JP3064138U - Artificial teeth - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve the state of embedding and fixing in a denture base without impairing the economic merit, homogeneity, and aesthetics of artificial teeth using resin or hard resin, and as a dentured patient An artificial tooth with excellent aesthetics that can be used for a long time with a low risk of falling off from the denture base even when it is worn in the oral cavity and repeatedly receives the mechanical action of occlusal force due to mastication etc. . An artificial tooth comprising a resin or a hard resin, comprising a crown portion and a collar portion embedded in a resin portion of a denture base, wherein the artificial tooth has a bottomed columnar hole in a base surface. A protruding portion is formed on the denture base by filling the columnar holes with resin of the denture base, and the protruding portion sufficiently increases the bonding area with the denture base and prevents separation of the artificial tooth and the denture base. A reinforced structure is created.

Description

[Detailed description of the invention]

[0001]

[Technical field to which the invention belongs]

 This invention relates to an artificial tooth. More specifically, the present invention relates to a resin tooth or a hard resin tooth used for a complete denture or a partial denture.

[0002]

[Prior art]

 Resin teeth or hard resin teeth belong to artificial teeth as well as ceramic teeth, but are widely used because they are cheaper and have a constant quality compared to expensive ceramic teeth.

[0003] A collar portion of a resin tooth or a hard resin tooth (hereinafter, "resin tooth or the like" means "resin tooth or hard resin tooth" unless otherwise specified) is embedded in a resin portion of a denture base. Fixed dentures, such as complete dentures and partial dentures, which are fixed and fixed, must be able to be used for a long period of time without resin dentures falling off from the denture base, and should be dropped in a short period of time. Anything that happens will lead to a dental clinic image down. Generally, in order to prevent the resin teeth or the like from falling off, a slight recess (32a) is formed in the base surface (32) as shown in FIG. 5 as an artificial tooth (31) of the first incisor, or as shown in FIG. A notch step (42a) is formed in the base surface (42) as exemplified as the artificial tooth (41) of the first incisor, and the surface area of the base surface is increased by such depressions and notches, and the collar portion is formed. (33) and (43) have been practiced to increase the bonding area with the resin part when the resin part is embedded in the resin part of the denture base. This is because resin teeth and the like are considered to be easily compatible with the resin part of the denture base and have good adhesiveness. It is seen that the denture falls off in a while. The inventors of the present invention have conducted various studies on the dropout from various aspects. As a result, the cause has not been clarified yet, but it has been concluded that the following reasons <a> to <c> can be considered.

[0004] That is, <a> a denture having a denture or a notch step formed on a base surface as shown in FIGS. In addition, biting force occurs when the food is worn in the mouth and masticated. At that time, the resin teeth and the like have higher hardness than the resin part of the denture base, so the behavior based on the occlusal force due to mastication differs due to the difference in hardness, and stress concentration may occur at the interface between the collar part and the resin part. However, if the mastication is repeated, the interface between the collar part and the resin part is easily peeled or damaged, and the resin teeth etc. fall off the denture base in a relatively short time. Conceivable. <B> A denture with a collar part such as resin teeth embedded and bonded to the resin part of the denture base is usually formed by arranging these teeth on a working model and then forming the denture base with wax. It is common to bury a wax denture in a gypsum mold, fill a cavity formed by flowing wax with a resin paste or rice cake-like material, and polymerize and harden it. Before filling the resin paste, etc. after flowing wax, clean with wax or hot water so that wax does not remain on the surface of the collar or the inner surface of the gypsum mold cavity, but completely remove the wax. It is difficult, and wax slightly remains on the surface of the collar part, and this is considered to have an adverse effect on the adhesion between the collar part and the resin part of the denture base. <C> After wax cleaning with steam or hot water, apply a separating material to the inner surface of the gypsum mold cavity to improve the separation from the resin part of the denture base, and remove excess separating material by air. However, a small amount of separation material remains on the collar part, which is also considered to have an adverse effect on the adhesion between the collar part and the resin part of the denture base.

It is also conceivable to increase the thickness of the resin portion of the denture base, extend the collar portion of the resin teeth and the like, increase the number of embedded portions in the resin portion of the denture base, and enhance the fixation of the resin teeth and the like to the denture base. However, thickening of the resin part reduces the patient's feeling of wearing in the oral cavity, reduces the degree of exposure of the crown from the denture base, and reduces esthetics. It is difficult to say that it is practical.

[0006]

[Problems to be solved by the invention]

 This invention was made as a result of earnest research based on the above viewpoints, and is an artificial tooth made of resin or hard resin, and the collar part of the artificial tooth is embedded in the resin part of the denture base. Even when worn as a fixed denture in the patient's mouth and repeatedly subjected to the mechanical effects of occlusal force due to chewing, etc., these teeth are less likely to fall off and can be used for a long time The aim is to provide artificial teeth with excellent esthetics.

[0007]

[Means for Solving the Problems]

 In order to solve the above-mentioned problem, the artificial tooth of the present invention is an artificial tooth made of resin or hard resin, and is characterized in that a bottomed columnar hole is provided in a base surface of the artificial tooth. According to this, by filling the denture base resin into the bottomed columnar holes provided on the base surface, a projection is formed on the denture base, and it is possible to sufficiently increase the adhesion area between the artificial tooth and the denture base. In addition, the projections provide a mechanically reinforced structure that prevents separation between the artificial tooth and the denture base. As a result, even if the denture using the artificial tooth of the present invention is worn in the oral cavity and mastication is repeated, the artificial tooth does not easily fall off the denture base and can be used for a long time. Become.

[0008] In the manufacture of a denture with artificial teeth using the artificial teeth of the present invention, even if cleaning with steam or hot water is performed after flowing wax and before filling with resin paste or the like, the wax does not affect the surface of the collar portion of the artificial teeth. The separating material is applied to the inner surface of the gypsum mold cavity or the inner surface of the gypsum mold cavity after wax cleaning with steam or hot water, and then the separating material is removed by air. Even if the separation material is slightly left on the collar part, the fixation between the artificial tooth and the denture base can be maintained satisfactorily by the protrusions of the resin of the denture base. In other words, this artificial tooth does not fall off the denture base within a short period of time from the start of use.

[0009] In order to effectively exert the mechanical maintenance and strengthening structure that prevents separation between the artificial tooth and the denture base, for example, in the front teeth, a bottomed columnar hole is provided from the base surface toward the labial side. Preferably, in premolars, a bottomed columnar hole is provided from the basal surface to the buccal side, a bottomed columnar hole is provided from the basal surface to the buccal cusp, or Preferably, the columnar hole is provided parallel to the crown axis from the basal surface toward the occlusal surface, and in the case of molars, a bottomed columnar hole is provided from the basal surface toward the buccal cusp, or It is preferable that the bottomed columnar hole is provided parallel to the crown axis from the basal surface toward the occlusal surface.

The opening position, shape, area, depth, etc. of the bottomed columnar hole on the base surface are determined as described above when the collar portion of the artificial tooth is embedded in the resin portion of the denture base. The area of adhesion to the part can be sufficiently increased, the function of the mechanical maintenance and strengthening structure by the protruding part of the denture base formed by the hole can be fully exhibited, and the filling of the resin paste or rice cake is easy. Considering the fact that when viewed from the labial side or buccal side, the bottomed columnar holes can not be seen through the material of the artificial tooth and the aesthetics can be secured, etc. It may be determined appropriately.

[0011] The depth of embedding of the collar portion of the artificial tooth in the denture base of the present invention in the resin portion of the denture base does not need to be changed as in the past. Aesthetics do not change.

[0012]

[Embodiment of the invention]

 Hereinafter, an embodiment is shown and this invention is explained in more detail. Of course, this invention is not limited by the following embodiments. FIG. 1 shows an example of the artificial tooth of the present invention, which shows an artificial tooth (1) of the first incisor of the upper jaw, (a) is a schematic front view on the lingual side, and (b) is a schematic view on the mesial side. It is a side view. FIG. 2 shows a denture (3) with the artificial tooth (1) shown in FIG. 1 embedded in a denture base (2). As shown in FIG. 1, the artificial tooth (1) of the first incisor has a collar part (4) buried in the denture base (2) when the artificial denture (3) is formed as a denture base (3), and a denture base (2). )) And a crown portion (5) exposed from the same. At a substantially central position of the base surface (6) of the artificial tooth (1), a circular bottomed cylindrical hole (6a) is formed from the base surface (6) toward the lips.

The diameter and depth of the bottomed columnar hole are determined by filling a denture base resin into the bottomed columnar hole provided on the base surface of the artificial tooth, and forming a resin portion. That the area of adhesion with the resin can be sufficiently increased, the function of the mechanical maintenance and strengthening structure by the resin projections can be sufficiently exhibited, that the resin paste or rice cake-like material can be easily filled, and that it is observed from the lip side Considering that the bottomed columnar holes cannot be seen through the material of the artificial tooth when they are closed, the aesthetics can be ensured, etc., and are determined according to the type and size of the teeth.

As shown in FIG. 2, in the artificial denture (3), the collar part (4) of the artificial tooth (1) is embedded in the resin part of the denture base (2), and the base part (6) Resin is filled in the provided bottomed columnar hole (6a) to form a projection (2a), and the collar (4) of the artificial tooth (1) and the resin of the denture base (2) are formed. The interface is in a bonded state. The artificial denture (3) in such a state can be produced by a general technical operation of the artificial denture. For example, after arranging the artificial teeth (1) on a working model, the artificial denture (3) is waxed. A denture base may be formed, the obtained wax denture may be buried in a plaster mold, and a resin paste or rice cake-like material may be filled into a cavity formed by flowing wax and polymerized and cured.

[0015] In the artificial denture (3) shown in Fig. 2, the bonding area between the artificial tooth (1) and the denture base (2) can be sufficiently increased, and the artificial tooth (2a) is formed by the projection (2a). As a result, a mechanical maintenance and strengthening structure for preventing separation between (1) and the denture base (2) occurs, and a denture with artificial teeth (1) shown in FIG. Even if mastication is repeated, the artificial teeth do not easily fall off from the denture base and can be used for a long time.

FIG. 3 shows another example of the artificial tooth of the present invention, which shows an artificial tooth (11) of the upper second premolar, (a) is a schematic front view of the lingual side, and (b) is a close-up view. It is a schematic side view on the side of the heart. FIG. 4 shows a denture with a denture (13) in which the artificial tooth (11) shown in FIG. 3 is embedded in a denture base (12). As shown in FIG. 3, the artificial teeth (11) of the second premolars are, as shown in FIG. 3, a collar part (14) buried in the denture base (12) when forming a denture base (13), and a denture base (12). And an exposed crown (15). At a substantially central position of the base surface (16) of the artificial tooth (11), a circular bottomed cylindrical hole (16a) extending parallel to the crown axis (P) from the base surface (16) toward the occlusal surface. ) Is formed.

In addition, the diameter and depth of the bottomed columnar hole are determined by filling a denture base resin into the bottomed columnar hole provided on the base surface of the artificial tooth, and forming a resin portion. That the area of adhesion with the resin can be sufficiently increased, the function of the mechanical maintenance and strengthening structure by the resin projections can be sufficiently exhibited, that the resin paste or rice cake-like material can be easily filled, and that it is observed from the lip side Considering that the bottomed columnar holes cannot be seen through the material of the artificial tooth when they are closed, the aesthetics can be ensured, etc., and are determined according to the type and size of the teeth.

As shown in FIG. 4, in the artificial denture (13), the color part (14) of the artificial tooth (11) is embedded in the resin part of the denture base (12), and the base surface (16) The resin is filled in the bottomed columnar hole (16a) provided in the base to form a projection (12a), and the collar (14) of the artificial tooth (11) and the resin of the denture base (12) are formed. Interface is in a bonded state. The denture with the denture (13) in such a state can be produced by a general technique operation of the denture with the denture. For example, after arranging the artificial tooth (11) on a working model, the denture with wax is used. A floor is formed, the obtained wax denture is buried in a gypsum mold, and a resin paste or rice cake-like material is filled in a cavity formed by flowing wax and polymerized and hardened.

In the artificial denture (13) shown in FIG. 4, the bonding area between the artificial tooth (11) and the denture base (12) can be sufficiently increased, and the artificial tooth (12) is formed by the projections (12 a). A mechanical maintenance and strengthening structure that prevents separation of the denture base (12) from the denture base (12) is created. A denture with artificial teeth (11) shown in FIG. Even if the procedure is repeated, the artificial tooth does not easily fall off from the denture base and can be used for a long time.

The shape of the bottomed columnar hole provided at the base of the artificial tooth is not limited to a circle, but may be an ellipse, a triangle, a rectangle, or the like.

[0021]

[Effect of the invention]

 Since the present invention is configured as described in detail above, it has the following effects. With the artificial tooth embedded in the denture base without impairing the properties such as economical and uniform quality of the resin or hard resin artificial tooth, the resin is inserted into the bottomed columnar hole provided on the base surface. To form a protruding portion, which can sufficiently increase the bonding area between the artificial tooth and the denture base, and mechanically maintain the protruding portion to prevent separation between the artificial tooth and the denture base. A reinforced structure will result. As a result, even if the denture using the artificial tooth of the present invention is worn in the oral cavity and mastication is repeated, the artificial tooth does not easily fall off the denture base and can be used for a long time. Will be. In the production of dentures using artificial teeth of the present invention, even after cleaning with steam or hot water before filling with resin paste, etc. after waxing, the wax can be used on the surface of the artificial tooth collar or gypsum. The separating material is applied to the inner surface of the cavity of the mold, or to the inner surface of the cavity of the gypsum mold after wax cleaning with steam or hot water, and then the separating material is removed by air. However, even if the separation material may slightly remain on the collar part, the prosthesis of the resin of the denture base can maintain the fixed state between the artificial tooth and the denture base in a good condition. This artificial tooth does not fall off the denture base within a short period of time from the start. The depth of embedding the collar portion of the artificial tooth into the resin portion of the denture base does not need to be changed, and the aesthetics of the denture using the artificial tooth do not change. In addition, since the artificial tooth has a simple bottomed columnar hole at the base, molding is easy and it can be provided at low cost.

[Brief description of the drawings]

FIG. 1 shows an example of the artificial tooth of the present invention, in which (a) is a schematic front view on the lingual side, and (b) is a schematic side view on the mesial side.

FIG. 2 is an explanatory diagram showing a use state of the artificial tooth of FIG. 1;

3A and 3B show another example of the artificial tooth of the present invention, wherein FIG. 3A is a schematic front view on the lingual side, and FIG. 3B is a schematic side view on the mesial side.

FIG. 4 is an explanatory view showing a use state of the artificial tooth of FIG. 3;

FIG. 5 shows an example of a conventional artificial tooth. (A) is a schematic front view on the lingual side, and (b) is a schematic side view on the mesial side.

6A and 6B show another example of a conventional artificial tooth. FIG. 6A is a schematic front view on the lingual side, and FIG. 6B is a schematic side view on the mesial side.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Artificial tooth 2 Denture base 2a Projection part 6 Base surface 6a Column-shaped hole

Claims (7)

[Utility model registration claims] 1. An artificial tooth made of resin or hard resin, wherein a bottomed columnar hole is provided in a base surface of the artificial tooth. 2. The artificial tooth is an artificial tooth for front teeth,
The artificial tooth according to claim 1, wherein a bottomed columnar hole is provided from the basal surface toward the lips. 3. The artificial tooth according to claim 1, wherein the artificial tooth is an artificial tooth for a premolar, and a bottomed columnar hole is provided from a basal surface toward a buccal side. 4. The artificial tooth according to claim 1, wherein the artificial tooth is an artificial tooth for a premolar, and a bottomed columnar hole is provided from a basal surface toward a buccal cusp. . 5. The artificial tooth according to claim 1, wherein the artificial tooth is a premolar artificial tooth, and a bottomed columnar hole is provided parallel to a crown axis from a basal surface toward an occlusal surface. Item 1
An artificial tooth as described. 6. The artificial tooth according to claim 1, wherein the artificial tooth is an artificial tooth for a molar, and a bottomed columnar hole is provided from a basal surface to a buccal cusp. . 7. The artificial tooth is a molar artificial tooth, wherein a bottomed columnar hole is provided parallel to a crown axis from a basal surface toward an occlusal surface. Item 1
An artificial tooth as described.