JP3161481U - Non-clasp single tooth denture - Google Patents

Abstract

Provided is a non-clasp single-tooth denture that has an aesthetic property that does not cause backlash, does not cause tightness, and is responsive to the case of a single defect. SOLUTION: An artificial tooth L3, a denture base 20 on which an artificial tooth is provided, and a tooth fitting portion C that is fitted so as to be applied to a toothed tooth and serves as a clasp are provided. The tooth fitting part C is provided only at one end of the denture base 20 and surrounds the opening corresponding to the toothed tooth in a C shape. The inner peripheral surface F along the inner periphery of the concave portion is characterized by standing so as to intersect the back surface 33 of the concave fitting portion. [Selection] Figure 4

Description

  The present invention relates to a non-clasp single-tooth denture, and relates to a non-clasp single-tooth denture excellent in wearing feeling, durability and aesthetics.

In order to overcome the unpleasant discomfort caused by strong restraint such as rust on the dental caries (maintenance teeth) due to the traditional metal clasp, the ridge mucous membrane of the denture base made of resin wings and a large denture base goes beyond the concept of metal clasp Non-clasp dentures (also referred to as non-clasp partial dentures) that have a retaining force by close contact with the skin have been proposed (Non-Patent Documents 1 to 3). All of these non-clasp dentures stably maintain the wearing state by sandwiching the gum from the buccal side and the lingual side with a wing of a thermoplastic resin rich in elasticity or a denture base. As the thermoplastic resin, polycarbonate resin, polyester resin, nylon (polyamide) resin, or the like is used. An example of a non-clasp denture using a nylon resin is shown in FIG. Non-clasp dentures using polyester resin or polycarbonate resin have the same structure based on the same idea as shown in FIG. This is a partial denture that has already been put to practical use in the United States and is called by a name such as Valplast, Lucitone, or Polycarbonate (Non-Patent Documents 1 to 3).
These non-clasp partial dentures 150 are all made of a thermoplastic resin except for artificial teeth. As can be seen from FIG. 6, the tooth (live tooth) for obtaining the maintenance force is put in the opening 161 h almost surrounded by the four circumferences, the wing W of the extended portion of the large denture base 120, and the denture base The tooth and gum of a tooth decay are pinched | interposed with the lingual part. When the partial denture 150 is mounted, the tooth enters the opening 161h that is almost surrounded by the four circumferences, and about 90% or more of the circumference of the tooth is surrounded by the denture base 120.

FIG. 7A is a view of the left part viewed from the buccal side with the non-clasp partial denture 150 shown in FIG. 6 attached to a gypsum model of the patient. It is a figure from the viewpoint which looks up from a little lower side. Here, two points are characteristic.
One is translucent and can be distinguished from the outside, but a protruding line Z in a non-clasp partial denture embedded in a concave bent portion that is a boundary between a tooth and a gum of a tooth is recognized. In FIG. 7A, it is represented as a broken line Z. The protruding line Z fits into a concave bent portion that forms the boundary between the tooth and gum of the patient's tooth decay (life tooth). From the position of the protruding line Z in the wing W of the non-clasp partial denture 150, it is clear that the wing W abuts not only on the tooth of the tooth decay but also on the root gum.
The second relates to end artificial teeth. The artificial teeth L ₅ and L ₆ are embedded and fixed in a denture base 120 made of thermoplastic resin. Not only the end artificial tooth but also the artificial tooth is provided with a T-shaped continuous hole, and a T-shaped resin wire is formed by filling the T-shaped hole with resin. Thus, the artificial tooth is fixed to the denture base. The artificial tooth facing the tooth is called an end artificial tooth. The artificial teeth L ₅ and L ₆ in FIG. 7A face the tooth L ₄ and L ₇ respectively, and both end artificial teeth. It is. In the non-clasp denture 150, in order to make the denture base 120 of the end artificial teeth L ₅ and L ₆ large and to take a large wing W for pinching the tooth gum, the denture base of the end artificial teeth the height B _e of the buccal, taking larger than the tooth portion T _e exposed from denture base end artificial teeth.
The above two points are applicable not only to the left side (L side) of the non-clasp partial denture 150 but also to the right side (R side) as shown in FIG. 7B. That is, in FIG. 7 (b), the has a protruding line Z seen through the wing W of the portion of鉤歯R _5, and buccal height denture base 120 of the end portion artificial teeth R6 facing the鉤歯R5 B _e is made larger than the height T _e of the tooth portion exposed from the denture base 120.

FIG. 8 is a view of the non-clasp partial denture 150 of FIG. 6 as viewed from the back side. It should be noted in FIG. 8 that the gum contact surface on the gum side and the tooth contact surface on the tooth side are the same surface (same curved surface) with respect to the protruding line Z in the opening 161h where the tooth is inserted. It is in the point that the discrepancy is small and continuous as if it were on the top. This point will be described in detail with reference to FIGS. Figure 9 is a view of the wing W of鉤歯R ₅ from the back. FIG. 10A is a cross-sectional view taken along line XA-XA in FIG. FIG. 10B is a diagram showing lines on each contact surface orthogonal to the protruding line Z in FIG. 9 and 10 (a) and 10 (b), in the wing W of the non-clasp partial denture 150, the tooth contact surface and the gum contact surface continuous from the tooth contact surface to the root side have an intersecting angle. little, i.e. theta _N is formed to be close to 180 °. Strictly speaking, the angle formed by the line on each contact surface orthogonal to the projecting line Z does not coincide with the angle formed by the tooth contact surface and the gum contact surface, but is approximated instead. There is no problem. Further, the height Y of the central portion of the wing W is much larger than the thickness d of the central portion of the wing W, and the thickness d is about 20% or less of the height Y.

Here, the above features of the conventional non-clasp partial denture 150 are summarized.
(1) A tooth is put in the opening part 161h surrounded by the four circumferences. About 90% of the circumference is surrounded by the denture base.
(2) The wing W that contacts the tooth decay comes into contact with the tooth and gum of the tooth decay. In the wing W, a protruding line Z is formed corresponding to the concave boundary between the tooth of the tooth decay and the gum. The protruding line Z is located near the center of the wing.
(3) at the end the artificial tooth is an artificial tooth facing the鉤歯, height B _e denture base of the part is greater than the height T _e of the tooth portion exposed from the denture.
(4) In the wing W that contacts the toothed teeth, the tooth contact surface and the gum contact surface do not have a large crossing angle, and continue substantially like the same surface across the protruding line Z.
(5) The thickness d of the wing W is about 20% or less of the height Y of the wing W. The thickness d is about 1 mm or less, for example, and the height Y is about 6.5 mm.

The following can be said about maintaining the mounting state of the non-clasp partial denture.
(K1) The wing W is arranged on the cheek side, the tooth decay and its gum (gingiva) are sandwiched between the denture base on the lingual side, and the maintenance force is to be secured by the elastic force.
(K2) A large contact area between the large denture base (thermoplastic resin) 120 and the ridge mucous membrane is used to obtain a maintenance force.
(K3) In the artificial tooth portion, the denture base is arranged so as to almost completely cover the ridge mucosa. For this reason, the denture base is made thin, and in particular, the thickness of the denture base on the buccal side is made thin and wide. It is customary to have a cherry or pink denture base that is cosmetically implied.
According to the partial denture 150 described above, the burden on the maintenance teeth is reduced and the wearing feeling is improved as compared with the restraint by the conventional bowl-shaped metal clasp. In addition, since no metal clasp is used, aesthetics can be improved if the color of the thermoplastic resin is a healthy food such as cherry. In addition, since a metal clasp is not used, a partial denture can be easily manufactured by injecting a molten thermoplastic resin into a mold in which artificial teeth are arranged, cooling, removing the mold, and adjusting. . That is, the number of processes can be reduced and the production can be performed efficiently.

Valplast Japan website http://www.valplast-japan.com/ Kyoyukai Co., Ltd. website http // www.kyoyukai.co.jp / Arte International website http // www.pi-touch.co.jp

However, the non-clasp denture is gradually loosened as it is used (D1), causing “rattle” in the vertical direction. For this reason, there is an opinion that there are many problems in actually using it for biting and chewing food. However, it is very effective when the main purpose is not to give the other person an impression of missing teeth during a conversation or chat. That is, it is very useful when used as a partial denture for showing the completeness of teeth when not occluded. However, for the purpose of maintaining the integrity of the teeth at the time of non-occlusion only to show, the above-mentioned non-clasp denture is a large swing, and the wing W is (D2) from the tooth of the tooth decay to the gum (the neck). The tightness or breathlessness is great because the cover is tightly covered.
Of particular concern is the case of a patient with only one missing tooth. Even in the case of a single tooth defect, the above-mentioned wing W must be sought for the maintenance force. For this reason, a big wing is provided in the partial denture provided with one artificial tooth. Moreover, in some cases, there is a case where wings are provided on both sides as shown in FIGS. For this reason, the above disadvantage (D2) is still heavy even though the size of the partial denture is small. The above disadvantage (D1) is not overcome. In particular, since a wing is mounted around a small space where one piece is missing, a large deformation is applied at the time of mounting and detachment, so that the wing loosens early.

  An object of the present invention is to provide a non-clasp single-tooth denture that is suitable for the case of the above-mentioned single defect, has little ruggedness, does not cause cramping, and has aesthetics. .

  The non-clasp single-tooth denture of the present invention includes one artificial tooth, a denture base on which the artificial tooth is provided, and a concave fitting portion that is fitted so as to be applied to a toothed tooth and serves as a clasp. This non-clasp single-tooth denture is formed of a thermoplastic resin including a concave fitting portion, and the concave fitting portion is provided only at one end of the denture base and has an opening corresponding to the toothed tooth C The inner peripheral surface is enclosed in a letter shape, and the inner peripheral surface along the inner periphery of the C-shape is standing so as to intersect with the rear surface of the concave fitting portion.

According to the above configuration, the concave fitting portion is securely fitted only on the tooth of the toothed tooth, particularly on the root of the tooth (the tooth on the root side from the ridge) from the lateral direction (horizontal direction). It is possible to obtain a structure that is applied with a resultant force. In the following description, this concave fitting part is called a tooth fitting part because it is fitted only to the tooth.
The C-shape taken by the tooth fitting portion is substantially flat, and the flat surface has a relationship perpendicular to the tooth axis of the tooth. The horizontal direction or horizontal direction is the in-plane direction of the plane on which the C-shape is placed. According to the configuration of the present invention described above, the tooth fitting portion is fitted only to the root portion of the tooth and does not exert fitting force on the gums or gums.
The inner peripheral surface of the tooth fitting portion is limited on the bottom side by the back surface so that it does not extend freely to the gum side. If the tooth fitting part is configured so that the fitting force is applied only to the tooth part, it will be pressed against the gingival side when chewing food, but it will stop at the tooth's ridges even if it repels, so rattling Etc. and does not leave easily.
The partial denture provided with said tooth fitting part is the big characteristic that the whole can be reliably made small. In the present invention, there is only one tooth engaging portion, and therefore only one tooth. Since it is a partial denture of one artificial tooth, it is sufficient that there is only one tooth fitting portion. As a result, downsizing, that is, downsizing can be emphasized. While inserting into a narrow space, one tooth fitting part can be fitted to a corresponding tooth, while slightly adjusting the direction of force. Can be installed with almost one push. Detachment is also possible with a single operation while adjusting the direction of separation by pinching with a finger. During this attachment and removal, the gums are not compressed or tightened at all. In addition, it is normal to forget that the non-clasp single-tooth denture of the present invention is worn when worn. Nevertheless, since it is firmly fitted to the tooth (tooth decay), it can be a well-filled feeling in food chewing.
On the other hand, when the above-mentioned wing or the like abuts against the gingival portion forming a mountain-like slope and exerts pressure, the thermoplastic resin is highly elastic, so when food is chewed, it is pressed against the slope and slides down. Then, when the occlusal pressure disappears, the slope of the denture base part of the gingival slope is easily lifted up and enters the state of separation. For this reason, in the conventional non-clasp denture, since a large portion such as a wing provided for the purpose of increasing the maintenance force hits the gingival slope, it often acts in the direction of promoting separation.
Since the tooth fitting portion is fitted to the lower side of the ridged portion of the toothed hook, the above-described attachment can reliably prevent detachment from the attachment state. Furthermore, since a wing that hits the gums is not used, a comfortable wearing feeling can be obtained except for a cramped feeling. Moreover, since a metal clasp is not used, it is excellent in aesthetics.

In the said invention, there exists a point in the point which used the tooth | gear fitting part by resin for one tooth denture. Compared with a multi-tooth denture, a single-tooth denture has a smaller force on the artificial tooth and a force in the withdrawal direction, and a smaller force for tilting the partial denture during occlusion. For this reason, even if a tooth fitting part is comprised with resin with small rigidity compared with a metal, the resin-made tooth fitting part can maintain and hold | maintain and hold stably stably. As described above, it is possible to maintain and hold firmly while sufficiently promoting downsizing. Furthermore, since the force applied to a single-tooth denture is smaller than that of a multi-tooth denture, it is very easy to mount and disengage from one toothed tooth with only one tooth fitting part. It can be done with almost one touch.
In addition, since a tooth fitting part is formed with the same thermoplastic resin as a denture base, it can be regarded as the extension part of a denture base. For this reason, the back surface of the tooth fitting portion may be referred to as the back surface of the extension portion of the denture base or the back surface of the denture base when the tooth fitting portion is formed in the vicinity of the denture base. Moreover, what kind of thermoplastic resin may be sufficient as said thermoplastic resin.

  The angle formed between the inner peripheral surface facing the opening and the inner peripheral surface and the back surface can be in the range of (right angle −45 °) to (right angle + 45 °). Here, about the back surface of a tooth fitting part, the above-mentioned description that it can be regarded as the back surface of a denture base is applied. By setting the angle formed between the inner peripheral surface and the back surface to be a right angle or within a predetermined angle range from the right angle, the inner peripheral surface can be reliably fitted only to the tooth portion. If the above-mentioned angle is close to 180 °, there is a high possibility that the tooth part will be in contact with the gum continuously from the tooth portion, and the shape is likely to promote the removal from the mounted state. When the angle formed between the inner peripheral surface and the back surface exceeds 135 ° (right angle + 45 °), pressure may be exerted on the gums on the back surface as described above. In other words, the inner peripheral surface is not clearly limited by the back surface on the bottom side, but extends to the gums and exerts pressure. More preferably, the angle is 110 ° (right angle + 20 °) or less. In addition, when the angle is less than 45 ° (right angle −45 °), a portion where the tooth fitting portion becomes thin is locally generated and the rigidity of the tooth fitting portion is lowered, which is not preferable. Therefore, it is good to set it as 45 degrees or more.

  On the inner peripheral surface facing the opening, that is, the tooth contact surface of the tooth fitting portion, there can be no protruding line corresponding to the concave bent portion of the boundary between the tooth portion and the gum portion of the tooth. . As a result, the height (width in the direction of the tooth axis) of the inner peripheral surface of the concave fitting portion is rounded down so as not to be applied to the gums of the tooth decay so that the above-mentioned protruding line is not formed. As a result, the fitting of only the tooth portion of the tooth is ensured.

  The height of the buccal denture base which is the buccal side of the denture base having one artificial tooth, the height of the buccal side exposed tooth which is the buccal tooth part exposed from the denture base of the artificial tooth, Can be made smaller. As a result, a thermoplastic resin portion that fits only to the tooth portion and does not touch the gum can be formed with a gentle slope continuously from the buccal side portion of the denture base to the tooth fitting portion. That is, the height of the buccal denture base is small and small, so it is gently (without sharply rounding up), and it is a thermoplastic resin that fits only on the tooth part of the tooth without touching the gingiva. A made cheek side portion can be formed.

  In one artificial tooth, the buccal side exposed tooth height, which is the height of the tooth part exposed on the buccal side, can be made larger than the lingual side exposed tooth height, which is the height of the tooth part exposed on the lingual side. . Thereby, aesthetics can be improved.

  The C-shaped tooth fitting portion can be arranged so that a larger proportion thereof is located on the lingual side than on the cheek side. As a result, the tooth fitting portion is not conspicuous and the aesthetics can be enhanced.

  According to the present invention, it is possible to obtain a non-clasp partial denture for a single-tooth defect that is less likely to be rattled, does not produce a tight feeling, and has aesthetics.

In embodiment of this invention, it is the perspective view which looked at the non-clasp single-tooth denture with which the gypsum model was mounted | worn from the cheek side (front side). It is the perspective view which looked at the non-clasp single-tooth denture of FIG. 1 from the mesial side. It is the perspective view which looked at the non-clasp single-tooth denture of FIG. 1 from the lingual side (back side). (A) is a perspective view of a non-clasp single-tooth denture as seen from the tooth decay, (b) is a perspective view of the rear face as seen from the tooth decay side, and (c) is a perspective view of the rear face from the cheek side (front side). FIG. (A) is sectional drawing which follows the VA-VA line of FIG.4 (b), (b) is sectional drawing which follows the VB-VB line | wire of FIG.4 (b). It is a perspective view which shows the conventional non-clasp denture. The state which mounted | wore the gypsum model with the conventional non-clasp denture is shown, (a) is a left wing vicinity, (b) is a figure which shows the right wing vicinity. It is the figure which looked at the conventional non-clasp denture from the back side. It is the figure which looked at the opening part of the right side of the conventional non-clasp denture from the back side. (A) is sectional drawing which follows the XA-XA line | wire of FIG. 9, (b) is a figure for demonstrating the angle which the tooth contact surface and gum contact surface which pinch | interposes a protruding line make.

FIG. 1 is a front view showing a state in which a non-clasp single-dent denture (hereinafter referred to as “denture”) 10 according to an embodiment of the present invention is mounted on a gypsum model M. This denture 10 is for the upper jaw, and includes a denture base 20, one resin-made artificial tooth L _3, and a tooth fitting portion C to a toothed tooth (maintenance tooth). All other teeth are vital teeth.鉤歯the tooth fitting portion C is fitted is L _4. Since FIG. 1 is a front view, the buccal side of the denture 10 can be seen. Therefore, the length of the buccal arm 11 forming the tooth fitting portion C to improve aesthetics is short and the degree of exposure is small. The buccal arm 11 is formed of the same resin as the denture base 20 and forms a part of the denture base 20.
In order to improve aesthetics, the buccal height T _e of the artificial tooth L ₃ is considerably larger than the height B _e of the buccal gingival part below it. Such a structure can make white healthy teeth stand out.

FIG. 2 is a view of the denture 10 of FIG. 1 as viewed obliquely from above. Lingual arm 21 forming the tooth fitting portion C is extending out largely to lingual鉤歯L ₄ (back side). This contrasts with the modest extension of the buccal arm 11. FIG. 3 is a view of the denture 10 of FIG. 1 as viewed from the lingual side (back side). In the back, the height T _s of the exposed portions of the artificial teeth L ₃ is smaller than the height T _e of the exposed portion of the buccal, also smaller than the height B _s of the backside of the gingival part. Strong support by the denture base 20 with respect to artificial tooth L ₃ may be viewed as being made by the backside.

  FIG. 3 is a perspective view of the denture 10 of FIG. 1 as viewed from the lingual side (back side). As shown in FIG. 2, the lingual arm 21 of the tooth fitting portion C is fitted to the root side of the tongue side of the toothed tooth L3, that is, the root side of the ridge part K of the toothed tooth L3. Thereby, even if a force in the separation direction is applied to the denture 10, the movement of the lingual arm 21 in the separation direction is hindered by the hoisting portion K, and the separation is prevented. In order to make the buccal arm 11 excellent in aesthetics, it does not extend greatly to the buccal side of the toothed tooth L4. However, as shown in FIG. It is fitted to the base side from the part K. 1 and 3, the denture 10 obtains a maintenance force by fitting the tooth fitting part (the lingual side arm 21 and the buccal side arm 11) C and the ridge part K of the toothed tooth L4 to the root side. I understand that.

FIG. 4 shows the denture 10, (a) is a perspective view when the front side of the denture is viewed from the toothed side, (b) is a perspective view when the back surface of the denture is viewed from the side of the toothed tooth, and (c) is It is the perspective view which looked at the back surface of the denture from the cheek side.
According to Fig.4 (a), the tooth fitting part C is equipped with the above-mentioned tongue side arm 21, the cheek side arm 11, and the tooth contact surface F as main components. The tooth contact surface F is an inner peripheral surface of the tooth fitting portion C or the concave fitting portion C. In the present invention, the tooth fitting portion C includes a denture base 20 for forming the tooth contact surface F, and it is appropriate to grasp it loosely and largely. The thickness d (corresponding to the thickness d in FIG. 10A) in the vicinity of the center of the extended portion of the lingual arm 21 is greater than 1 mm and has a predetermined level or more of rigidity. Since the tooth fitting portion C is constituted by an arm having a high rigidity rather than a small rigidity as in the conventional non-clasp denture wing, a firm fitting is possible.
According to FIG. 4B, it can be seen that the tooth contact surface F stands with respect to the back surfaces 33 and 34. That is, the back surfaces 33 and 34 and the tooth contact surface F intersect at an angle close to a right angle. As will be described later, the angle θ of the intersection is in the range of (right angle −45 °) to (right angle + 45 °). This is the point that clearly distinguishes the structure of the inventive denture from the conventional non-clasp denture. Thus, since the tooth contact surface F stands on the back surfaces 33 and 34, (1) the denture 10 of the present invention can have a large maintenance force, and (2) it can be downsized accordingly. (3) The aesthetics can be improved by downsizing and not using a metal clasp. (4) Since a solid mounting state can be maintained by one tooth fitting portion, mounting and detaching can be performed very easily with almost one touch.
In FIG. 4 (b), the back surface 33 is in close contact with the top of the patient's ridge ridge mucosa (not shown), the back surface 31 is in close contact with the lingual slope (gum) of the ridge ridge mucosa, and the back surface 32 is in the ridge ridge mucosa. Adheres closely to the buccal slope (gum). The back surface 34 is a recess on the back surface for adapting to the shape of the gums, which varies from patient to patient.
According to FIG.4 (c), it turns out that the back surface 33 and the tooth contact surface F are substantially orthogonal. For this reason, the tooth fitting part C fits only on the tooth of the tooth L4, and does not exert a fitting force on the tooth gum or the like. It is due to the structure of the tooth fitting portion C that the wear feeling is so excellent that the user forgets to wear it.

FIG. 5 is a cross-sectional view showing the angle formed between the tooth contact surface F and the back surfaces 33 and 34. FIG. 5A shows an angle θ _N formed between the back surface 33 of the portion that is in close contact with the top of the ridge mucosa and the tooth contact surface F. Further, (b) shows an angle θ _N between the concave back surface 34 provided to adapt to the patient's gingiva and the tooth contact surface F. In the present invention, the angle between the back surface and the tooth contact surface F is defined as the angle formed by the inner peripheral surface of the concave fitting portion and the back surface. However, as shown in FIGS. 5A and 5B, there is no significant difference between the two.
It is appropriate to determine the angle θ _N between the tooth contact surface F and the back surface 33 by grasping both surfaces relatively large.

<Points of non-clasp single tooth denture of the present invention>
In the said invention, there exists a point in the point which used the tooth | gear fitting part by resin for one tooth denture. Compared with a multi-tooth denture, a single-tooth denture has a smaller force on the artificial tooth and a force in the withdrawal direction, and a smaller force for tilting the partial denture during occlusion. For this reason, even if a tooth fitting part is comprised with resin with small rigidity compared with a metal, the resin-made tooth fitting part can maintain and hold | maintain and hold stably stably. As described above, it is possible to maintain and hold firmly while sufficiently promoting downsizing. Furthermore, since the force applied to a single-tooth denture is smaller than that of a multi-tooth denture, it is very easy to mount and disengage from one toothed tooth with only one tooth fitting part. It can be done with almost one touch.

  The embodiment disclosed this time should be considered as illustrative in all points and not restrictive. The scope of the present invention is defined by the terms of the claims, rather than the description above, and is intended to include any modifications within the scope and meaning equivalent to the terms of the claims.

  With the non-clasp single-tooth denture of the present invention, rattling is not likely to occur, a tight feeling is not generated, excellent aesthetics can be obtained, and attachment / detachment can be performed with one touch. At the time of wearing, any food can be chewed without a sense of incongruity.

DESCRIPTION OF SYMBOLS 10 Partial denture, 11 Buccal extension part, 20 Denture base, 21 Tongue extension part, 31 Back surface sticking to lingual gum, 32 Back face sticking to buccal gum, 33 Denture base back face (top of ridge mucosa contacting the rear surface adhesion parts), 34 gums, 120 denture conventional non clasp denture, 150 conventional non clasp denture, opening鉤歯enters at 161h conventional non clasp denture, cheek T _e artificial teeth tooth exposed portion of the side height, B _e buccal denture (gingival) of the height, T _s artificial teeth lingual tooth exposed portion of the height, B _s lingual denture (gingival) Height, B _v conventional non-clasp denture gum contact surface, C tooth fitting part (concave fitting part), d thickness of center of extension part, F tooth contact surface (inner peripheral surface), G contoured section, T _e artificial teeth of the denture base buccal height, Y conventional The height (width) of the center of the non-clasp denture of the non-clasp denture, W W of the conventional non-clasp denture, Z The protruding line of the conventional non-clasp denture, and the angle between the inner surface of θ _N and the back surface .

Claims (6)

A single-tooth denture comprising one artificial tooth, a denture base on which the artificial tooth is provided, and a concave fitting portion to be fitted so as to be applied to a tooth,
The one-tooth denture is formed of a thermoplastic resin including the concave fitting portion,
The concave fitting portion is provided only at one end of the denture base, surrounds the opening corresponding to the toothed tooth in a C shape, and the inner peripheral surface along the inner periphery of the C shape is: A non-clasp single-tooth denture characterized by standing so as to intersect the back surface of the concave fitting portion.   The angle formed by the inner peripheral surface facing the opening and the inner peripheral surface and the back surface is in a range of (right angle -45 °) to (right angle + 45 °). Non-clasp single-tooth denture as described.   The inner peripheral surface facing the opening has no protruding line corresponding to a concave bent portion at a boundary between a tooth portion and a gum portion of the toothed teeth. Non-clasp single tooth denture.   The height of the buccal denture base which is the buccal side portion of the denture base having the one artificial tooth is the buccal side exposed tooth part which is the buccal tooth part exposed from the denture base of the artificial tooth. The non-clasp single-tooth denture according to any one of claims 1 to 3, wherein the non-clasp single-tooth denture is characterized by being smaller than a height.   In the one artificial tooth, the buccal side exposed tooth height, which is the height of the tooth part exposed on the buccal side, is larger than the lingual side exposed tooth height, which is the height of the tooth part exposed on the lingual side. The non-clasp single-tooth denture according to any one of claims 1 to 4. The said C-shaped concave fitting part is arrange | positioned so that the ratio may be located in the tongue side rather than a cheek side, The any one of Claims 1-5 characterized by the above-mentioned. Non-clasp single-tooth denture.

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