JP7112616B2 - Artificial tooth piece unit, denture, and method for manufacturing denture - Google Patents

Description

TECHNICAL FIELD The present invention relates to an artificial tooth piece unit, a denture using the artificial tooth piece unit, and a method for manufacturing the same.

Various techniques have been proposed for improving the stability during mastication of dentures constructed by implanting artificial teeth in a denture base (see, for example, Patent Document 1).

In the denture based on this technique, the denture base has a base plate facing the alveolar ridge and a denture base main body made of soft resin in which the root portion of the artificial tooth is embedded. Some or all of the plurality of artificial teeth are not fixed to the base plate, and the artificial teeth that are not fixed to the base plate have holes in their root portions. The denture base body is configured to fit into holes in artificial teeth that are not fixed to the base plate (see [0008] of Patent Document 1, FIGS. 4 to 8).

By configuring in this way, the artificial tooth can have a cushioning property, and excessive occlusal pressure during mastication can be reduced. As a result, the upper and lower alveolar ridges are protected, and mastication efficiency can be improved. As a result, boluses of different thickness and hardness can be simultaneously bitten off and crushed by the left and right sides ( See [0009] of Patent Document 1).

By the way, dentures are required not only to restore the patient's masticatory function but also to restore aesthetics. but may not match.

FIG. 7 is a drawing showing a state in which a conventional denture 91 is attached to an edentulous person whose alveolar ridge (gums) 80 of the maxillary molars has become thin.

As shown in FIG. 7, for example, the thinning of the alveolar ridge (gums) 80 of the maxillary molar region in an edentulous person due to resorption of alveolar bone is from the buccal side to the palatal side (in the case of the right side of the maxilla, the X2 side in the figure). to the X1 side). In the drawing, the positions of the original alveolar ridge 90 and the original molars (second premolars) 93 are indicated by two-dot chain lines.

In this way, when the alveolar ridge 80 of the maxillary molar region has progressed in thinning, the artificial molar 92 is arranged according to the current alveolar ridge 80 in order to prevent the lateral inclination (overturn) of the denture 91 during mastication. , the artificial molars 92 are placed closer to the palatal side (inside) than the position of the original molars 93 of the patient. As a result, the outer width (indicated by Wb in the figure) of the denture 91 at the molar portion of the dental arch becomes narrower than the patient's original outer width of the molar portion of the dental arch, leaving dissatisfaction with the aesthetics of the denture 91. .

On the other hand, if the artificial molars 92 are placed at the positions of the original molars 93 in order to satisfy aesthetics, the dentures 91 tend to overturn during mastication, making mastication difficult.

JP 2017-86582 A

An object of the present invention is to solve such problems and to provide a denture that satisfies both aesthetics and masticatory function.

An artificial tooth piece unit according to the present invention is an artificial tooth piece unit comprising two tooth pieces forming an artificial molar to be combined with a molar portion of a denture base forming a denture. and an inner tooth piece that can be separated and arranged on the palatal side or the lingual side of the molar part of the denture base so as to face the outer tooth piece.

While the features of the present invention have been broadly illustrated above, its configuration and content, together with its objects and features, will become more apparent from the following disclosure when the drawings are taken into consideration.

An artificial tooth piece unit according to a first invention of the present application is an artificial tooth piece unit comprising two tooth pieces forming an artificial molar tooth to be combined with a molar portion of a denture base forming a denture, wherein the molar portion of the denture base and an inner tooth piece that can be separately arranged on the palatal side or the lingual side of the molar part of the denture base so as to face the outer tooth piece. and

Therefore, it is possible to arrange the outer tooth piece at a position where the outer width of the posterior portion of the dental arch of the denture satisfies the aesthetics of the denture, and prevent the denture from tilting to the left or right (overturning) during mastication. An inner tooth piece can be arranged at the position.

In this way, in the denture, both the aesthetics and the masticatory function are satisfied by separately arranging the outer tooth piece mainly responsible for the aesthetics of the dental arch and the inner tooth piece mainly responsible for the masticatory function. Dentures can be realized.

The artificial tooth piece unit according to the second invention of the present application is characterized in that, in the artificial tooth piece unit according to the first invention of the present application, the inner tooth piece has a blade on the occlusal surface.

Thus, by providing the occlusal surface of the inner tooth piece with, for example, a blade having a hardness higher than that of the main body of the inner tooth piece, the masticatory function of the inner tooth piece can be further enhanced.

In addition, even in so-called therapeutic dentures that are highly effective in abrading the opposing teeth by mastication, by using the artificial tooth piece unit, it is possible to realize dentures that satisfy both aesthetics and masticatory function.

The artificial tooth piece unit according to the third invention of the present application is the artificial tooth piece unit according to any one of the first and second inventions of the present application, wherein the outer tooth piece is formed by connecting a plurality of the outer tooth pieces in the row-of-teeth direction. provided as a component of the outer tooth piece coupling that is designed.

Unlike the inner tooth piece, which is mainly responsible for masticatory function, it is less necessary to consider the positional relationship between the outer tooth piece, which is mainly responsible for the aesthetics of the dental arch, and the opposing teeth. It is easier to arrange the artificial molar teeth by collectively arranging on the denture base an external tooth piece connecting body in which a plurality of external tooth pieces forming a dental arch are connected, rather than arranging them separately on the floor.

As a result, it is possible to realize a denture that satisfies both aesthetics and masticatory function while suppressing an increase in man-hours in arranging artificial molars.

A denture according to a fourth invention of the present application is a denture using the artificial tooth piece unit according to any one of the first to third inventions of the present application, comprising a denture base and a denture arranged on the buccal side of the molar portion of the denture base. An outer tooth piece planted on the base, an inner tooth piece separately arranged on the palatal side or the lingual side of the molar part of the denture base so as to face the outer tooth piece and implanted on the denture base, and the outer tooth a connecting tooth piece arranged in a gap between the tooth piece and the inner tooth piece and configured to connect both tooth pieces.

Thus, an artificial molar tooth that satisfies both aesthetics and masticatory function is provided by the outer tooth piece mainly responsible for the aesthetics of the dental arch, the inner tooth piece mainly responsible for masticatory function, and the connecting tooth piece connecting them. Obtainable. By arranging a plurality of such artificial molars in the molar region, it is possible to realize a denture that satisfies both aesthetics and masticatory function.

A method for manufacturing a denture according to the fifth invention of the present application is a method for manufacturing a denture using the artificial tooth piece unit according to any one of the first to third inventions of the present application, wherein The tooth pieces are arranged and planted on the denture base, and the inner tooth pieces are separated and placed on the denture base on the palatal side or lingual side of the molar part of the denture base so as to face the outer tooth pieces. and forming a connecting tooth piece that connects the outer tooth piece and the inner tooth piece in a gap between the outer tooth piece and the inner tooth piece.

In this way, after separately arranging the outer tooth piece mainly responsible for the aesthetics of the dental arch and the inner tooth piece mainly responsible for masticatory function on the denture base, the gap between the outer tooth piece and the inner tooth piece is closed. By forming the connecting tooth piece so as to fill it, it is possible to easily obtain an artificial molar tooth with an arbitrary tooth width that satisfies both aesthetics and masticatory function. By arranging a plurality of such artificial molars in the molar region, it is possible to easily realize a denture that satisfies both aesthetics and masticatory function.

FIG. 1A is a front view showing the configuration of the outer tooth piece connecting body 6. FIG. FIG. 1B is a bottom view showing the configuration of the outer tooth piece connecting body 6. FIG. FIG. 1C is an end view of a cut along line IC--IC shown in FIG. 1A. FIG. 2A is a front view showing the configuration of the inner tooth piece connecting body 7. FIG. 2B is a bottom view showing the configuration of the inner tooth piece connecting body 7. FIG. FIG. 2C is an end view of a cut along line IIC-IIC shown in FIG. 2A. FIG. 3 is a drawing (partial bottom view) showing a part of the wax denture 71 (part near the right side) produced in the manufacturing process of the denture 1. FIG. FIG. 4 is a drawing (partial bottom view) showing part of the denture 1 (part near the right side). FIG. 5 is a drawing showing a coronal section through approximately the center of the artificial molar 20 corresponding to the second premolar of the denture 1. FIG. FIG. 6 is a drawing (partial bottom view) showing part of the denture 101 (part near the right side). FIG. 7 is a drawing showing a state in which a conventional denture 91 is attached to an edentulous person whose alveolar ridge (gums) 80 of the maxillary molars has become thin.

First, a denture 1 that is a full denture for maxillary use (complete denture) according to one embodiment of the present invention will be described.

FIG. 5 is a drawing showing a coronal section through approximately the center of the artificial molar 20 corresponding to the second premolar of the denture 1. FIG. FIG. 4 is a drawing (partial bottom view) showing a part of the denture 1 (part near the right side) when the denture 1 is viewed from below in FIG. 5 (when viewed in the Z1 direction from the Z2 direction end in FIG. 5). is. In addition, since the left side vicinity part of the denture 1 is substantially mirror-symmetrical with the right side vicinity part, description is abbreviate|omitted.

As shown in FIG. 4, the denture 1 includes a denture base 2 and a number of artificial teeth coupled to the denture base 2. As shown in FIG. Among these artificial teeth, artificial molars 10, 20, 30, and 40 corresponding to the molars are arranged in the molar portion 2a of the denture base 2. As shown in FIG. Artificial molars 10, 20, 30, 40 correspond to first premolars, second premolars, first molars, and second molars, respectively. Artificial teeth 3, 4 and 5 correspond to central incisors, lateral incisors and canines, respectively.

As shown in FIG. 5, the denture base 2 includes a base portion 2b formed along the mucous membrane of the lower surface of the patient's maxillary 82, artificial teeth (artificial molars 10, 20, 30, 40, artificial teeth 3, 4, 5, etc.) are connected.

Although the material of the denture base 2 is not particularly limited, for example, it may be composed only of a base resin such as an acrylic resin, which is a general denture base material, or a denture base using both an acrylic resin and a soft resin. Alternatively, a so-called metal floor using metal for the floor portion 2b can be used.

In the molar portion 2a of the denture base 2, an artificial molar 20 coupled to the gingival portion 2c of the denture base 2 (hereinafter sometimes simply referred to as "denture base 2") will be described as an example. The artificial molar tooth 20 has an outer tooth piece 21 , an inner tooth piece 22 and a connecting tooth piece 23 .

The material of the outer tooth piece 21 is not particularly limited, but the material of general artificial teeth (for example, resin teeth such as acrylic resin teeth, hard resin teeth, polycarbonate resin teeth, polysulfone resin teeth, and porcelain teeth). can be made of the same material as

Although the material of the inner tooth piece 22 is not particularly limited, it can be the same material as that of general artificial teeth, like the material of the outer tooth piece 21 .

Although the material of the connecting tooth piece 23 is not particularly limited, it can be the same material as general resin teeth (for example, acrylic resin teeth, hard resin teeth, polycarbonate resin teeth, polysulfone resin teeth).

The outer tooth piece 21 is arranged on the buccal side (X2 side in the figure) of the molar portion 2a of the denture base 2 and is implanted in the denture base 2. As shown in FIG.

The inner tooth piece 22 is separated from the outer tooth piece 21 so as to face the outer tooth piece 21 (facing in the X direction) on the palatal side (or lingual side, X1 side in the drawing) of the molar portion 2a of the denture base 2. , and implanted in the denture base 2.

The connecting tooth piece 23 is arranged so as to fill the gap between the outer tooth piece 21 and the inner tooth piece 22 and is configured to connect both tooth pieces 21 and 22 .

An outer end surface 21a, which is a surface located at the buccal end (X2 side end in the drawing) of the outer tooth piece 21, constitutes the buccal surface of the artificial molar 20. As shown in FIG.

An inner end surface 22 a , which is a surface located at the palatal side end (or lingual end, X1 side end in the figure) of the inner tooth piece 22 , constitutes the palatal side (or lingual side) of the artificial molar 20 .

An outer lower end surface 21d that is a surface located at the lower end (Z2 side end in the drawing) of the outer tooth piece 21, and an inner lower end surface that is a surface located at the lower end (Z2 side end in the drawing) of the inner tooth piece 22 Three continuous surfaces: a side end surface 22d and a connecting lower end surface 23d which is a surface connecting these surfaces 21d and 22d and located at the lower end of the connecting tooth piece 23 (Z2 side end in the drawing). 20 d of occlusal surfaces of the artificial molar tooth 20 are comprised by this.

An outer protrusion 21e, which is a protrusion protruding downward (Z2 direction in the drawing) provided on the buccal side of the outer lower end surface 21d of the outer tooth piece 21, constitutes the buccal cusp of the artificial molar tooth 20, and the inner tooth piece 22 The inner protrusion 22e, which is a protrusion protruding downward (Z2 direction in the figure) provided on the palatal side (or lingual side) of the inner lower end surface 22d of the artificial molar 20, is the palatal cusp (or lingual cusp). Configure.

In the denture 1, the position of the inner protrusion 22e of the inner tooth piece 22 that constitutes the palatal cusp (or lingual cusp) of the artificial molar 20 in the lateral direction (X direction in the figure) corresponds to the alveolar ridge 80 of the upper jaw 82 of the patient. It is constructed so as to substantially coincide with the position in the lateral direction of the top portion 81 of , or to come inside (X1 direction in the figure). By configuring in this way, when the occlusion style of the denture 1 is lingualized occlusion, it is possible to prevent the denture 1 from overturning during mastication.

In addition, in the denture 1, the position of the outer end surface 21a of the outer tooth piece 21 constituting the buccal surface of the artificial molar 20 in the lateral direction (the X direction in the drawing) corresponds to the buccal surface of the patient's original molar 93 (see FIG. 7). ) in the horizontal direction (in this example, substantially the same). By configuring in this way, the outer width (indicated by Wa in the figure) of the artificial molar tooth 20 portion of the dental arch of the denture 1 becomes close to the outer width of the corresponding portion of the patient's original dental arch (this In the example, they are substantially the same), so the aesthetics of the denture 1 are also satisfactory.

The basic configuration of other artificial molars 10, 30, 40 arranged in the molar portion 2a of the denture base 2 shown in FIG. 4 is the same as that of the artificial molar 20 described above. That is, the artificial molar tooth 10 includes an outer tooth piece 11 , an inner tooth piece 12 and a connecting tooth piece 13 . The artificial molar tooth 30 has an outer tooth piece 31 , an inner tooth piece 32 and a connecting tooth piece 33 . The artificial molar tooth 40 includes an outer tooth piece 41 , an inner tooth piece 42 and a connecting tooth piece 43 .

FIG. 1A is a front view showing the configuration of the outer tooth piece connecting body 6 (a view of the outer tooth piece connecting body 6 seen from the buccal side perpendicular to the row of teeth). FIG. 1B is a bottom view showing the configuration of the outer tooth piece connecting body 6. FIG. FIG. 1C is an end view of a cut along line IC--IC shown in FIG. 1A.

As shown in FIGS. 1A and 1B, the outer tooth piece connecting body 6 integrally connects the outer tooth piece 11, the outer tooth piece 21, the outer tooth piece 31 and the outer tooth piece 41 in this order in the row direction. It is formed in That is, in this embodiment, the outer tooth piece 11 , the outer tooth piece 21 , the outer tooth piece 31 and the outer tooth piece 41 are provided as components of the outer tooth piece linking body 6 .

As shown in FIG. 1A, the outer tooth piece 21 is connected to the adjacent outer tooth piece 11 at a part of the outer mesial surface 21f that is the surface on the mesial side, and the outer distal surface that is the surface on the distal side. A portion of the surface 21g is connected to the adjacent outer tooth piece 31 . Other outer teeth 11 , 31 and 41 have the same configuration as the outer teeth 21 .

In this example, the outer tooth piece 11, the outer tooth piece 21, the outer tooth piece 31, and the outer tooth piece 41, which are the components of the outer tooth piece connecting body 6, are formed inseparably from each other.

However, the invention is not limited to this. For example, some or all of the outer tooth piece 11, the outer tooth piece 21, the outer tooth piece 31, and the outer tooth piece 41, which are the constituent elements of the outer tooth piece linking body 6, may be arranged at the boundary with the adjacent outer tooth piece. It can be configured so that it can be separated according to the With this configuration, for example, the position of the buccal side of a specific molar tooth, that is, the position of the outer end face of a specific outer tooth piece, can be adjusted independently of that of other molar teeth according to the relationship with the opposing teeth. Easy to adjust.

Further, two or three adjacent outer tooth pieces among the outer tooth piece 11, the outer tooth piece 21, the outer tooth piece 31 and the outer tooth piece 41 can be used as the outer tooth piece connecting body. Furthermore, without using the outer tooth piece connecting body, the outer tooth piece 11, the outer tooth piece 21, the outer tooth piece 31 and the outer tooth piece 41 are all formed as four mutually independent outer tooth pieces from the beginning. It can also be configured as

As shown in FIG. 1C, the outer tooth piece 21 includes an outer end surface 21a, an outer lower end surface 21d having an outer protrusion 21e, an outer root side end surface 21b, an outer connecting side end surface 21c, and an outer mesial surface 21f (see FIG. 1A). and an outer centrifugal surface 21g (see FIG. 1A).

The external tooth root side end surface 21b is the surface on the root side of the external tooth piece 21, that is, the surface located on the upper side (the Z1 direction side in the drawing) of the external tooth piece 21 and connected to the molar portion 2a of the denture base 2.

The outer connecting side end surface 21c is a surface located at the palatal side end (or lingual end) of the outer tooth piece 21, that is, the end portion opposite to the outer end surface 21a. It is a surface for coupling with the inner connection side end surface 22c of the piece 22 (see FIGS. 5 and 2C).

The configurations of the outer tooth piece 11 , the outer tooth piece 31 and the outer tooth piece 41 are also substantially the same as the configuration of the outer tooth piece 21 .

FIG. 2A is a front view showing the configuration of the inner tooth piece linking body 7 (a view of the inner tooth piece linking body 7 viewed from the palatal side (or lingual side) orthogonal to the dentition). 2B is a bottom view showing the configuration of the inner tooth piece connecting body 7. FIG. FIG. 2C is an end view of a cut along line IIC-IIC shown in FIG. 2A.

As shown in FIGS. 2A and 2B, the inner tooth piece connecting body 7 integrally connects the inner tooth piece 12, the inner tooth piece 22, the inner tooth piece 32 and the inner tooth piece 42 in this order in the row direction. It is formed in That is, in this embodiment, the inner tooth piece 12 , the inner tooth piece 22 , the inner tooth piece 32 and the inner tooth piece 42 are provided as components of the inner tooth piece linking body 7 .

As shown in FIG. 2A, the inner tooth piece 22 is connected to the adjacent inner tooth piece 12 at a portion of the inner mesial surface 22f, which is the surface on the mesial side, and the inner distal surface, which is the surface on the distal side. A portion of the surface 22g is connected to the adjacent inner tooth piece 32 . The inner tooth piece 12, the inner tooth piece 32 and the inner tooth piece 42 also have the same configuration as the inner tooth piece 22. As shown in FIG.

In this example, part or all of the inner tooth piece 12, the inner tooth piece 22, the inner tooth piece 32 and the inner tooth piece 42, which are the constituent elements of the inner tooth piece linking body 7, are arranged at the boundary with the adjacent inner tooth piece. , can be separated as needed. By configuring in this way, for example, depending on the relationship with the opposing teeth, etc., the position of the palatal cusp (or lingual cusp) of a specific molar tooth, that is, the position of the inner protrusion of a specific inner tooth piece, It is easier to adjust independently of that of the other molars.

However, the invention is not limited to this. For example, the inner tooth piece 12, the inner tooth piece 22, the inner tooth piece 32, and the inner tooth piece 42, which are the components of the inner tooth piece linking body 7, can be configured so as to be inseparable from each other.

Further, two or three adjacent inner tooth pieces among the inner tooth piece 12, the inner tooth piece 22, the inner tooth piece 32 and the inner tooth piece 42 can be used as the inner tooth piece connecting body. In addition, all of the inner tooth piece 12, the inner tooth piece 22, the inner tooth piece 32 and the inner tooth piece 42 are formed from the beginning as four mutually independent inner tooth pieces without using an inner tooth piece link. It can also be configured as

As shown in FIG. 2C, the inner tooth piece 22 includes an inner end surface 22a, an inner lower end surface 22d having an inner projection 22e, an inner tooth root end surface 22b, an inner connecting end surface 22c, and an inner mesial surface 22f (see FIG. 2A). and an inner centrifugal surface 22g (see FIG. 2A).

The inner tooth root side end surface 22b is the root side of the inner tooth piece 22, that is, the surface located on the upper side (Z1 direction side in the drawing) of the inner tooth piece 22 and connected to the molar portion 2a of the denture base 2.

The inner connecting side end surface 22c is a surface located at the buccal end of the inner tooth piece 22, that is, the end on the side opposite to the inner end surface 22a, and is located on the outer connecting side of the outer tooth piece 21 via the connecting tooth piece 23. It is a surface for coupling with the end surface 21c (see FIGS. 5 and 1C).

The configurations of the inner tooth piece 12 , the inner tooth piece 32 and the inner tooth piece 42 are also substantially the same as the configuration of the inner tooth piece 22 .

Here, a pair of tooth pieces (that is, an outer tooth piece and a corresponding inner tooth piece) for forming one artificial molar tooth is called an artificial tooth piece unit.

The outer tooth piece 11 and the inner tooth piece 12 constitute an artificial tooth piece unit 14 . The outer tooth piece 21 and the inner tooth piece 22 constitute an artificial tooth piece unit 24 . The outer tooth piece 31 and the inner tooth piece 32 constitute an artificial tooth piece unit 34 . The outer tooth piece 41 and the inner tooth piece 42 constitute an artificial tooth piece unit 44 (refer to FIG. 3).

Next, a method of manufacturing the denture 1 using the outer tooth pieces 11, 21, 31, 41 and the inner tooth pieces 12, 22, 32, 42 constituting the artificial tooth piece units 14, 24, 34, 44 will be described.

FIG. 3 is a drawing (partial bottom view) showing a part of the wax denture 71 (part near the right side) produced in the manufacturing process of the denture 1. FIG.

First, impressions of the intraoral mucosa of the patient's upper jaw 82 and lower jaw (not shown) are taken using an impression material (for example, a dental alginate impression material; not shown) in accordance with conventional methods.

After the impression is taken, a fluidized modeling material (such as gypsum) is injected into the hardened impression material. After the model material has hardened, the impression material is removed and processed as necessary to obtain a working model (not shown) of the upper and lower jaws.

Next, based on the working models of the mandible, occlusal floors (not shown) of the mandible are produced. The occlusal base is a temporary denture base in which a wax ridge (occlusal ridge, not shown) is provided on the foundation 72b (see FIG. 3).

In preparing the occlusal plate, first, a base plate 72b that contacts the mucous membrane surface of the patient is prepared by using instant polymerization resin, a shellac plate, or the like based on the working model.

Next, a substantially horseshoe-shaped paraffin wax material of standard size based on anatomical average values and the like is bonded to the base floor 72b. In this way, a standard maxillary and maxillary occlusal plate is produced.

The prepared standard occlusal plates are attached to the upper and lower alveolar ridges in the oral cavity of the patient in the clinic, and the occlusal height, the size of the dental arch, the position of the front teeth, etc. are adjusted, and the upper and lower jaws are adjusted. are recorded (occlusion registration).

After recording the bite, the occlusal plate holding the recorded interocclusal record is attached to an articulator (not shown) via a working model according to the usual method.

Next, according to the occlusal plane reproduced on the articulator, the artificial teeth are arranged and the gingiva is formed with dental wax according to the usual method, thereby producing the wax denture 71 shown in FIG.

However, the arrangement of artificial teeth in the molar portion of the maxillary occlusal base is performed as follows.

First, the outer tooth piece linking body 6 (see FIG. 3) is arranged on the buccal side of the molar part of the maxillary occlusion base. It is also possible to arrange the outer tooth piece 11, the outer tooth piece 21, the outer tooth piece 31 and the outer tooth piece 41 independently of each other instead of the outer tooth piece connecting body 6.

The external tooth piece connecting body 6 is configured such that the positions of the external end surfaces (outside end surface 21a and others, see FIG. 1B) of the external tooth pieces 11, 21, 31, and 41, which are the constituent elements thereof, are aligned with the original dental arch of the patient's upper jaw. artificial teeth 3, 4, 5 (corresponding to central incisors, lateral incisors, and canines), and the occlusal base of the mandible (not shown) ) (the positions of the molars in the dental arch of the patient's lower jaw).

Next, the inner tooth pieces 12, 22, 32, 42 (see FIG. 3) are arranged on the palatal side (or lingual side) of the molars of the maxillary occlusal base. In this example, the inner tooth piece connecting body 7 (see FIGS. 2A and 2B) is separated at the boundary with the adjacent inner tooth piece and used as mutually independent inner tooth pieces 12, 22, 32, and 42. . It should be noted that it is also possible to use the inner tooth piece connecting body 7 without separating it.

The inner tooth pieces 12, 22, 32, 42 are connected to the outer connection side end surfaces (the outer connection side end surface 21c and others, see FIG. 1B) of the outer tooth pieces 11, 21, 31, 41 constituting the outer tooth piece connecting body 6. It is arranged separately from the outer tooth piece connecting body 6 at a position facing each other.

The positions of the inner tooth pieces 12, 22, 32, 42 in the direction orthogonal to the tooth row (generally vertical direction in FIG. 2B), which can prevent the denture 1 from overturning during mastication, are the denture. It is selected according to the occlusal style, etc.

For example, when the occlusal style of the denture 1 is lingualized occlusion, each inner tooth piece 12, 22 corresponding to the palatal cusp (or lingual cusp) of each artificial molar 10, 20, 30, 40, The position of each of the medial processes 32, 42 (medial process 22e et al., see FIG. 2C) in the lateral direction (X direction in FIG. 5) corresponds to the lateral direction (X direction in FIG. direction) or inward (X1 direction in the figure) is selected as the position of the inner tooth piece 12, 22, 32, 42 in the direction orthogonal to the tooth row. preferably.

A method for specifying such positions (positions that can prevent overturning of the denture 1 during mastication) of the inner tooth pieces 12, 22, 32, 42 is not particularly limited. At the time of acquisition, a pressing force similar to masticatory force is applied to each part of the occlusal bed attached to the upper jaw 82 of the patient using a dental instrument or the like, and a position where the occlusal bed is not overturned is A method of recording on the occlusal plate can be adopted.

In this embodiment, the inner tooth pieces 12, 22, 32, and 42 are arranged after the outer tooth piece connecting body 6 (the outer tooth pieces 11, 21, 31, and 41) are arranged on the occlusal bed. However, the present invention is not limited to this. 31, 41) can also be arranged.

In this way, the artificial teeth are arranged and the gingiva is formed with dental wax, and the wax denture 71 is formed.

As shown in FIG. 3, the wax denture 71 includes a base plate 72b, a wax gingival portion 72c, and a plurality of artificial teeth. The wax gingival portion 72c is a wax gingival portion formed in the above-described gingival formation process using dental wax. The plurality of artificial teeth includes an outer tooth piece connecting body 6 composed of outer tooth pieces 11, 21, 31, 41 and inner tooth pieces 12, 22, 32, 42.

Next, intraoral try-in and adjustment are performed using the wax denture 71 . At this time, the outer tooth piece connecting body 6 and the inner tooth pieces 12, 22, 32, and 42 are also adjusted in position and the like as necessary.

Subsequently, in accordance with conventional methods, wax denture burying (taking an impression of the wax denture 71), flowing wax (in this step, the base 72b is also softened by heating or the like and removed), resin filling for the denture base, and resin polymerization. A denture can be manufactured through processes such as curing, denture removal, and polishing.

Through the steps of embedding the wax denture, flowing wax, filling the resin for the denture base, and polymerizing and curing the resin, the foundation 72b of the wax denture 71 replaces the base 2b of the denture base 2 (see FIG. 4), and the wax of the wax denture 71 is replaced. The prepared gingiva portion 72c replaces the gingiva portion 2c of the denture base 2 (see FIG. 4).

In this embodiment, prior to the wax denture burying step, temporary fillers for filling the gaps between the outer tooth piece connecting body 6 and the inner tooth pieces 12, 22, 32, 42 arranged on the wax denture 71 are provided. It is configured to be filled with a filler (hereinafter referred to as "temporary filler"). Although the material of the temporary filler is not particularly limited, it does not inadvertently melt or come off until the subsequent resin polymerization and curing process, and after the denture removal process, the denture base 2 and the outer tooth piece connection body are used. 6. Those that can be removed separately from the inner teeth 12, 22, 32, 42 are preferred.

In this example, silicone resin is used as the temporary filler, and the process of embedding the wax denture 71 is performed after the temporary filler is filled and hardened.

After the denture removing step, the temporary filler filled in the gaps between the outer tooth piece connecting body 6 and the inner tooth pieces 12, 22, 32, 42 is removed, and the wax denture 71 in FIG. A similar form of denture is obtained.

After removing the temporary filler, connecting tooth pieces are formed in the gaps between the outer tooth pieces 11, 21, 31, and 41 constituting the outer tooth piece connecting body 6 and the inner tooth pieces 12, 22, 32, and 42 facing them. Form strips 13, 23, 33, 43 (see FIG. 4).

For example, the connecting tooth piece 23 is softened so as to fill the gap between the outer connecting side end face 21c (see FIG. 1C) of the outer tooth piece 21 and the inner connecting side end face 22c (see FIG. 2C) of the inner tooth piece 22. It can be formed by filling a general resin tooth material in a state, molding it, and polymerizing and curing it using heat, ultraviolet rays, or the like. The connecting teeth 13 , 33 , 43 can also be formed in the same manner as the connecting teeth 23 .

After that, the denture 1 is completed through processes such as polishing.

In this embodiment, prior to the wax denture embedding process, the gaps between the outer tooth piece connecting body 6 and the inner tooth pieces 12, 22, 32, 42 are filled with a temporary filler. After removing the temporary filler, the gaps are filled with resin tooth material, molded, and polymerized and cured to form the connecting tooth pieces 13, 23, 33, and 43. , but not limited to.

For example, prior to the wax denture embedding process (that is, in the state of the wax denture 71), the gaps between the outer tooth piece linking body 6 and the inner tooth pieces 12, 22, 32, 42 are filled without using a temporary filler. The connecting tooth pieces 13, 23, 33, and 43 can also be formed by directly filling resin tooth material, molding, and polymerizing and curing.

Subsequently, the denture 1 is obtained through processes such as wax denture embedding, flowing wax, denture base resin filling, resin polymerization and curing, denture removal, and polishing.

Furthermore, for the wax denture 71 in the state shown in FIG. It can also be configured to perform each step of waxing, resin filling for denture base, resin polymerization curing, and denture removal. The denture obtained through these steps also has the same appearance as the wax denture 71 in FIG.

In the gaps between the outer tooth pieces 11, 21, 31, 41 constituting the outer tooth piece connecting body 6 of the denture thus obtained and the inner tooth pieces 12, 22, 32, 42 facing them, After forming the tooth pieces 13, 23, 33 and 43 (see FIG. 4) and undergoing processes such as polishing, the denture 1 is completed.

Further, in this embodiment, the occlusal plate (wax denture 71) having the foundation 72b is used to obtain the bite, confirm the position where the occlusal plate is not overturned, and perform intraoral try-in and adjustment. Although the present invention is applied to a denture manufacturing method in which the base 72b of the (wax denture 71) is replaced with the base portion 2b of the denture base 2, the present invention is applicable to such a case. is not limited to

For example, a method of manufacturing dentures in which the base portion 2b of the denture base 2 is first prepared, and the base portion 2b is used to take bite registration, confirm the position where the denture does not overturn, and perform intraoral try-in and adjustment. , the present invention can also be applied.

When the present invention is applied to such a denture manufacturing method, the floor portion 2b can be used as it is without being replaced when performing bite registration, confirmation of the position where the denture will not be overturned, and intraoral try-in and adjustment. The base portion 2b of the denture base 2 of the denture 1 is constructed. For this reason, for example, it is possible to eliminate manufacturing errors and the like due to replacement of the base floor 72b with the floor portion 2b, and it is possible to obtain a more precise denture that conforms to the intraoral mucosa of the patient.

Next, a denture 101 as a maxillary complete denture according to another embodiment of the present invention will be described.

FIG. 6 is a drawing (partial bottom view) showing part of the denture 101 (part near the right side).

As shown in FIG. 6, the denture 101 has inner tooth pieces 112, 122, 132, and 142 instead of the inner tooth pieces 12, 22, 32, and 42 of the denture 1 (see FIG. 4). there is

A blade 122e is provided in a portion corresponding to the palatal cusp (or lingual cusp) (corresponding to the medial projection 22e in FIG. 2C) of the inner lower end surface 122d (corresponding to the inner lower end surface 22d in FIG. 2C) of the inner tooth piece 122. is provided.

Although the shape of the blade is not particularly limited, in this embodiment, a blade 122e having a cross-shaped blade projecting from the inner lower end surface 122d toward the mating teeth is used.

The type and material of the blade 122e are not particularly limited, but for example, hard resin, metal, ceramic, diamond particles or silicon carbide particles fixed to the contact surface with the opposing tooth, etc. are used. be able to. In this example, the blade 122e is made of cobalt-chromium alloy, which has a relatively high hardness.

The timing (timing) of providing the blade 122e to the inner tooth piece 122 is not particularly limited. It can be configured to be provided after creation.

The inner tooth pieces 132 and 142 also have blades 132e and 142e, respectively, and have substantially the same configuration as the inner tooth piece 122. As shown in FIG. The inner tooth piece 112 does not have a blade and has the same configuration as the inner tooth piece 12 in the denture 1 . In addition, it is arbitrary to set the number of blades to be provided on any of the inner tooth pieces and further to set the number of blades to be provided on one inner tooth piece.

The rest of the configuration of the denture 101 is similar to that of the denture 1 .

In each of the above-described embodiments, all the artificial molars constituting the maxillary complete denture (i.e., the first bicuspid, the second bicuspid, the first molar, the second molar corresponding to the left and right total eight ) using an artificial tooth piece unit, the present invention is not limited to this.

For example, the present invention can also be applied to a case where one or more arbitrary artificial molars among the artificial molars constituting the maxillary complete denture are constructed using an artificial tooth piece unit.

In addition, the present invention can be applied to full dentures for the mandible. When the present invention is applied to a complete denture for the mandible, any one or more of the artificial molars constituting the complete denture for the mandible can be configured using an artificial tooth piece unit.

In addition, the present invention can be applied to dentures with dentures (partial dentures) other than complete dentures (complete dentures).

While the present invention has been described above as a preferred embodiment, the terminology is used for purposes of description rather than limitation, and no departures from the scope and spirit of the invention may be made. instead, it can be modified within the scope of the appended claims. Also, while only certain exemplary embodiments of the present invention have been described in detail above, those skilled in the art will appreciate that the exemplary implementations may be modified without departing from the novel teachings and advantages of the present invention. You will readily recognize that many variations in form are possible. Accordingly, all such modifications are intended to be included within the scope of this invention.

1: denture 2: denture base 2a: molar part of denture base 20: artificial molar 21: outer tooth piece 22: inner tooth piece 23: connecting tooth piece 24: artificial tooth piece unit

Claims (4)

An artificial tooth piece unit comprising two tooth pieces constituting an artificial molar tooth to be combined with a molar portion of a denture base constituting a denture, wherein the outer tooth piece is arranged on the buccal side of the molar portion of the denture base. and an inner tooth piece that can be separated and arranged to face the outer tooth piece on the palatal side or the lingual side of the molar part of the denture base, wherein
a denture base;
the outer tooth piece arranged on the buccal side of the molar part of the denture base and implanted in the denture base;
the inner tooth piece, which is arranged separately so as to face the outer tooth piece on the palatal side or the lingual side of the molar part of the denture base and is implanted in the denture base;
a connecting tooth piece arranged in a gap between the outer tooth piece and the inner tooth piece and configured to connect the two tooth pieces, the connecting tooth piece being made of the same material as a general resin tooth ;
having
A denture characterized by: In the denture of claim 1,
said inner tooth piece of said artificial tooth piece unit has a blade on its occlusal surface;
A denture characterized by: The denture according to any one of claims 1 to 2,
The outer tooth piece of the artificial tooth piece unit is provided as a constituent element of an outer tooth piece connecting body formed by connecting a plurality of the outer tooth pieces in the row-of-teeth direction;
A denture characterized by: A method for manufacturing a denture according to any one of claims 1 to 3,
The outer tooth piece is placed on the buccal side of the molar part of the denture base and implanted in the denture base, and separated on the palatial side or the lingual side of the molar part of the denture base so as to face the outer tooth piece. Arranging the inner tooth piece and implanting it in the denture base,
forming a connecting tooth piece that connects the outer tooth piece and the inner tooth piece in a gap between the outer tooth piece and the inner tooth piece;
A method of manufacturing a denture, characterized by:

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