificial tooth does not substantially act on the alveolar ridge in the defect portion and is distributed to a plurality of teeth.

  Furthermore, while mounting the partial denture, the second engaging portion engages with an undercut portion that is an inclined portion inclined to the opposite side of the inclined portion of each of the plurality of teeth in the dentition. Yes. Therefore, the partial denture does not come out of the dentition.

  On the other hand, when removing the partial denture from the dentition, the lock structure is released and the engaging member is brought into the second state. Thereby, the width | variety of an engaging member becomes narrow, an engaging member spaces apart from a tooth row, and it can remove a partial denture.

  Here, as one aspect of the partial denture according to Application Example 3, the engagement member includes a recess having a shape along the surface of each of the plurality of teeth, and the first engagement portion is formed at the end portion on the occlusion side of the recess. In addition, it is possible to employ a configuration in which the second engaging portion is formed at the tooth root side end of the recess.

  According to such a configuration, the concave portion comes into surface contact with the surface of the tooth so as to wrap the surface of the tooth (No. 4 to No. 7 molar) that has a drum shape by having the maximum bulge portion in the middle in the vertical direction of the crown. The partial denture is more firmly attached to the dentition.

  Further, as another aspect of the partial denture according to Application Example 3, the engagement member includes a first engagement member extending mesially along the tooth row from the distal end, and a mesial end of the first engagement member. And a second engaging member extending further along the dentition, wherein the first engaging member and the second engaging member are the first engaging member and the second engaging member. The structure provided in each of the engaging members can be employed.

  According to this configuration, when the partial denture is mounted on the dentition, first, the second engagement member is rotated to the first engagement member side to bring the engagement member into the second state. As a result, the engaging member can be inserted inside the tooth row, and in this state, the engaging member is moved inside the tooth row. And a 2nd engagement member is rotated to the opposite side to a 1st engagement member, and an engagement member is made into a 1st state. As a result, the engaging member engages with the inside of the dentition, and the lock structure works, so that the partial denture is mounted on the dentition.

  On the other hand, when removing the partial denture from the dentition, the lock structure is released and the second engagement member is rotated to the first engagement member side to bring the engagement member into the second state. Thereby, the width | variety of an engaging member becomes narrow, an engaging member spaces apart from a tooth row, and it can remove a partial denture.

  In this case, the engagement member includes a superposed portion in which a mesial end portion of the first engagement member and a connection-side end portion of the second engagement member overlap in the inner and outer directions of the dentition, and has a lock structure. Can adopt a configuration provided on the overlapping surface of the first engaging member and the second engaging member in the overlapping portion.

  According to such a configuration, when the engagement member is changed from the second state to the first state and the engagement member engages with the inside of the tooth row, the engagement member is fixed to the first state by the lock structure. The partial denture is attached to the dentition. On the other hand, when removing the partial denture from the dentition, the lock structure is released to bring the engagement member into the second state, the engagement member is separated from the dentition, and the partial denture is removed.

  As described above, according to the partial denture according to Application Example 3, by using the remaining tooth as it is, it is not necessary to cut the remaining tooth or the alveolar bone like a crown bridge or an implant, and the partial denture can be removed. Can be installed. In addition, according to the partial denture according to Application Example 3, the occlusal force applied to the artificial tooth is not burdened to the alveolar ridge via the denture base, but is distributed and burdened on a plurality of remaining teeth. Can solve various problems.

<1 of Application Example 3>
Hereinafter, a specific example (part 1 of application example 3) of the partial denture according to application example 3 will be described with reference to FIGS. 26 to 32. The partial denture according to 1 of Application Example 3 is attached to the upper dentition, but here, for convenience, an upper jaw model simulating the upper jaw is used, and this is considered as an actual upper jaw. .

  As shown in FIGS. 26 to 30, the partial denture 1 according to Application Example 1 1 is for prosthesis of the left and right first and second anterior missing portions 51, and the left and right third canine teeth 54, 54, 4th molar 55,55, 5th molar 56,56, 6th molar 57,57 and 7th molar 58,58.

  The partial denture 1 is bent so that the width is narrowed, and the artificial tooth 10 disposed in the defect portion 51, the first state that supports the artificial tooth 10 and engages the inside of the dentition with an arch shape. Engaging members 20A and 20B that are deformable to the second state are provided.

  The artificial tooth 10 is a laminated body in which a known coating (coating portion 16) is applied to the base portion 15 so that the base portion 15 has the same white color as the tooth and looks like a tooth on the appearance. In Application Example 3, the left and right first and second adjacent four front teeth are missing, and the artificial tooth 10 is provided with these four teeth integrally.

  The engaging members 20A and 20B are rotatably connected to a first engaging member 20A extending from the distal end along the dentition and mesial to the mesial end of the first engaging member 20A. And a second engagement member 20B extending along the tooth row. In Application Example 3, the first engagement member 20 </ b> A extends from the left seventh molar 58 to the left third canine 54 and further extends to fill the defect 51. On the other hand, the second engagement member 20B starts from the missing portion 51 and extends from the right third tooth to the right seventh tooth 58.

  The mesial end of the first engagement member 20A, that is, the site in the defect 51 of the first engagement member 20A, and the mesial end of the second engagement member 20B, that is, the second The portions of the engagement member 20 </ b> B in the defect portion 51 overlap with each other such that the former is on the outside and the latter is on the inside, thereby forming the overlapping portion 28. In addition, the site | part in the defect | deletion part 51 of 20 A of 1st engagements serves as the base part 15 of the artificial tooth 10. FIG.

  The mesial end portion of the second engagement member 20B is rotatably connected to the mesial end portion of the first engagement member 20A at the overlapping portion 28. In 1 of the application example 3, between the mesial tip of the second engagement member 20B and the mesial end of the first engagement member 20A, between the left and first front teeth. Corresponding parts are rotatably connected by a hinge part 40 using a pin shaft 41.

  Then, on the overlapping surfaces 28a and 28b of the first engaging member 20A and the second engaging member 20B in the overlapping portion 28, the mesial end of the first engaging member 20A and the second engagement A lock structure 29 is provided for releasably fixing the overlapped state (matched state) of the mesial end (the end on the connection side) of the member 20B.

  The lock structure 29 includes an engagement recess formed in one of the rising surfaces 28a of the first engagement member 20A or the overlapping surface 28b of the second engagement member 20B, and the other rising surface. And an engaging protrusion formed on the surface. As the second engagement member 20B rotates in a direction to engage the inside of the dentition, the mesial end of the first engagement member 20A and the connection side of the second engagement member 20B When the end portion overlaps (matches), the engaging protrusion is elastically deformed into the engaging recess and is locked. Further, as the second engagement member 20B rotates in the direction away from the inside of the dentition, the mesial end of the first engagement member 20A and the connection side of the second engagement member 20B When the end portion is separated, the engagement protrusion is disengaged from the engagement recess, and the lock is released.

  Each of the first engagement member 20A and the second engagement member 20B includes first engagement portions 23,... That engage with inclined portions of the corresponding teeth that are inclined in a direction that expands toward the tooth root. And a second engaging portion 24,... That engages with the undercut portion of the tooth having an undercut portion inclined to the opposite side of the inclined portion. In Application Example 3, the first engagement member 20A includes the left third canine 54, the left fourth molar 55, the left fifth molar 56, the left sixth molar 57, and the left seventh molar. For each of the 58 teeth, the left third canine tooth 54, the left fourth molar 55, the left fifth molar 56, and the left sixth molar 57 having the first engaging portion 23 and having an undercut portion. The second engaging portion 24 is provided for each of the left and right No. 7 molars 58. The second engagement member 20B is provided for each tooth of the right third canine 54, right fourth molar 55, right fifth molar 56, right sixth molar 57 and right seventh molar 58. A first right-side third canine tooth 54, a right-side fourth molar 55, a right-side fifth molar 56, a right-side sixth molar 57, and a right-side seventh molar 58 having a first engagement portion 23 and having an undercut portion. A second engaging portion 24 is provided for each tooth.

  The first engaging portion 23 is also provided at the mesial tip of the first engaging member 20A (see FIG. 29). In 1 of the application example 3, the first engagement member 20 </ b> A includes a first engagement portion 23 with respect to the right third toothed dog 54.

  As shown in FIG. 31, each of the first engaging member 20A and the second engaging member 20B includes a concave portion 25 having a shape along the inner surface of each tooth. The first engagement portion 23 is formed on the occlusal side (lower side in the drawing) of the recess 25. The second engagement portion 24 is formed on the tooth root side (the upper side in the drawing) of the recess 25.

  More specifically, each of the first engaging member 20A and the second engaging member 20B has a gingival 59 having an inner edge at the root side in order to prevent plaque from adhering to the tooth neck. Engage with the inside of the dentition so that there is no gap in contact with the edges. Therefore, the second engaging portion 24 is formed at the root edge end portion (the root portion end portion of the recess 25) of each of the first engaging member 20A and the second engaging member 20B. Engage with the tooth neck.

  Further, with respect to the molars 55 to 58, each of the first engaging member 20A and the second engaging member 20B has a height dimension that covers almost the entire inner surface of the tooth. Therefore, the first engagement portion 23 is formed at the end portions on the occlusion side of the first engagement member 20A and the second engagement member 20B (the end portion on the occlusion side of the recess 25). However, when the first engagement portion 23 advances to the occlusal surface of the molars 55 to 58, the lower jaw teeth and the first engagement portion 23 come into contact with each other, and the meshing of the teeth changes. Therefore, the first engaging portion 23 is engaged with a portion of the molars 55 to 58 that does not cover the occlusal surface, for example, a portion slightly on the root side of the occlusal surface, of the inclined portion that inclines in a direction that extends toward the root. Match.

  As the material of the partial denture 1, in addition to metals such as cobalt, chromium, molybdenum alloy and gold alloy, synthetic resins such as polyetheretherketone (PEEK) resin and ceramics such as zirconia can be used. In Application Example 3, each of the first engagement member 20A and the second engagement member 20B is made of metal integrally formed by casting using a metal material.

  The partial denture 1 according to 1 of the application example 3 has the above-described configuration. Next, a procedure for mounting the partial denture 1 on the dentition will be described.

  First, the engaging members 20A and 20B are bent so that the width is reduced to be in the second state. Accordingly, the engaging members 20A and 20B can be inserted inside the tooth row, and in this state, the engaging members 20A and 20B are moved inside the tooth row.

  When the engaging members 20A and 20B are moved to the corresponding positions, as shown in FIG. 32A, the first engaging member 20A is moved to the dentition side to engage the dentition from the inside. . Moreover, the artificial tooth 10 is arrange | positioned by this operation in the normal position on the alveolar ridge in the defect | deletion part 51 of a dentition.

  Next, as shown in FIG. 32 (b), the second engagement member 20B is moved to the dentition side so that the engagement members 20A and 20B are in an arched first state, and the second engagement is performed. The member 20B is engaged with the dentition from the inside. At this time, the engaging members 20A and 20B are fixed in the first state by the lock structure 29, and the partial denture 1 is mounted on the dentition.

  Here, the partial denture 1 according to 1 of the application example 3 includes the first engaging portion 23 and the first engaging member 23 that are opposite to each other in the first engaging member 20A and the second engaging member 20B. Both of the second engaging portions 24 are formed. Therefore, if the partial denture 1 is in the first state, that is, in the mounting form, the second engaging portion 24 interferes with the dentition (the ridges on the inner surface thereof) and attaches the partial denture 1 to the dentition. I can't. However, the partial denture 1 according to Application Example 3 has the width of the engagement members 20A and 20B (the distal end of the first engagement member 20A and the distal end of the second engagement member 20B). The bend type is adopted so that it can be inserted inside the dentition. Thereby, the 1st engaging part 23 and the 2nd engaging part 24 can be engaged with a dentition from a horizontal direction, and the partial denture 1 can be easily mounted | worn on a dentition.

  When the partial denture 1 is mounted on the dentition, the plurality of recesses 25 of the first engagement member 20A and the second engagement member 20B are surface-engaged with the inner surface of the dentition, and the first The plurality of first engaging portions 23,... And the plurality of second engaging portions 24,... Of each of the one engaging member 20A and the second engaging member 20B engage with the inside of the tooth row. Thereby, engagement member 20A, 20B is engaged so that it may stretch inside a tooth row. Therefore, the partial denture 1 according to 1 of Application Example 3 does not move in the dentition without moving in any of the inner and outer directions (horizontal direction) of the dentition, the occlusal direction (vertical direction), and the rotation direction with respect to the dentition. Can be attached firmly.

  And the partial denture 1 which concerns on 1 of the application example 3 is a metal rigid body, and is hard to produce bending and a deformation | transformation. Therefore, even if it is used for a long time, the engaged state does not weaken or become uneven. Thereby, the user can use a partial denture with a comfortable wearing feeling.

  Moreover, according to the partial denture 1 which concerns on 1 of the application example 3, while mounting | wearing with a dentition, several 1st engaging parts 23 and ... are several teeth (1 of the application example 3) in a dentition. The left and right third canines 54 and 54, the fourth molar 55 and 55, the fifth molar 56 and 56, the sixth molar 57 and 57, and the ten molars 58 and 58) It is engaged with the inclined part which inclines in the direction which spreads toward each tooth root. Therefore, the occlusal force applied to the artificial tooth 10 does not substantially act on the alveolar ridge in the defect portion 51 and can be distributed to a plurality of teeth. As a result, hard foods that require a strong occlusal force held by partial dentures cannot be eaten, and the load is unbalanced, so the burden on the remaining teeth is large and the life of the remaining teeth is shortened. Can be solved.

  And the partial denture 1 which concerns on 1 of the application example 3 is a metal rigid body, and is hard to produce bending and a deformation | transformation. Therefore, even if it is used for a long time, the engaged state does not weaken or become uneven. As a result, there is no problem in that the effect of dispersion of the occlusal force is biased, and the occlusal force acts excessively on a specific tooth to shorten the life of the tooth.

  Moreover, the partial denture 1 which concerns on 1 of the application example 3 is mounted | worn using a residual tooth as it is. This eliminates the need to cut the remaining teeth in order to align the partial dentures like a crown bridge. Therefore, it has a very large effect for the user that the loss of the healthy tooth can be prevented.

  Moreover, in the partial denture 1 which concerns on 1 of the application example 3, the lock structure 29 is provided in the superimposition part 28 of 1st and 2nd engagement member 20A, 20B. Therefore, the degree of freedom in design is high. Moreover, since the lock structure 29 is hidden by the overlapping surfaces 28a and 28b of the first and second engaging members 20A and 20B, it is very hygienic.

<Other aspects of application example 3>
In addition, the partial denture based on this invention is not limited to 1 of the said application example 3, A various change is possible in the range which does not deviate from the summary of the application example 3.

  For example, in the first application example 3, the engaging members 20A and 20B are bent by a rotating structure formed by the hinge portion 40. However, for example, the second engagement member 20B (the end thereof) may be bent by sliding on the first engagement member 20A.

  Moreover, in 1 of the said application example 3, the engagement member is comprised by 20 A of 1st engagement members, and the 2nd engagement member 20B. However, you may make it comprise an engagement member with one member. For example, the engagement member which consists of one member which has the deformation | transformation part which can be elastically deformed in an intermediate part may be sufficient.

  Moreover, in 1 of the said application example 3, the artificial tooth 10 is provided in the 1st engaging member 20A. However, the artificial tooth 10 may be provided on the second engagement member 20B. Alternatively, the artificial tooth 10 is divided, the first divided body of the artificial tooth 10 is provided in the first engaging member 20A, and the second divided body of the artificial tooth 10 is provided in the second engaging member 20B. May be used.

  In the first application example 3, the first engagement member 20A and the second engagement member 20B are engaged with teeth having the same tooth number. However, it is not limited to this. For example, the first engaging member 20A and the first engaging member 20A and the first engaging member 20A are arranged such that the number of teeth engaged with the first engaging member 20A is larger or smaller than the number of teeth engaged with the second engaging member 20B. The lengths in the dentition direction of the two engaging members 20B may be different. Therefore, it is not essential that each of the first engaging member 20A and the second engaging member 20B extends to the innermost tooth (the seventh molar 58).

  Moreover, in 1 of the said application example 3, fundamentally, the 1st engaging part 23 and the 2nd engaging part 24 engage with the same tooth | gear. However, the tooth with which the first engaging portion 23 is engaged and the tooth with which the second engaging portion 24 is engaged may not be completely coincident. For example, you may make it the 2nd engaging part 24 engage with a part of tooth | gear with which the 1st engaging part 23 engages, and what is the tooth | gear with which the 1st engaging part 23 engages? The second engaging portion 24 may be engaged with different teeth.

  In addition, the number of teeth with which the first engagement portion 23 engages is preferably at least three teeth from the viewpoint of suitably dispersing the occlusal force applied to the artificial tooth 10. This also depends on the number of missing teeth, and the first engaging portion 23 is preferably engaged with a number of teeth that is twice or more the number of missing teeth.

  Moreover, in 1 of the said application example 3, the 1st engaging part 23 is provided in the site | part which does not cover an occlusal surface so that original meshing may not be changed. However, conversely, for the purpose of correcting the meshing, the first engaging portion 23 may be provided at a site on the occlusal surface.

  Moreover, in 1 of the said application example 3, the recessed part 25 is provided in the site | part corresponding to each tooth | gear of each of the 1st engaging member 20A and the 2nd engaging member 20B, and the edge part by the side of the occlusion of the recessed part 25 The first engaging portion 23 is provided on the tooth root side end of the recess 25, and the engagement between the engaging members 20A and 20B and the tooth surface is strengthened. I am doing so. However, instead of the surface contact, the first engaging portion 23 and the second engaging portion 24 may be partially engaged.

  Further, in the first application example 3, the base portion 15 of the artificial tooth 10, the first engagement member 20 </ b> A, and the second engagement member 20 </ b> B are each integrally formed by casting. However, the manufacturing method is not limited to casting, and may be cut out by cutting. Further, the artificial tooth 10 and the engaging members 20A and 20B may be integrated by combining separately created ones.

  Moreover, in 1 of the said application example 3, the lock structure 29 is based on the combination of an engagement recessed part and an engagement protrusion. However, the present invention is not limited to this, and any known or well-known lock structure that can be applied to a bending partial denture can be used.

  In the first application example 3, the lock structure 29 is provided on the overlapping surfaces 28a and 28b of the overlapping portions 28 of the first and second engaging members 20A and 20B. However, the present invention is not limited to this, and the lock structure 29 may be provided in another part. For example, the mesial end surface of the first engagement member 20A and the mesial end surface of the second engagement member 20B are provided without providing the overlapping portion 28 of the first and second engagement members 20A, 20B. A lock structure may be provided on the end face after the first state is obtained by abutting.

  Moreover, the partial denture 1 which concerns on 1 of the said application example 3 is a partial denture with respect to the intermediate | middle defect | deletion which the front tooth has missing. However, it may be a partial denture with respect to an intermediate defect in which the missing part 51 is biased to the right side or the left side.

  DESCRIPTION OF SYMBOLS 1 ... Partial denture, 2 ... Crown, 10 ... Artificial tooth, 11 ... Divided surface, 11a ... First divided surface, 11b ... Second divided surface, 12 ... First divided body, 12A ... Base part, 12a ... Occlusal lateral surface, 12b ... root side lateral surface, 12c ... artificial tooth inner surface, 12d ... upright surface, 13 ... second divided body, 13A ... occlusal part, 13B ... outer part, 13C ... base part, 13D: Coating portion, 13a: Artificial tooth occlusal surface, 13b: Root side lateral surface, 13c ... Artificial tooth outer surface, 13d ... Elevated surface, 14 ... Lock structure, 15 ... Base portion, 16 ... Coating portion, 20 ... inner engagement member, 20A ... first engagement member, 20B ... second engagement member, 21 ... mesial side arm part, 22 ... centrifugal side arm part, 23 ... first engagement part 24 ... second engaging portion, 25 ... concave portion, 26 ... crown portion, 27 ... spacer portion, 28 ... 28a, 28b ... overlapping surface, 29 ... lock structure, 30 ... outer engagement member, 31 ... mesial arm part, arm part, 31a ... connecting end part, 32 ... centrifugal arm part, 33 ... Roach part, 33a ... Horizontal bar part, 34 ... Second engaging part, 35 ... Hook, 40 ... Hinge part, 41 ... Pin shaft, 50 ... This model, 50a ... Upright part, 50b ... Margin part, 51 ... Defect portion, 52, 53 ... incisor, 54 ... canine, 55-58 ... molar, 59 ... gum, 60 ... first separation layer, 61 ... second separation layer, 62 ... polymerization resin (base portion), 63 ... wax (surface layer), 64 ... pattern

Claims (4)

On the desired region of the surface of the model made based on the intraoral impression, a first separation layer is formed using a first separation material having rubber elasticity,
A second separation layer is laminated on the first separation layer using an oily second separation material,
On the second separation layer, a polymerization resin is applied or built up to form a pattern base,
After the curing of the polymerization resin, on the base portion, wax is applied or built up to form a surface layer portion of the pattern,
Thereby, a pattern in which the surface layer portion is laminated on the base portion is produced,
A method for producing a pattern for dental casting using the pattern for forming a mold.   2. The method for producing a dental casting pattern according to claim 1, wherein the first separating material is a latex-based separating material, and the second separating material is a petrolatum-based separating material.   The average thickness of said 2nd separated layer is a preparation method of the pattern for dental casting of Claim 1 or 2 smaller than the average thickness of said 1st separated layer.   The average thickness of the said base part of the said pattern is a manufacturing method of the pattern for dental casting of any one of Claim 1 thru | or 3 larger than the average thickness of the said surface layer part of the said pattern.

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