JP2001137261A - Denture and artificial tooth - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a denture with excellent occulusal balance. SOLUTION: At a center occlusal position, the respective supporting cusps 32 and 52 of a maxillary second premolar 30 and a maxillary first molar 50 make contact with the bottoms of the corresponding occlusal surfaces S4 and S6 of a mandibular second premolar 40 and a mandibular first molar 60, and an imaginary plane encompassing the supporting cusp tip 32a of the maxillary second premolar 30 and the supporting cusp tip 52a of the maxillary first molar 50 is approximately parallel to an occlusal plane P. Also, an imaginary plane encompassing the tip of the occlusal plane contact area R4 of the mandibular second premolar 40 and the tip of the occlusal plane contact area R6 of the mandibular first molar 60 is approximately parallel to the occlusal plane P. During forward movement and/or lateral movement for mastication, the respective supporting cusps 32 and 52 of the maxillary second premolar 30 and the maxillary first molar 50 can make contact with the respective occlusal surfaces S4 and S6 of the mandibular second premolar 40 and the mandibular first molar 60.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an occlusion
The present invention relates to dentures and artificial teeth capable of improving functions.
Further, the present invention relates to an adjusting method for adjusting a denture to such a shape. Further, the present invention relates to a method for treating and preventing various symptoms due to the occlusion obtained by such a denture having a specific shape.

[0002]

2. Description of the Related Art In recent years, the causal relationship between occlusal abnormalities and systemic symptoms (headache, stiff shoulders, back pain, etc.) has been studied. For example, it has been reported that various systemic symptoms were improved by adjusting the denture state of a patient by adjusting a complete denture or wearing a splint in the oral cavity (eg, Shoji Nakamura, Occlusion-related factors and their diagnosis and treatment ”: PJAOcclusion.Heal
th.Vol.1 (1995)).

[0003] On the other hand, conventional dentures are designed and manufactured so as to have shapes and functions equivalent to those of human natural teeth in principle because they are used as substitutes for natural teeth. Therefore, the shape of the occlusal surface of the molar has been designed and constructed so as to have the same shape as the occlusal surface of the natural molar (premolar and / or molar). Hereinafter, the typical shape and the movement at the time of mastication in the artificial molars constituting the conventional denture will be described. FIG. 8 shows a conventional artificial molar 100, 1
FIG. 10 is a cross-sectional view showing a pair of opposing pairs (that is, the upper molar 100 and the lower molar 110 that are occlusal) in a state in which 10 (here, the left first molar is illustrated) is occluded. In this figure and FIG. 8 described later, the artificial molar 10
0,110 is viewed from the distal side (rear), the left side of the drawing is the cheek side and the right side is the lingual side.

As shown in FIG. 8, artificial molars 100, 11
The 0 occlusal surfaces 102 and 112 have ridges called cusps similar to natural molars, and a so-called mastication movement is performed by the cusps of the opposing molars sliding together. That is, as shown in FIG.
The occlusal surfaces 102, 112 at 0, 110 are generally roughly conical cusps 10 on the buccal and lingual sides, respectively.
4, 106, 114 and 116 are formed. Thus, in the normal occlusal state where the masticatory movement is not performed (the cusp fitting position in the normal state in which the chin is normally closed: hereinafter referred to as “center occlusal position”), as shown in FIG. , Maxillary molars 1
00 lingual cusps 106 are fitted into the depressions (central groove portions) between the two cusps 114 and 116 of the mandibular molar 110, and the buccal cusps 114 of the mandibular molar 110 are connected to the two molars 100 of the maxillary molar 100. A state of fitting into the depression (center groove portion) between the cusps 104 and 106 is formed. In this state of central occlusion, the molars 100 and 110 come into contact with the opposing molars at three different positions (three sites) on the occlusal surface indicated by contact points A, B and C in FIG. Is in point contact with the occlusal surface).

[0005] By performing lower jaw movement such as lateral movement (chewing movement) during mastication, the lingual cusp 106 of the upper molar 100, which is a supporting cusp (functional cusp).
The food and the like are chewed and crushed between the buccal cusp 114 of the lower molar 110 and the lower molar 110. That is, as shown in FIG. 9, the lingual cusp 106 of the maxillary molar 100 and the buccal cusp 114 of the mandibular molar 110 with the movement of the lower jaw during mastication are respectively guided cusps (non-functional cusps).
Is guided laterally along the cusp surface while making contact with the lingual cusp 116 of the lower molar 110 and the buccal cusp 104 of the upper molar 100 (see contact points D and E in FIG. 9). Becomes The vertical movement between the position (center occlusal position) shown in FIG. 8 and the position related to the lateral movement as shown in FIG. The up-and-down movement and the like of the maxillary artificial molar 100 and the mandibular artificial molar 110 achieve chewing and crushing of food and the like.

[0006]

As described above, although dentures are prepared in consideration of the shape and function of the upper and lower artificial teeth (particularly molars) to be matched, conventionally, when dentures are entirely occluded, The occlusal force balance (for example, between adjacent molars and corresponding left and right molars) and the position of the occlusal center of gravity were not considered much. Accordingly, from the viewpoint of preventing systemic symptoms associated with the above-mentioned occlusal abnormality, provision of dentures in consideration of not only the shape of each tooth but also the occlusal force at the time of occlusion (chewing) and a shape capable of embodying the same are provided. The development of artificial teeth (molars) is desired.

The present invention has been made in view of the relationship between the above-mentioned occlusal abnormality and systemic symptoms, and an object of the present invention is to provide an occlusal structure which can easily maintain the overall balance of occlusal force during occlusion. And at the same time, to provide a denture suitable for forming such an occlusal structure and each artificial tooth (molar) constituting the denture.

[0008]

In order to achieve the above object, the present invention provides a denture having artificial teeth corresponding to at least one of a second premolar and a first molar of upper and lower jaws. The obtained artificial tooth provides a denture formed to have the following characteristics in relation to the upper and lower second premolars and the first molar other than the artificial tooth. That is, one feature that can specify the denture of the present invention is that the virtual plane including the supporting cusp of the upper second premolar and the supporting cusp of the upper first molar is substantially parallel to the occlusal plane. It is becoming. Another feature is that an imaginary plane including the bottom of the occlusal contact area formed on the occlusal surface of the lower second premolar and the lower first molar is substantially parallel to the occlusal plane. That is. Another feature is that, in the central occlusal position, the supporting cusp of the upper second premolar and the supporting cusp of the upper first molar are on the occlusal surface of the lower second premolar and the lower first molar. Contacting the bottom of each corresponding mating tooth contact area to be formed. Hereinafter, in the present specification, such a denture is also referred to as a first denture.

[0009] In the present specification, "occlusal surface" means
Unless otherwise stated, the part facing the so-called cusp and confronting teeth (typically the anatomical occlusal surface)
Say. Further, in the present specification, the “occlusal plane” is substantially parallel to a virtual occlusal plane determined by the operator based on the Campel plane and the Frankfurt plane at the intercuspal position (center occlusal position) unless otherwise specified. It refers to one plane that includes at least a part of the occlusal surface of the molar part in a positional relationship. In the first denture of the present invention, as a result of the above features, a balance at the time of occlusion can be obtained in the occlusal region from the second premolar to the first molar. For this reason, according to the denture of the present invention, it is easy to maintain the left-right and front-rear balance of the occlusal force at the time of clenching, while it is possible to suppress the occlusal force from becoming unbalanced right-left and back-and-forth. Therefore, according to the denture of the present invention, it is possible to suppress the occurrence of systemic symptoms associated with occlusal abnormalities.

[0010] Further, in the present invention, in the above denture, the virtual plane including the apex in the opposing tooth contact area formed on the occlusal surface of the lower second premolar and the lower first molar is formed with respect to the occlusal plane. A denture (hereinafter, also referred to as a second denture in the present specification) formed to be substantially parallel is also provided. According to this denture, it is easy to obtain a stable occlusion during mastication.

The present invention also relates to any of the above dentures, wherein the supporting cusp of the upper second premolar and the supporting cusp of the upper first molar are occlusal surfaces of the lower second premolar and the lower first molar. A denture (hereinafter, referred to as a denture) formed so as to be able to simultaneously contact the corresponding opposing tooth contact areas formed on the
In this specification, it is also referred to as a third denture. ) Is also provided. According to this denture, a stable occlusion can be easily obtained at the time of mastication such as at the time of forward movement and at the time of lateral movement.

The present invention also relates to any of the above-mentioned dentures provided with artificial teeth corresponding to at least one of the second premolars and the first molars of the lower jaw, wherein the artificial teeth are formed on the occlusal surface of the artificial teeth. The shape of the contact area of the opposing teeth is as follows: (a) sagittal incisor path angle ≧ sagittal condylar path angle; and (b) lateral incisor path angle>
A denture (hereinafter, also referred to as a fourth denture in the present specification) having a sagittal condyle angle. According to this denture, the occlusal balance can be obtained in the occlusal range from the lower second premolar to the lower first molar. Also,
A stable occlusion can be obtained during mastication.

[0013] A further preferred denture according to the present invention is any of the above-mentioned dentures provided with artificial teeth corresponding to at least one of a lower second premolar and a lower first molar. The occlusal surface of the artificial tooth The opposing tooth contact area formed on the surface is smooth,
It is a denture (hereinafter, also referred to as a fifth denture in the present specification). In such a denture, at the time of occlusion, the contact between the upper molar (cusp) and the corresponding lower molar (occlusal surface contact area) is always performed stably. Therefore, it is possible to smoothly perform lateral movements and the like during chewing,
It can contribute to preventing imbalance in occlusal force.

[0014] Further, an artificial tooth corresponding to at least one of the first and second molars of the upper and lower jaws is provided.
Any of the foregoing dentures may have the following features: the occlusal surface of the provided lower artificial tooth is substantially parallel to the occlusal plane; and / or encompasses the supporting cusp of the provided upper artificial tooth. The virtual plane also provides a denture (hereinafter, also referred to as a sixth denture in the present specification) formed to be substantially parallel to the occlusal plane. In the denture further having such characteristics, the contact of the second premolar and the first molar during the occlusion is inhibited by the upper and lower jaw-equipped artificial teeth corresponding to the first and / or second molars. Never do. Therefore, a well-balanced occlusion can be maintained at a higher level.

[0015] Other preferred denture forms include:
In any of the dentures described above, a denture including artificial teeth corresponding to at least the upper and lower jaw second premolars and the first molars, wherein the upper jaw second premolars and the first molars have the same hardness. With, the lower second premolar and the first molar of the lower jaw have the same hardness, the lower second premolar and the first molar are the hardness of the upper second premolar and the first molar. A denture having the same or lower hardness (hereinafter, also referred to as a seventh denture in the present specification). According to this denture, since the hardness of the upper and lower jaw second premolars and the first molars is well balanced, a good occlusion can be stably obtained. In particular, good occlusion is obtained over a long period.

The denture further includes artificial teeth corresponding to the first and second premolars of the upper and lower jaws, respectively, and the second premolar and the first molar of the upper jaw are the first premolars of the upper jaw. The hardness of the premolars and second molars is equal to or higher than the hardness of the lower second molars and the first molars. Preferably, it has a higher hardness. With this configuration, stable occlusion can be obtained in a more preferable state.

In the dentures of the present invention, it is preferable that all teeth make a one-to-one tooth-to-bite contact at the central occlusal position.

Further, in the above-mentioned denture, it is preferable that one-to-one tooth-to-bite contact can be obtained at the central occlusal position. More preferably, a one-to-one tooth occlusal contact is obtained during the lateral movement and the forward movement. The upper second premolar and the first molar are preferably connected artificial teeth, and the lower second premolar and the first molar are also preferably connected artificial teeth.

The present invention also provides a denture having the following lower molars. That is, a denture provided with artificial teeth corresponding to the lower second premolar and the first molar,
The following feature; an imaginary plane including the bottom in the occlusal contact area formed on the occlusal surface of the lower second premolar and the lower first molar is substantially parallel to the occlusal plane; and An imaginary plane containing the apex in the opposing tooth contact area formed on the occlusal surface of the second premolar and the lower first molar also provides a denture formed to be substantially parallel to the occlusal plane. Further, a denture having an artificial tooth corresponding to one or more of the lower second premolar and the lower first molar, and the shape of the opposing tooth contact area formed on the occlusal surface of the artificial tooth is as follows: Also provided is a denture having the following angular conditions: (a) sagittal incisor path angle> sagittal condylar path angle; and (b) lateral incisor path angle> sagittal condylar path angle. A denture provided with artificial teeth corresponding to one or more of the lower second premolar and the lower first molar, and the opposing contact area formed on the occlusal surface of the artificial tooth is smooth. Also provide dentures.

A denture having artificial teeth corresponding to at least one of a lower first premolar and a second molar, wherein the bottom of the occlusal surface of the artificial tooth is substantially parallel to the occlusal plane. Provide dentures. Further, a denture provided with artificial teeth corresponding to the lower first premolar, the second premolar, the first molar, and the second molar, respectively, and each occlusal surface of the first premolar and the second molar Are substantially parallel to the occlusal plane, each bottom of each occlusal surface of the second premolar and the first molar is substantially parallel to the occlusal plane, and the first premolar and the second molar are Located below each bottom of each occlusal surface of
Provide dentures.

The present invention also provides a denture having the following upper molars. That is, the first premolar of the upper jaw, the second premolar, the first molar, and a denture provided with artificial teeth corresponding to the second molar, respectively, in the central occlusal position, the first premolar and the second premolar Each supporting cusp of the molar is arranged at the same height, and each supporting cusp of the second premolar and the first molar is higher than the position of each supporting cusp of the first premolar and the second molar. Providing a denture configured to be positioned below and at the same height, further comprising a line connecting the supporting cusps of the first premolar and the second molar, and the second premolar and the The line connecting each supporting cusp of one molar also provides a denture, each substantially parallel to the occlusal plane.

The present invention also provides the following artificial teeth. An artificial tooth corresponding to the lower second premolar or the lower first molar, and the shape of the opposing contact area formed on the occlusal surface of the artificial tooth is as follows: (a) sagittal cutting Tooth angle ≥ sagittal condyle angle; and (b) lateral incisor angle>
Providing an artificial tooth having a sagittal condylar angle. The present invention also provides an artificial tooth that is an artificial tooth corresponding to the lower second premolar or the lower first molar, and the opposing contact area formed on the occlusal surface of the artificial tooth is smooth. In addition, artificial teeth corresponding to the lower second premolar and the lower first molar, and the shape of the opposing tooth contact area formed on the occlusal surface of each artificial tooth are as follows: (a) Arrow Incisor tract angle ≥ sagittal condyle tract angle; and (b) lateral incisor tract angle>
An artificial tooth comprising and connected with a sagittal condylar angle. Further, a first premolar of the lower jaw, a second premolar, a first molar, and a set of artificial teeth including artificial teeth corresponding to the second molar, wherein the set of the second premolar and the first molar The shape of the opposing contact area formed on each occlusal surface is determined by the following angle conditions: (a) sagittal incisor path angle ≧ sagittal condylar path angle; and (b) lateral incisor path angle>
Sagittal condyle path angle; and the shape of the opposing contact area of each occlusal surface of the first premolar and the second molar is as follows: (a) sagittal incisor path angle ≧ Sagittal condylar tract angle; and (b) lateral incisor tract angle>
Or a set of artificial teeth having a sagittal condylar tract angle; or having a more gentle shape than a shape that satisfies this angular condition. Furthermore, artificial teeth corresponding to the upper second premolar and the upper first molar, wherein the artificial tooth has only a lingual cusp as a mating contact site, and the lingual cusp is substantially spherical. The teeth are also connected, also providing artificial teeth.

[0023]

DETAILED DESCRIPTION OF THE INVENTION The present invention is a denture and an artificial tooth suitable for obtaining a specific occlusal structure. Such an occlusal structure is a structure (hereinafter, also referred to as a first occlusal structure) in which two occlusal contacts can be obtained at two right and left teeth of the second premolar and the first molar of the upper right and left jaws. Say. More preferably, a structure in which occlusal contact at four points is obtained from the lingual cusp of the upper first molar to the mesial lingual cusp of the upper first molar from the left and right maxillary second premolars (hereinafter, also referred to as the second structural structure) Say.)
It is. In these four-point support occlusal structures, it is preferable that a uniform contact state is formed on the left and right.

Further, a preferred occlusal structure is the first occlusal structure, wherein the upper first premolar and the upper second molar are in occlusal contact at four points by the upper second premolar and the upper first molar. (Hereinafter, also referred to as a third occlusal structure). Specifically, in the central occlusal position, the maxillary first premolars and the second molars make point-to-point occlusal contact (total eight points of occlusal contact), respectively. It is preferred that the premolar and the second molar do not make occlusal contact.

The first to seventh dentures of the present invention, the upper molar denture, and the lower molar denture (hereinafter, referred to as the denture of the present invention).
According to this, such an occlusal structure can be obtained as it is or by easy adjustment. Therefore, the present invention also provides a method of manufacturing a denture using any of the dentures of the present invention so as to obtain any of the first to third occlusal structures.

The present invention also provides a denture according to any one of the dentures of the present invention, the denture having any one of the first to third occlusal structures.

Further, by using any of the dentures of the present invention to adjust the occlusal force so as to obtain the above-described occlusal structure, symptoms that are considered to be associated with occlusion (hereinafter referred to as occlusal-related symptoms) Is improved or prevented. According to these dentures, the above-described preferable occlusal structure can be obtained. Accordingly, the present invention also provides a method for ameliorating and treating occlusal-related symptoms using any of the dentures of the present invention. At the same time, the present invention also provides a method for preventing occlusion-related symptoms using any of the dentures of the present invention. The main symptoms found as occlusal-related symptoms are migraine, headache such as tension-type headache, stiff shoulders, back pain, back pain, knee pain, limb tremor, numbness and pain, eye pain, eye strain. , Flying mosquitoes,
If you have tinnitus, hearing loss, insomnia, malaise, or high blood pressure.

Each of the first to seventh dentures of the present invention has artificial teeth corresponding to three or more teeth on the upper or lower jaw side of the second premolar and the first molar on the left and right upper and lower jaws. It is preferable to provide artificial teeth corresponding to three or more teeth for each of the upper and lower jaws, and more preferably to provide artificial teeth corresponding to all these teeth (ie, a total of eight teeth). Is preferred. Particularly preferred dentures of the present invention are described below. (1) A denture provided with artificial teeth corresponding to at least each of a second premolar and a first molar of the left, right, upper and lower jaws, and has the following features: a support cusp of the upper second premolar and an upper first molar The imaginary plane encompassing the cusp of the supporting cusp is approximately parallel to the occlusal plane; it encompasses the bottom of the occlusal surface of the lower second premolar and lower first molar in the opposing tooth contact area The virtual plane is approximately parallel to the occlusal plane;
In the central occlusal position, the supporting cusp of the upper second premolar and the supporting cusp of the upper first molar are respectively corresponding opposing teeth formed on the occlusal surface of the lower second premolar and the lower first molar. Contacting the bottom of the contact area;

(2) An imaginary plane including an apex in an opposing contact area formed on the occlusal surface of the lower second premolar and the lower first molar is substantially parallel to the occlusal plane. The denture according to the above (1), which is formed so as to have.

(3) The supporting cusp of the upper second premolar and the supporting cusp of the upper first molar correspond to the corresponding opposing teeth formed on the occlusal surface of the lower second premolar and the lower first molar, respectively. The denture according to the above (1) or (2), wherein the denture is formed so as to be able to simultaneously contact the contact area.

(4) The shapes of the opposing contact areas formed on the occlusal surface of the lower second premolar and the lower first molar are as follows: (a) Sagittal incisor path angle ≧ Sagittal condyle angle; and (b) Lateral incisor angle>
The denture according to any one of (1) to (3), having a sagittal condyle angle. (5) The opposing tooth contact area formed on the occlusal surface of the provided mandibular artificial tooth has a smooth surface.
The denture according to any one of (4). (6) It has artificial teeth corresponding to the first and / or second premolars of the upper and lower jaws, and has the following features: the occlusal surface of the provided lower first and / or lower second molars is provided. ,
An imaginary plane containing each supporting cusp of the provided upper first premolar and / or upper second molar is substantially parallel to the occlusal plane; The denture according to any one of the above (1) to (5). (7) The shape of the occlusal contact surface of the occlusal surface of the artificial tooth corresponding to the first premolar and / or the second molar of the lower jaw is as follows: (a) Sagittal incisor path angle ≧ Sagittal condylar tract angle; and (b) lateral incisor tract angle>
The denture according to the above (6), which has a sagittal condylar angle; or has a shape that is gentler than a shape that satisfies this angle condition. (8) The denture according to any one of (1) to (6), wherein a one-to-one tooth-to-bite contact is obtained in the central occlusal position. (9) The denture according to (8), wherein one-to-one tooth-to-bite contact is obtained during the lateral movement and the forward movement. (10) The denture according to any one of (1) to (9), wherein the second premolar and the first molar of the upper jaw are connecting teeth.

Further, the artificial tooth of the present invention is an artificial tooth suitable for obtaining the above-mentioned occlusal structure and for obtaining the above-mentioned denture.

Hereinafter, a preferred embodiment of a denture according to the present invention will be described with reference to the drawings. In addition, FIG. 1 shows an artificial tooth 10 corresponding to a maxillary first premolar, a second premolar artificial tooth 30, a first molar equivalent artificial tooth 50, and a left buccal upper premolar, which constitute the denture of the present invention according to the present embodiment. The second molar-equivalent artificial tooth 70 and the lower jaw-side lower first premolar-equivalent artificial tooth 20, the second premolar-equivalent artificial tooth 40, the first molar-equivalent artificial tooth 60, and the second molar-equivalent artificial tooth 80 FIG. 4 is a schematic diagram showing the state of the central occlusal position as viewed from the buccal side after being arranged at a predetermined position, and showing a line connecting the supporting cusps of the upper molars 10, 30, 50, 70 (as viewed from the occlusal surface). In these cases, these support cusps are arranged in a substantially straight line). Note that the virtual plane indicated by the reference symbol P in FIG. 1 is an occlusal plane.

FIG. 2 is a schematic view showing a state of the denture according to this embodiment at the time of forward movement in a manner similar to FIG. FIG. 3 is an arrangement plan view schematically showing the state of the occlusal surface of each of the mandibular-side artificial molars 20, 40, 60, and 80 according to the present embodiment. FIG. 4 is a schematic diagram showing the occlusal state of each opposing tooth in the state of FIG. 1 (center occlusal position), with a line passing through the supporting cusp of each of the upper molars 10, 30, 50, 70. It is represented by a cross section from the buccal side (left side as viewed) to the lingual side (right side as viewed). (A), (b), (c) and (d) in FIG. 4 respectively show artificial teeth 10 and 20 corresponding to first and second premolars, artificial teeth 30 and 40 corresponding to second premolars, and first molars corresponding to upper and lower jaws, respectively. The occlusal state of the artificial teeth 50 and 60 and the second molar equivalent artificial teeth 70 and 80 is shown. FIGS. 5 and 6 are schematic diagrams each showing a cross-sectional view of one occlusion state of each opposing tooth on the working side and the equilibrium side during lateral movement in the same manner as in FIG.
4 (b), (c) and (d) show the artificial teeth 10, 20 corresponding to the first premolars, the artificial teeth 30, 40 corresponding to the second premolars, and the artificial teeth corresponding to the first molars of the upper and lower jaw, respectively, as in FIG. 50, 60
And an occlusal state of the second molar equivalent artificial teeth 70 and 80. The following description and drawings relating to the denture according to the present embodiment are all on the left cheek side, but in the present embodiment, similar artificial molars are provided symmetrically on the right cheek side. Further, since it is clear that all of the molars shown in the present embodiment are artificial teeth, only the type of molar is described in the following description, and it is not described that the tooth is an artificial tooth.

As shown in FIGS. 1 and 3, the molars 10, 20, 30, 40, 5 constituting the denture according to this embodiment are shown.
Nos. 0, 60, 70 and 80 have a rough appearance similar to that of a conventional denture, similar to that of a conventional denture, and are typically formed of ceramic, metal or plastic (resin). This is an artificial molar. In addition, similarly to the conventional artificial molars, they are arranged and mounted at a predetermined position in the oral cavity via an appropriate denture base material or directly.

First, each of the lower molars 20, 40, 60,
The shape of 80 and the arrangement state will be described. As shown in FIGS. 1 and 4, the occlusal surfaces S of the lower first premolars 20 and the second molars 80 have a substantially flat shape (substantially flat) having no prominent protrusion when these teeth are viewed from the side. Shape). The occlusal surfaces of the lower second premolars 40 and the first molars 60 may be formed in a dish shape that is approximately the same as the shape of the opposing tooth contact area or a gentler shape. Further, the cusp of the opposing maxillary molar is formed in a smooth surface such that it does not engage or lock.
That is, it is formed in a smooth surface shape. Such an occlusal surface S
2, S8 may have a groove or a concave portion within a range in which the cusp on the upper jaw side can smoothly engage without engaging or the like.
Then, as shown, these flat occlusal surfaces S
2, S8 are formed and arranged so as to be included in a virtual plane that is substantially parallel to (in this case, substantially coincides with) the occlusal plane P.

On the other hand, as shown in FIGS. 1 and 3, the lower second premolar 40 and the first molar 6
0 is provided as two separately prepared teeth.
Thus, the occlusal surface S of each of the molars 40, 60
4, S6, unlike the above-mentioned conventional molars 110, contact areas R4, R6 in which the supporting cusps 32, 52 of the upper second premolars 30 and the first molars 50 that can be brought into contact during the mastication movement.
(FIG. 3) is formed in a concave shape. 1 and 4
As shown in (1), these contact regions R4 and R6 constitute a shallow concave portion without prominence formed so that its cross section is represented by a shallow mortar-shaped curved surface. This curved surface is also formed so as to have a smooth surface such that the mating cusp of the upper jaw does not engage or lock (smooth surface).
Note that, like the occlusal surface S, a groove or a concave portion may be provided as long as the cusp on the upper jaw does not engage or lock.

The molars 40 and 60 are formed such that the bottoms of the contact areas R4 and R6 (ie, the bottoms of the occlusal surfaces S4 and S6) are substantially parallel to the occlusal plane P at the central occlusal position.・ It is arranged. The plane including the bottom is located below the plane including the occlusal surfaces S2 and S8. Furthermore, the posterior teeth 40, 60 are such that in the central occlusal position, the apexes in the contact areas R4, R6 (here, the distal side edges of the contact areas R4, R6 as shown) are substantially parallel to the occlusal plane P. Formed to be
Are located. For this reason, in the denture according to the present embodiment, the lower jaw is arranged at a position closest to the upper jaw (ie, above) in the central occlusal position. Thus, during forward movement and lateral movement of the lower jaw during chewing, which will be described later, the position of the lower jaw is located at a position farther away from the upper jaw than the central occlusal position (ie, below). In addition,
The lower second premolar 40 and the first molar 60 may be provided in one piece as a fusion tooth. When the upper second premolar and the first molar are connecting teeth, the lower second premolar 40 and the first molar 60 are preferably formed separately.

By the way, in the denture according to this embodiment, the diameters of the contact areas R4 and R6 and the shape of a pot-like curved surface (gradient or the like) constituting the surface thereof take into account the forward movement and the lateral movement of the lower jaw during mastication. It is formed. That is,
The curved surfaces in the contact areas R4 and R6 are formed by supporting cusps 32 and 52 formed on the opposing molars 30 and 50 on the upper jaw described later.
Are formed so as to be able to contact simultaneously along the mortar-shaped curved surfaces of the contact areas R4 and R6 during forward movement and lateral movement of the lower jaw during mastication. Although not particularly limited, preferably, such a curved surface shape is formed so as to satisfy the following angle conditions when an artificial tooth is manufactured using a so-called adjustable articulator (not shown). obtain. That is, (i). Sagittal incisor path angle ≧ sagittal condylar path angle, and (ii). Lateral incisor path angle> sagittal condylar path angle, thereby determining such a curved surface shape, It can be formed to embody it. Thereby, the lower jaw movement at the time of mastication, which is excellent in occlusal balance, can be suitably realized. In this case, the lateral condyle path angle = sagittal condyle path angle / 8
It is preferably +12.

On the other hand, as shown in FIG. 3, the occlusal surface S2 corresponding to the upper surface of the lower molars 20, 40, 60, 80
As in the case of natural molars, the grooves G which contribute to easily discharge the masticated material from the occlusal surface during mastication are provided in -S8. However, as is apparent from FIG. 3, the occlusal surfaces S2, S2 of the lower first premolar 20 and the second molar 80 are lower.
8 (a portion indicated by T2 and T8 in the figure) and peripheral portions thereof at which the molars (i.e., the upper first premolar 10 and the second molar 70) that are opposed to each other at the time of occlusion described below can come into contact. Has no prominent projections. That is, the portions T2 and T8 are formed (smooth surfaces) so as to have a smooth surface such that the mating cusp of the upper jaw does not engage or lock. This allows the opposing teeth to make contact with each other in a well-balanced and stable manner during occlusion. This is because a part of the cusp of the mating tooth does not fit or get stuck in the projection or the like. For this reason, the lateral movement during chewing described later can be performed smoothly. Note that also at the contact portions T2 and T8,
A concave portion or a groove portion may be formed to such an extent that the maxillary molars mating with each other during engagement do not engage or lock.

Next, the upper molars 10, 30, 50, 70
Will be described. These upper molars, respectively,
It corresponds to (matches) each of the above-mentioned lower molars 20, 40, 60, 80. As shown in FIGS. 1 and 4, each of the upper molars 10, 30, 50, 70 has a supporting cusp 12, 3, respectively.
2, 52 and 72 are formed one by one. That is,
As shown in FIG. 4, each of the molars 10, 30, 50, and 70 has one supporting cusp formed on the lingual side. Support cusps 52 for the upper first molar 50 and the second molar 70,
Numerals 72 are formed on the mesial side, respectively (FIG. 1). Although the buccal cusps are formed in all the molars 10, 30, 50, and 70, they are formed in such a manner that they do not substantially come into contact with each other. Thus, these support cusps 12,
The top of each of 32, 52, 72, ie, the supporting cusp 1
These molars are arranged in the upper jaw such that the line connecting 2a, 32a, 52a, 72a is substantially straight when viewed from the occlusal surface. In addition, these support cusps 12a, 3
2a, 52a, and 72a are formed in the shape of a hump consisting of a smooth curved surface that is not angular and is not sharp like the tip of a crushed wood. That is, it is formed in a substantially spherical shape. On the other hand, other supporting cusps and guiding cusps are not formed in any of the upper molars 10, 30, 50, 70 according to the present embodiment.
Therefore, unlike the above-mentioned conventional artificial molars 100 and 110, at the time of occlusion (at the time of mastication), the supporting cusps 12, 32, 5
2 and 72 are the mating surfaces of the opposing lower molars S2 and S
4, S6, and S8, the food and the like are chewed and crushed.

The supporting cusp 1 of the upper molars 10 and 70
2a and 72a are arranged at substantially the same height position,
Also, the supporting cusps 32a, 52a of the upper molars 30, 50
Are also at the same height, and the supporting cusps 12a, 72
It is arranged at a position lower than a. That is, the plane including the support cusps 12a and 72a and the support cusps 3
The plane containing 2a and 52a is parallel and
The latter plane is located in the lower position.

As shown in FIGS. 1 and 4, the supporting cusps 3 of the upper second premolars 30 and the first molars 50 are provided.
2, 52 (that is, the supporting cusps 32a, 52a) are associated (matched) with each other at the central occlusal position.
0 and the first molar teeth 60 are formed so as to just contact the bottoms of the contact areas R4, R6 in the occlusal surfaces S4, S6. Further, at this time, the supporting cusps 32a, 52a
Are formed so as to be substantially parallel to the occlusal plane P, and are arranged at predetermined intraoral positions. On the other hand, as shown in FIGS. 1 and 4, in the central occlusal position, the supporting cusps 12, 72 of the upper first premolar 10 and the second molar 70 correspond to (match) the corresponding lower first premolar 20. And the second molar 80
Contact portion T of the occlusal surfaces S2, S8 formed at
2 and T8 so as to be slightly in contact therewith. Further, at this time, an imaginary plane (see a two-dot chain line in the figure) including the supporting cusps 12a and 72a is formed so as to be substantially parallel to the occlusal plane P, and is arranged at a predetermined position in the oral cavity. . Thus, the upper molars 10, 30, 5
0, 70 supporting cusps 12, 32, 52, 72 are formed on both the left buccal side (not shown) and the right buccal side (not shown).

Next, the occlusal state obtained by the denture of the present embodiment thus formed will be described. First,
In the central occlusal position, the occlusal surfaces of the lower molars 20, 40, 60, and 80 that engage with the support cusps 12a, 32a, 52a, and 72a on the upper side of the bump-shaped curved surface (that is, the contact portions T2, T8, A contact state of a total of eight points with a stable one-to-one tooth with the contact areas R4, R6) can be maintained.

Further, the bottom surface of the contact area R4 in the occlusal surface S4 of the lower second premolar 40, which is substantially parallel to the occlusal plane P, and the bottom surface of the contact area R6 in the occlusal surface S6 of the first molar 60 As a result, the supporting cusps 32 of the upper second premolars 30 and the supporting cusps 52 of the first molars 50, which are also substantially parallel to the occlusal plane P, come into contact with each other, so that the two pairs of molars (the second premolars 30, 40 and first molars 50, 60)
Occlusal balance can be obtained. That is,
An anti-bite contact structure is formed at a total of four points on the left and right. The occlusal force (pressure) in this state is balanced between right and left in a direction substantially perpendicular to the occlusal plane P while the two pairs of molars 30, 4
This is because they are equally added to 0, 50, and 60. At this time,
As described above, the remaining two pairs of molars (first premolars 10, 20 and second molars 70, 80) are in contact with the contact portion T.
2, only the contact is made at T8, and there is no risk of disturbing the occlusal balance.

Next, the movement of the denture according to the present embodiment during forward movement and side movement during mastication will be described. First, the movement at the time of the forward exercise will be described. At the time of the mandibular forward movement shown in FIG. 2 during mastication, the supporting cusps 32, 52 of the maxillary second premolar 30 and the first molar 50 (cusp 32a,
52a) simultaneously contacts the tops (corresponding to distal end edges) of the occlusal contact areas R4 and R6 of the lower second premolars 40 and the first molars 60 that are opposed to each other. That is, as is clear from FIGS. 1 and 2, as a result of the formation of the curved surfaces of the contact regions R4 and R6 as described above, the two support cusps 32 and 52 (cusps 32a and 52a)
At the time of the lower jaw forward movement, it is possible to simultaneously contact the contact areas R4 and R6 while maintaining the parallel state with the occlusal plane P. On the other hand, the supporting cusps 12, 72 of the maxillary first premolars 10 and the second molars 70 (cusps 12a, 72a)
Are the corresponding lower first and second molars 20 and 80
Does not come into contact with the flat occlusal surfaces S2 and S8. That is, as is apparent from FIG. 2, the two support bites are formed during the forward movement in which the position of the lower jaw is relatively lower than the central bite position as a result of the formation of the curved surfaces of the contact areas R4 and R6 as described above. The crowns 12a, 72a can no longer make contact with the contact portions T2, T8 (i.e., the contact portions T2, T8 contact the countermolar supporting cusp only in the central occlusal position).

The movement between the molars described above enables the balance of the occlusal force to be maintained even during such forward movement. That is, the first premolars 10 and 2 of the upper and lower jaws
0 and the second molars 70, 80 do not contact each other. As a result, the occlusal force is reduced to the second premolars 30 and the first molars 50 on the upper jaw and the second premolars 4 on the lower jaw contacting the upper jaws.
0 and / or the first molar 60.
In the present embodiment, the upper and lower jaw second premolars 30 and 40 and the upper and lower jaw first molars 50 and 60 vertically and one-to-one. At this time, as described above, the supporting cusps 32, 5 of the upper second premolars 30 and the first molars 50 are used.
2 is substantially parallel to the occlusal plane P and simultaneously contacts the corresponding contact areas R4, R6. As a result, an occlusal force (pressure) is uniformly applied to these molars in a direction substantially perpendicular to the occlusal plane P, so that the occlusal balance can be maintained.

Next, the movement during the lateral movement will be described. At the time of mastication, during the lower jaw lateral movement shown in FIGS. 5 and 6,
Supporting cusp 3 of the upper second premolar 30 and the first premolar 50
2 and 52 (cusps 32a and 52a) are respectively the tops of the occlusal contact areas R4 and R6 of the opposing lower second premolars 40 and first molars 60 (the lingual edge on the working side, the balance). Side corresponds to the buccal edge.) That is, as a result of the formation of the curved surfaces of the contact areas R4 and R6 as described above, the two support cusps 32 and 52 (cusp 3
2a, 52a), during the lateral movement (from the working side to the equilibrium side) similarly to the mandibular forward movement, the contact areas R4, R6 are simultaneously contacted so as to maintain the parallel state with the occlusal plane P. can do. On the other hand, the upper first premolar 1
The supporting cusps 12, 72 (cusps 12a, 72a) of the 0 and the second molars 70 are the flat-shaped occlusal surfaces S2, S8 of the lower first premolars 20 and the second molars 80 to be matched.
Do not touch That is, as is clear from FIGS. 5 and 6A and 6D, the lower jaw position is lower than the central occlusal position even in the lateral movement due to the curved surfaces of the contact areas R4 and R6. The two support cusps 12a, 72a can no longer contact the contact portions T2, T8.

The movement between the molars described above makes it possible to maintain the balance of the occlusal force even during such lateral movement. That is, the first premolars 10 and 2 of the upper and lower jaws
Occlusion force (pressure) is applied to the second premolars 30, 40 and the first molars 50, 60 as a result of the zero and second molars 70, 80 not contacting each other. At this time, as described above, the support cusps 3 of the upper second premolars 30 and the first molars 50
2, 52 are substantially parallel to the occlusal plane P and simultaneously come into contact with the corresponding contact areas R4, R6. As a result, the occlusal force is evenly applied to these molars in a direction substantially perpendicular to the occlusal plane P, This is because occlusal balance can be maintained.

As described above, according to the denture according to the present embodiment, the occlusal balance can be maintained in the central occlusal position, and also in the forward movement and the side movement during mastication. Therefore, unbalanced occlusal contact during clenching and mastication can be removed, and as a result, a harmonious and stable occlusal can be obtained.
According to such occlusion, systemic symptoms associated with occlusal abnormality can be prevented or ameliorated.

The preferred embodiment of the denture according to the present invention has been described above. However, the denture according to the present invention may have any of the above-mentioned features that can specify the present invention.
The present invention is not limited to the illustrated embodiment. For example, in the above embodiment, the first premolars 10, 20 and the second molars 70, 80 of the upper and lower jaws are in contact at the contact portions T2, T8 in the central occlusal position. It may be in a state. With such a configuration, similarly to the above-described embodiment, the upper and lower jaw second premolars 30,
The occlusal contact in the occlusal region between the 40 and the first molars 50 and 60 in the occlusal area can maintain the overall occlusal balance.

Needless to say, the denture of the present invention is not limited to the denture according to the present embodiment. Also, in the denture of the present embodiment, for example, when the subject has a small jaw, the second molar may be omitted. Alternatively, it may be a natural tooth or a remaining tooth where the first premolar and the second molar remain. In this case, the first premolar and the second molar are brought into contact or non-contact at the central occlusal position so as not to impede the occlusal balance in the second premolar equivalent artificial tooth and the first molar equivalent artificial tooth. It is necessary to adjust as follows.

Further, in the above embodiment, the shape of the denture realizing the present invention and the shape of the artificial tooth constituting the same have been described, but various shapes are possible as long as the effects of the present invention can be maintained or improved. Internal shapes and artificial tooth materials can be used. For example, from a two-layer or three-layer structure of a resin having different properties or a metal or ceramic base (that is, a two-layer structure of a surface layer and a base layer or a three-layer structure of a surface layer, an intermediate layer, and a base layer) In the artificial posterior tooth, a boundary surface of each layer may be substantially parallel to the occlusal plane P. For example, when the portion forming the top of the occlusal surface of the lower molars (especially the second premolars and the first molars) has the above-mentioned two-layer structure or three-layer structure, the interface between the intermediate layer and the basal layer is When viewed from the cross-section in the buccolingual direction at the center occlusal position, it is preferable that the occlusal plane is formed so as to be substantially parallel to the occlusal plane P. According to this configuration, it is possible to avoid a difference in mass, hardness, density, and the like between the layers constituting the artificial teeth made of resin, metal, ceramic, or the like from affecting the balance at the time of occlusion. For this reason, a more precise occlusal balance can be maintained. In particular, such an effect can be remarkably exerted on the second premolar and the first molar on the mandibular side. In the case of such a multilayer structure, the hardness and / or abrasion resistance of the upper and lower jaw second premolars and the first molars (particularly, the lower second premolars and the first molars) are determined. It is preferable to make the occlusal balance higher than other artificial molars from the viewpoint of maintaining the occlusal balance for a long period of time.

Alternatively, the material (hardness, etc.) of each artificial molar constituting the denture of the present invention may be different for each type of molar. This is because the occlusal force (occlusal pressure) applied varies depending on the type of molar. For example, to maintain the occlusal balance appropriately, regardless of the single-layer structure or the multi-layer structure (typically the two-layer or three-layer structure), the hardness of the surface layer is determined by the upper second premolar and the upper jaw. The hardness of one molar should be equal. The lower second premolar and the lower first molar preferably have the same hardness. The hardness of the lower second premolar and the lower first molar is preferably equal to or lower than the hardness of the upper second premolar and the upper first molar. Furthermore, when the upper and lower jaw first and / or second molars are provided, the hardness of the surface layer is determined between the upper and lower first and second molars and the lower first molar. And the second molar are preferably equal. Furthermore, the hardness of the upper second premolars and the first molars should be equal to or higher than the hardness of the upper first premolars and the second molars. Similarly, the hardness of the lower second premolar and the first molar is preferably equal to or higher than the hardness of the lower first premolar and the second molar. More preferably, the upper first premolar, the second premolar, the first molar and the second molar are all of the same hardness.

Next, using the denture and the artificial tooth of the present invention,
An example in which systemic symptoms caused by occlusal abnormalities are improved will be described.

(Case 1) (Subject) 72 years old, female (symptoms) Headache, shoulder pain, stiff shoulder, knee pain, tinnitus (artificial teeth used) Upper jaw All right and left teeth (total of 14 teeth) Lower jaw Excluding right canine teeth All teeth (total of 13 teeth) Of these, artificial teeth (equivalent to a total of 16 teeth) equivalent to the first and second premolars, the second premolars, the first molars, and the second molars of the upper and lower jaws are described in the above embodiment. The artificial tooth having the form shown in FIGS. 1 to 6 described specifically was used, and the other artificial teeth used were those commonly used. The non-artificial teeth (lower right canine) were the remaining teeth of the subject.

(Production of Denture) A denture was produced using the artificial tooth. In denture production, using an articulator,
In the central occlusal position, the supporting cusp of the upper second premolar and the first molar (supporting cusp) just touches the bottom of the contact area in the occlusal surface of the lower second premolar and the first molar, The supporting cusps of one premolar and the second molar were made to slightly contact the occlusal surfaces formed on the lower first premolar and the second molar. Similarly, using the articulator, during the mandibular forward movement, the supporting cusps (supporting cusps) of the upper second premolars and the first molars respectively confront the corresponding lower second premolars and the first premolars. The upper cusps of the upper first premolars and the second molars (supporting cusps) should be in contact with the apex of the occlusal surface of the molars at the same time, and the corresponding lower first premolars and the second molars It was manufactured so as not to contact the flat-shaped occlusal surface. Similarly, using the articulator, during the lateral movement of the lower jaw, the supporting cusp (supporting cusp) of the upper second premolar and the first molar is, respectively, the corresponding lower second premolar and the first premolar. Simultaneously touches the top of the occlusal contact area of the molars (corresponding to the lingual edge on the working side and the buccal edge on the equilibrium side) and supports the maxillary first and second molars (Support cusp) was manufactured so as not to contact the flat occlusal surface of the opposing lower first and second molars.

(Occlusal Adjustment) After the above-mentioned denture is mounted, the following occlusion adjustment is performed by the dentist on the first premolar, the second premolar, the first molar, and the second molar of the upper and lower right and left jaws. It was conducted. In addition, about the anterior tooth, it implemented so that right and left side canine teeth might contact at the time of lateral motion, and right and left side central incisors at the time of forward motion. In the central occlusal position, the supporting cusp of the upper second premolar and the first molar (supporting cusp) just touches the bottom of the contact area in the occlusal surface of the lower second premolar and the first molar, The supporting cusps of one premolar and the second molar were carried out so as to make slight contact with the occlusal surface formed on the lower first premolar and the second molar. Also,
During anterior mandibular movement, the supporting cusp of the maxillary second premolar and the first molar (the supporting cusp) is the top in the contact area of the occlusal surface of the mating lower second premolar and the first molar, respectively. So that the supporting cusps of the upper first molar and the second molar do not contact the mating flat occlusal surfaces of the corresponding lower first and second molars. ,Carried out. In addition, during lateral mandibular movement, the supporting cusps of the upper second premolars and the first molars (supporting cusps) are the occlusal contact areas of the mating lower second premolars and the first molars, respectively. At the same time (corresponding to the lingual edge on the working side and the buccal edge on the equilibrium side), and the supporting cusps (cusp) of the maxillary first and second molars are opposite. The test was performed so as not to contact the flat occlusal surfaces of the lower first and second molars that are combined.

FIG. 7 shows a preferred occlusal state obtained by such occlusal adjustment. That is, in this figure, the occlusion state of the left and right upper and lower teeth during the central occlusal position, the forward movement, and the side movement is confirmed using the occlusal paper. According to this figure, in the central occlusal position, all molars are in occlusal contact, but in the first and second molars of the left and right upper and lower jaws, there are four pairs of point-like contacts. . On the other hand, in the second premolar and the first molar of the left and right upper and lower jaws, four pairs of sufficient anti-occlusal contact parts have been obtained,
The four-point support structure mainly composed of these four pairs of upper and lower molars is apparent. In addition, at the time of forward movement and side movement, sufficient anti-occlusal contact between the second premolars and the first molars of the left and right upper and lower jaws is obtained, and the first premolars and the second premolars of the left and right upper and lower jaws are obtained. It is clear that there is little contact in the second molar. That is, the four-point support structure by the left and right upper and lower jaw second premolars and the first molar during the forward motion and the lateral motion is apparent.

(Progress) The occlusal adjustment was performed once after wearing the denture, and the subjective symptom, which was the chief complaint, was remarkably improved.
The occlusal adjustment by the dentist was easily performed in a short time. Thereafter, over a period of about two months, a total of six consultations were performed to confirm the change in occlusion and improvement in subjective symptoms due to body changes, and to confirm that the subjective symptoms had not recurred, and the treatment was terminated. That is, in the course of the treatment, the subject's subjective symptoms of headache, shoulder pain, stiff shoulder, knee pain, and tinnitus improved. In particular, headache, shoulder pain, and stiff shoulders were significantly improved.

(Case 2) (Subject) 72 years old, female (symptoms) Low back pain, deafness (artificial teeth used) Upper jaw All right and left teeth (Total 14 teeth) Lower jaw All right and left teeth (Total 14 teeth) First and second premolars, second premolars, first molars, and second molars.
6) is specifically described in the above embodiment,
An artificial tooth having the form shown in FIGS. 1 to 6 was used, and the other artificial teeth used were those commonly used.
Using these artificial teeth, a denture similar to that of Case 1 was produced.

(Occlusal Adjustment) After the above-mentioned denture is mounted, the first premolar, the second premolar, the first premolar, and the second premolar of the upper and lower right and left jaws are determined by the dentist in the case 1. Similar occlusion adjustments were made. The occlusal adjustment was performed once after wearing the denture, and the subjective symptom, which was the chief complaint, was significantly improved. Also in this example, the occlusal adjustment by the dentist was easily performed in a short time. After that, over a period of about two and a half months, a total of seven consultations were performed to confirm the change in occlusion and improvement in subjective symptoms due to changes in the body and to confirm that the subjective symptoms had not recurred, and the treatment was completed. .
That is, the subject's back pain and hearing loss improved significantly.

(Case 3) (Subject) 50-year-old woman (symptoms) Headache, shoulder pain, stiff shoulder, stiff neck, eye strain (artificial teeth used) Upper jaw Remaining teeth excluding right first premolar ( Mandibular Lower jaw Right and left incisors, canines, and remaining teeth excluding second premolars (total of 10) Of these, first and second premolars, second premolars, and first large As for the artificial teeth corresponding to the molar teeth and the second molar teeth (eight upper and lower teeth, a total of 16 teeth), the artificial teeth having the forms shown in FIGS. Normally used artificial teeth were used. The non-artificial teeth (total 5 teeth) were the remaining teeth of the subject. Using these artificial teeth, a denture similar to that of Case 1 was produced.

(Occlusal Adjustment) After installing the above-mentioned denture, the dentist performs the first premolar, the second premolar, the first premolar, and the second premolar (artificial tooth and remaining tooth) of the left and right upper and lower jaws. As a result, the same occlusal adjustment as in Case 1 was performed.
The occlusal adjustment was performed once after wearing the denture, and the subjective symptom, which was the chief complaint, was significantly improved. Also in this example, the occlusal adjustment by the dentist was easily performed in a short time. Thereafter, over a month and a half, a total of four consultations were performed to confirm the change in occlusion and improvement of subjective symptoms due to body changes and to confirm that the subjective symptoms had not recurred, and the treatment was completed. . In other words, headache, shoulder pain,
Stiff shoulders, stiff necks, and eye strain were significantly improved.

(Case 4) (Subject) 73-year-old man (symptoms) Headache, jaw pain, stiff shoulder, stiff neck, back pain, back pain (artificial teeth used) Upper jaw Remaining teeth excluding the right second premolar (Total of 13 teeth) Mandibular left and right total teeth (total of 14 teeth) Of these, first and second premolars, second premolars, first molars, and second molars (eight upper and lower teeth, total of eight teeth) For the artificial tooth corresponding to (16 teeth), the artificial tooth having the form shown in FIGS. 1 to 6 specifically described in the above embodiment is used, and for the other artificial teeth, those commonly used are used. Using. The non-artificial teeth (one) were the remaining teeth of the subject. Using these artificial teeth, a denture similar to that of Case 1 was produced.

(Occlusal Adjustment) After installing the above-mentioned denture, the dentist performs the first premolar, the second premolar, the first premolar, and the second premolar (artificial tooth and remaining tooth) of the left and right upper and lower jaws. As a result, occlusal adjustment similar to that of Case 1 was performed. The occlusal adjustment was performed only once after wearing the denture, and the subjective symptom, which was the chief complaint, was significantly improved. Also in this example, the occlusal adjustment by the dentist was easily performed in a short time. Thereafter, over a period of about 10 days, a total of two consultations were performed to confirm the change in occlusion and improvement in subjective symptoms due to body changes and to confirm that the subjective symptoms had not recurred, and the treatment was terminated. That is, the subject's subjective symptoms such as headache, stiff shoulders, stiff neck, back pain, and back pain improved. In particular, the subjective symptoms of stiff shoulders, back pain, and back pain improved significantly.

(Case 5) (Subject) 53 years old, female (symptoms) Headache, jaw pain, shoulder pain, stiff shoulder, back pain, back pain, eye strain (artificial teeth used) Maxilla Right middle incisor, Left Remaining teeth excluding 2 premolars and 1st molars (11 total) Lower jaw Remaining teeth excluding right central incisors, lateral incisors and canines, and left first molars (11 total) The artificial teeth corresponding to the first and second premolars, the second premolars, the first molars, and the second molars (eight upper and lower teeth, a total of 16 teeth) are specifically described in the above embodiment. The artificial teeth having the forms shown in FIGS. 1 to 6 described above were used, and the other artificial teeth used were those commonly used. The non-artificial teeth (total 6 teeth) were the remaining teeth of the subject. Using these artificial teeth, a denture similar to that of Case 1 was produced.

(Occlusal Adjustment) After mounting the above-mentioned denture, the dentist performs the first premolar, the second premolar, the first molar, and the second molar (denture and remaining tooth) of the left and right upper and lower jaws. The same occlusal adjustment as in case 1 was performed. The occlusal adjustment was performed once after wearing the denture, and the subjective symptom, which was the chief complaint, was significantly improved. Occlusion adjustment by the dentist was performed quickly and easily. Thereafter, for about one month, a total of two consultations were conducted to confirm the change in occlusion and improvement of subjective symptoms due to body changes and to confirm that the subjective symptoms did not recur, and the treatment was terminated. That is, the subject's headache, jaw pain, shoulder pain, stiff shoulder, back pain, back pain, and eyestrain improved. In particular, headache, chin pain, shoulder pain, stiff shoulders and back pain improved significantly.

From the above cases, the artificial tooth according to the present invention is effective for performing treatment mainly on the balance of occlusal force regardless of whether the subject is a complete denture or a partial denture. That was confirmed. That is, according to the present invention, it was possible to provide a denture excellent in occlusal balance at the time of mastication from the viewpoint of prevention of systemic symptoms that may be caused by occlusal abnormality and improvement of systemic symptoms caused by occlusal abnormality. That is, according to the present invention, it is clear that the occlusal force can be balanced by improving the occlusal center of gravity abnormality, the cusp interference, and the lower jaw movement limitation, which are said to be the causes of the occlusal abnormality.

[0070]

According to the present invention, occlusal balance can be easily provided.

[Brief description of the drawings]

FIG. 1 is a schematic diagram showing a state of a central occlusal position of a left buccal artificial molar constituting a denture of the present invention according to one embodiment, as a cross-section of a straight line connecting a support cusp of a maxillary molar. .

FIG. 2 is a schematic diagram showing a constant state of the left buccal artificial molar constituting the denture of the present invention according to one embodiment at the time of forward movement, in a cross-section taken along a straight line connecting the support cusp of the maxillary molar. It is.

FIG. 3 is an arrangement plan view schematically showing the state of the occlusal surface of each artificial left molar on the left lower jaw side of the denture of the present invention according to one embodiment.

FIG. 4 is a cross-sectional view in the buccolingual direction schematically showing the occlusal state of each opposing tooth in FIG. 1, wherein (a), (b), (c) and (d) are the upper and lower jaws, respectively. The occlusal state of one premolar, a second premolar, a first molar and a second molar is shown.

FIG. 5 shows a side movement (operation side) of each opposing tooth in FIG.
FIG. 3 is a cross-sectional view in the buccolingual direction schematically showing the occlusal state in (a), (b), (c), and (d), respectively.
The occlusal state of the upper and lower jaw of the first premolar, the second premolar, the first molar and the second molar is shown.

FIG. 6 shows a side movement (equilibrium side) of each opposing tooth in FIG.
FIG. 3 is a cross-sectional view in the buccolingual direction schematically showing the occlusal state in (a), (b), (c), and (d), respectively.
The occlusal state of the upper and lower jaw of the first premolar, the second premolar, the first molar and the second molar is shown.

FIG. 7 is a diagram showing an example of a preferable occlusion state in the present invention.

FIG. 8 is a cross-sectional view schematically showing a central occlusal position in a conventional artificial molar.

FIG. 9 is a cross-sectional view schematically showing one state of a conventional artificial molar during mastication.

[Explanation of symbols]

10, 20 First premolar artificial tooth 30, 40 Second premolar equivalent artificial tooth 50, 60 First molar equivalent artificial tooth 70, 80 Second molar equivalent artificial tooth 12, 32, 52, 72 Support cusp 12a , 32a, 52a, 72a cusp top G groove P occlusal plane R4, R6 contact area S1, S2, S3, S4, S5, S6, S7, S8 occlusal plane T2, T8 contact part

 ──────────────────────────────────────────────────の Continued on the front page (72) Inventor Hideyasu Tamagawa 36, Chodacho, Meito-ku, Nagoya City, Aichi Prefecture

Claims (20)

[Claims] 1. A denture having artificial teeth corresponding to at least one of a second premolar and a first molar of the upper and lower jaws, wherein the artificial teeth provided are the first and second jaws other than the artificial teeth. In relation to the second premolar and the first molar, the virtual plane including the following features; the supporting cusp of the upper second premolar and the supporting cusp of the upper first molar is approximately the occlusal plane. Parallel; the imaginary plane containing the bottom at the opposing tooth contact area formed on the occlusal surface of the lower second premolar and lower first molar is approximately parallel to the occlusal plane; and central occlusal position In the above, the supporting cusp of the upper second premolar and the supporting cusp of the upper first molar are formed on the occlusal surface of the lower second premolar and the lower first molar, respectively. A denture, which is formed to have a bottom contact; 2. An imaginary plane including an apex in an opposing tooth contact area formed on an occlusal surface of the lower second premolar and the lower first molar is substantially the following with respect to the occlusal plane. 2. is formed to have parallel;
The denture described. The supporting cusp of the upper second premolar and the supporting cusp of the upper first molar are occlusal of an artificial tooth equivalent to a lower second premolar and an artificial tooth equivalent to a lower first molar. 3. The denture according to claim 1, wherein the dentures can be simultaneously contacted with respective corresponding opposing teeth contact areas formed on the surface. 4. 4. The denture according to claim 1, further comprising an artificial tooth corresponding to at least one of the lower second premolar and the lower first molar, wherein the artificial tooth is formed on an occlusal surface of the artificial tooth. The shape of the contact area of the opposing teeth is as follows: (a) sagittal incisor path angle ≧ sagittal condylar path angle;
And (b) a lateral incisor tract angle> a sagittal condylar tract angle; 5. The denture according to claim 1, which is provided as an artificial tooth corresponding to at least one of a lower second premolar and a lower first molar, wherein the artificial tooth is formed on an occlusal surface of the artificial tooth. The denture contact area is smooth, denture. 6. An artificial tooth corresponding to at least one of the first and second molars of the upper and lower jaws.
The dental prosthesis according to any of the preceding claims, wherein the occlusal surface of the provided lower artificial tooth is substantially parallel to the occlusal plane; and / or comprises the supporting cusp of the provided upper artificial tooth. The virtual plane that is formed is substantially parallel to the occlusal plane; 7. A denture provided with artificial teeth corresponding to at least each of a second premolar and a first molar of the upper and lower jaws,
The second premolar and the first molar of the upper jaw have the same hardness,
The second premolar and the first molar of the lower jaw have the same hardness, and the lower second premolar and the first molar are the same as or higher than the hardness of the upper second premolar and the first molar. The denture according to any one of claims 1 to 6, wherein the denture also has a low hardness. 8. An artificial tooth corresponding to each of a first premolar and a second molar of the upper and lower jaws, wherein the second premolar and the first molar of the upper jaw are the first premolar and the second molar of the upper jaw. The hardness of the molars is equal to or higher than that of the molars, and the lower second premolars and the first molars are equal to or higher than the hardness of the lower first molars and the second molars The denture according to claim 7, comprising: 9. A denture having artificial teeth corresponding to the second premolar and the first molar of the lower jaw, wherein the denture is formed on the occlusal surface of the lower second premolar and the lower first molar. The imaginary plane containing the bottom in the opposing contact area is substantially parallel to the occlusal plane; and the occlusal plane formed in the occlusal surface of the lower second premolar and the lower first molar. A denture, which is formed to have an imaginary plane containing the apex substantially parallel to the occlusal plane; 10. A denture provided with artificial teeth corresponding to at least one of a lower second premolar and a lower first molar, wherein an artificial tooth contact area formed on an occlusal surface of the artificial tooth is provided. The shape has the following angle conditions: (a) sagittal incisor path angle ≧ sagittal condylar path angle;
And (b) a lateral incisor tract angle> a sagittal condylar tract angle; 11. A denture provided with artificial teeth corresponding to at least one of a lower second premolar and a lower first molar, wherein an opposing contact area formed on an occlusal surface of the artificial tooth is smooth. Planar dentures. 12. One of the first premolar and the second molar of the lower jaw
An artificial tooth having an artificial tooth equivalent to or above a tooth, wherein an occlusal surface of the artificial tooth is substantially parallel to an occlusal plane. 13. A denture provided with artificial teeth corresponding to a first premolar, a second premolar, a first molar, and a second molar, respectively, of the lower jaw, wherein the first premolar and the second molar are provided. Each bottom of each occlusal surface of
The bottom of each occlusal surface of the second premolar and the first molar is substantially parallel to the occlusal plane,
Substantially parallel to the occlusal plane, and located below the bottom of each occlusal surface of the first premolar and the second molar,
Denture. 14. A denture provided with artificial teeth corresponding to a first premolar, a second premolar, a first molar, and a second molar, respectively, of the upper jaw, wherein, in a central occlusal position, the first premolar and Each supporting cusp of the second molar is arranged at the same height, and each supporting cusp of the second premolar and the first molar is positioned from the position of each supporting cusp of the first premolar and the second molar. A denture, which is also formed to be positioned below and at the same height. 15. A line connecting the support cusps of the first premolar and the second molar and a line connecting the support cusps of the second premolar and the first molar are respectively formed in an occlusal plane. 15. The denture of claim 14, wherein the denture is substantially parallel. 16. An artificial tooth corresponding to a lower second premolar or lower first molar, wherein the shape of the opposing contact area formed on the occlusal surface of the artificial tooth is as follows: a) sagittal incisor tract angle ≥ sagittal condylar tract angle;
And (b) a lateral incisor tract angle> a sagittal condylar tract angle; 17. An artificial tooth corresponding to a lower second premolar or lower first molar, wherein the opposing contact area formed on the occlusal surface of the artificial tooth is smooth. 18. An artificial tooth corresponding to a lower second premolar and a lower first molar, wherein the shape of the opposing tooth contact area formed on the occlusal surface of each artificial tooth is:
The following angle conditions: (a) sagittal incisor tract angle ≥ sagittal condylar tract angle; and
(b) Artificial teeth with and connected lateral incisor tract angle> sagittal condylar tract angle. 19. An artificial tooth set comprising artificial teeth corresponding to a first premolar, a second premolar, a first molar, and a second molar of a lower jaw, wherein the set of the second premolar and the lower jaw are provided. The shape of the opposing contact area formed on each occlusal surface of one molar is as follows: (a) sagittal incisor path angle ≥ sagittal condylar path angle; and (b) lateral incisor path Angle> sagittal condylar angle; the shape of the opposing contact area formed on each occlusal surface of the first premolar and the second molar is as follows: (a) sagittal cutting Or an artificial tooth having a tooth path angle ≧ sagittal condylar path angle; and (b) a lateral incisor path angle> sagittal condylar path angle; or a shape that is gentler than a shape satisfying this angle condition. Set. 20. An artificial tooth corresponding to an upper second premolar and an upper first molar, having only a lingual cusp as a mating contact portion of each artificial tooth, wherein the lingual cusp is substantially spherical. And artificial teeth that are connected.