JP2011024904A - Treatment denture - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a treatment denture capable of reducing difficulty and a frequency of adjustment and the burden of a patient and an operator, having high treatment effect of correcting a temporomandibular joint. <P>SOLUTION: Artificial posterior teeth 34, 35, 36, and 37 are composed of maxillary posterior teeth 2 of the treatment denture 1 and they are ceramic teeth. Meanwhile, mandibular artificial teeth 4 are composed of molar artificial teeth including a ceramic artificial tooth 54 corresponding to the first premolar, and acrylic resin artificial teeth (cut teeth) 55, 56, and 57 corresponding to the second premolar and the back teeth. A patient wears the treatment denture 1 and chews repeatedly, then the artificial teeth 55, 56 and 57 with relatively lower hardness are selectively and automatically worn. As a result of that, a mandibular condyle 91 is guided to the top part 81a of the mandibular fossa 81. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a denture, and more particularly, to a treatment denture that is attached to a patient prior to making a final denture.

  Instead of the so-called one-time method of suddenly creating a normal denture for the long-term use, that is, the final denture, a method has been proposed in which a treatment denture is first created before the final denture is created and then attached to the patient. .

  In other words, prior to the creation of the final denture, a treatment denture is first created, and various adjustments are made while having the patient use the treatment denture, creating a more functional form for both patients and practitioners. When the condition is satisfactory, the treatment denture is replaced with the final denture.

  In this way, by using a treatment denture, even if a normal jaw position cannot be derived by normal occlusal acquisition, such as a patient who has been wearing a denture that is not compatible for many years, treatment can be performed. It is possible to obtain dentures with a more functional form by sequentially adjusting the artificial dentures (see the column “Prior Art” Nos. “0002” to “0008” of Patent Document 1).

  However, the conventional method using a dental prosthesis has the following problems. For example, in the case of a patient whose jaw joint at the time of occlusion is not in the optimal position (the state where the mandibular head is located at the uppermost part of the mandibular fossa) due to reasons such as wearing a denture that is not compatible for many years as described above. Based on the jaw position obtained by occlusal acquisition at that time, occlusion is determined and upper and lower treatment dentures are created.

  When the patient is chewing food using the treatment denture, the jaw joint gradually approaches the optimal position due to the action of the masseter muscle, etc., but as the jaw joint approaches the optimal position, The partial occlusion (mainly interference of upper and lower molar artificial teeth) occurs in the occlusion determined based on the initially obtained jaw position.

  If this defect is left unattended, the partial compression of the gums will cause pain during chewing, or the denture will come off the gums, making it impossible to chew any more food. If it becomes impossible to chew food, the temporomandibular joint that has been approaching the optimal position will not be improved any more, or in the worst case, it may be restored.

  Therefore, in order to guide the temporomandibular joint to the optimal position using the treatment denture, it is necessary to make adjustments such as cutting the interference portion of the artificial tooth every time a problem occurs.

  However, this adjustment work needs to be performed by specifying each of the interference parts (parts to be cut) and the degree of interference (depth to be cut) in a plurality of places. It is a difficult task.

  In addition, in the case of a patient whose temporomandibular joint is not in the optimal position, it is often necessary to take 4 to 6 months for the temporomandibular joint to be in the optimal position even if the treatment denture is used. During this time, once every two to three days, depending on the situation, adjustment work such as shaving artificial teeth is required as in everyday situations. That is, it is necessary to perform adjustment work frequently.

  That is, the conventional method of using a dental prosthesis has a problem that the burden on the patient and the practitioner is extremely large, particularly in order to effectively perform orthodontic treatment (or rehabilitation) of the temporomandibular joint.

Japanese Patent Laid-Open No. 10-287522

  The present invention solves such problems in the prior art, reduces the difficulty and frequency of adjustment work, reduces the burden on the patient and the practitioner, and provides a treatment denture having a high orthodontic treatment effect on the temporomandibular joint. For the purpose.

  The treatment denture according to the present invention is a treatment denture to be attached to a patient prior to the creation of the final denture, and includes an upper denture and / or a lower denture in which an artificial tooth is implanted on a denture base, and the upper denture Or artificial teeth that constitute either artificial teeth for lower jaw, and the amount of wear associated with mastication is matched to artificial teeth that may cause interference with the counter teeth when the temporomandibular joint approaches the optimal position It is characterized in that it is a cut tooth that is an artificial tooth set to be larger than the tooth, and that the temporomandibular joint is guided to an optimal position by wearing the cut tooth with chewing action. .

  The features of the present invention can be broadly shown as described above, but the configuration and contents thereof, together with the objects and features, will be further clarified by the following disclosure in view of the drawings.

  The treatment denture according to the first invention of the present application is a treatment denture to be attached to a patient prior to the creation of the final denture, and includes an upper denture and / or a lower denture in which an artificial tooth is implanted in the denture base, Amount of wear associated with mastication of artificial teeth that constitute either maxillary dentures or mandibular dentures that may cause interference with the opposing teeth when the temporomandibular joint approaches the optimal position Is configured to guide the temporomandibular joint to the optimum position by wearing the tooth to be abraded with chewing action, and an artificial tooth set so as to be larger than the counter tooth. Features.

  For patients whose temporomandibular joint is not in the optimal position, if the patient is chewing food using a treatment denture, the temporomandibular joint gradually approaches the optimal position due to the action of the masseter muscle, etc. A defect occurs in the occlusion determined based on the jaw position obtained first. That is, interference occurs between some of the paired teeth. In order to bring the temporomandibular joint closer to the optimum position, it is necessary to remove this interference and continue the orthodontic treatment of the temporomandibular joint.

  Therefore, by setting one of these counter teeth as the tooth to be cut and setting the amount of wear associated with the mastication action to be larger than that of the counter tooth, the tooth to be cut is automatically generated along with the mastication action. And can be selectively worn to guide the temporomandibular joint to the optimum position.

  That is, if this treatment denture is used, the adjustment work is automated to some extent, thereby reducing the difficulty and frequency of the adjustment work of the denture by the practitioner, and reducing the burden on the patient and the practitioner. As a result, the orthodontic treatment effect of the temporomandibular joint can be enhanced without requiring a high degree of skill.

  The treatment denture according to the second invention of the present application is configured such that in the treatment denture according to the first invention of the present application, the hardness of the contact portion of the work tooth with the counter tooth is lower than that of the counter tooth. It is characterized by this.

  By configuring so that the hardness of the contact portion of the work tooth with the counter tooth is lower than that of the counter tooth, the amount of wear accompanying the chewing action of the work tooth can easily be applied to the counter tooth. It can set so that it may become large compared with.

  The treatment denture according to the third invention of the present application is the treatment denture according to the second invention of the present application, wherein the work tooth has a contact portion made of a synthetic resin with a counter tooth, It is an artificial tooth provided with a blade.

  Therefore, a synthetic resin that comes into contact with the blade by biting a synthetic resin portion of the tooth to be cut and a blade having a relatively high hardness and a small contact area with the cutting tooth (and thus a high contact pressure). The part can be worn more quickly. In addition, the degree of freedom to select the blade hardness, contact area with the counter teeth, shape, surface roughness, etc. is high, so the grinding ability of the grinding teeth is appropriate according to the patient's jaw symptoms and occlusal force Easy to set.

  The treatment denture according to the fourth invention of the present application is the treatment denture according to the third invention of the present application, wherein the artificial tooth provided with the blade is configured such that the blade can be replaced during orthodontic treatment of the temporomandibular joint. And

  Therefore, the blade can be appropriately replaced according to the progress of orthodontic treatment of the temporomandibular joint. For this reason, it is possible to appropriately select a grinding tooth having an optimum grinding ability while observing the progress of orthodontic treatment of the temporomandibular joint. That is, based on changes in the symptoms of the patient's jaw, changes in the occlusal force, etc., the temporomandibular joint correction treatment suitable for the patient can be performed more finely.

  The treatment denture according to the fifth invention of the present application is characterized in that in the treatment denture according to any of the first to fourth inventions of the present application, the work tooth is an artificial tooth deeper than the second premolar. To do.

  The patient continues to use the treatment denture, and the orthodontic treatment effect of repeated chewing movement moves the temporomandibular joint from the non-optimal position to the optimal position (in other words, the mandibular mandibular head is lateral) When moving to the uppermost part of the mandibular fossa of the skull), among the artificial teeth of the molar portion, there is a tendency that a larger defect (larger interference) occurs in the artificial tooth located deeper.

  Therefore, in order to promptly guide the mandibular head to the uppermost part of the mandibular fossa, the first premolar is not worn out, and this is regarded as a fulcrum (fixed point) for the movement of the mandible by orthodontic treatment. It is reasonable to actively wear only artificial teeth beyond the molars.

  That is, it becomes possible to more efficiently perform orthodontic treatment of the temporomandibular joint by actively wearing only the artificial teeth behind the second premolars.

FIG. 1A is a plan view of an upper denture 2 that constitutes a treatment denture 1. FIG. 1B is a plan view of the lower denture 4 that constitutes the treatment denture 1. FIG. 2 is a side view conceptually showing an initial occlusal state in which the treatment denture 1 is attached to a patient. FIG. 3 is a side view conceptually showing an occlusal state when a predetermined period has elapsed after the treatment denture 1 is mounted. FIG. 4 is an enlarged view of a portion of the treatment denture 1 in FIG. FIG. 5 is a side view conceptually showing a state in which the final denture 7 is attached to the patient instead of the treatment denture 1. FIG. 6A is a plan view of the maxillary denture 102 constituting the treatment denture 101. FIG. 6B is a plan view of the lower denture 104 that constitutes the treatment denture 101. FIG. 7A is a plan view of the maxillary denture 202 that constitutes the treatment denture 201. FIG. 7B is a plan view of the lower jaw denture 204 constituting the treatment denture 201. FIG. 8A is a plan view of an upper denture 302 that constitutes the treatment denture 301. FIG. 8B is a plan view of a lower denture 304 constituting the treatment denture 301. FIG. 9A is a plan view of the maxillary denture 402 constituting the treatment denture 401. FIG. 9B is a plan view of a lower denture 404 constituting the treatment denture 401. FIG. 10 is a drawing conceptually showing an XX section of an artificial tooth 436 corresponding to the first molar tooth of the maxillary denture 402 shown in FIG. 9A. FIG. 11 is a drawing conceptually showing a cross section of an appropriate part of an artificial tooth 536 corresponding to the first molar of the maxillary denture that constitutes the treatment denture 501. FIG. 12 is a plan view of a lower denture 604 constituting a treatment denture 601 according to the seventh embodiment of the present invention.

  Taking a case of a complete denture as an example, a treatment denture 1 according to a first embodiment of the present invention will be described.

  FIG. 1A is a plan view of an upper denture 2 that constitutes a treatment denture 1. FIG. 1B is a plan view of the lower denture 4 that constitutes the treatment denture 1.

  FIG. 2 is a side view conceptually showing an initial occlusal state in which the treatment denture 1 is attached to a patient. For the purpose of illustration, the masseter muscle and the joint disc between the mandibular head 91 and the mandibular fossa 81 are shown. These are drawings in which the treatment denture 1, the temporal bone 8 and the mandible 9 are extracted.

  As shown in FIG. 1A, FIG. 1B, and FIG. 2, the treatment denture 1 is a denture that is attached to the patient prior to the preparation of the final denture 7 (see FIG. 5), and the upper denture 2 and the lower denture 4 is provided.

  The maxillary denture 2 has a structure in which a large number of artificial teeth 3 are arranged on a denture base 21 like a general denture. The lower denture 4 has a structure in which a large number of artificial teeth 5 are arranged on a denture base 41, as in a general denture. The configurations of the denture bases 21 and 41 are not particularly limited. For example, the denture bases 21 and 41 may be composed only of a floor resin such as an acrylic resin that is a general denture base material, or a denture that uses an acrylic resin and a soft resin in combination. A floor or a so-called metal floor can be used.

  All the molar prosthetic teeth 34, 35, 36, and 37 constituting the upper denture 2 are porcelain teeth.

  On the other hand, among the molar prosthetic teeth constituting the lower denture 4, the artificial tooth 54 corresponding to the first premolar is a porcelain having the same degree of hardness as the artificial tooth 3 of the upper denture 2 to be mated. .

  The artificial teeth 55, 56, and 57 corresponding to the back of the second premolar teeth among the molar artificial teeth constituting the lower denture 4 are relatively to the artificial teeth 3 of the corresponding upper denture 2. Acrylic resin teeth with low hardness are used.

  That is, in this embodiment, the artificial teeth 55, 56, and 57 having relatively low hardness between the mating artificial teeth correspond to the cut teeth. In addition, the tooth | gear which opposes a cut tooth is called a grinding tooth. In this example, the artificial teeth 35, 36, and 37 of the upper denture 2 that are opposed to the artificial teeth 55, 56, and 57 that are the work teeth correspond to the grinding teeth.

  In addition, the amount of abrasion of the work tooth per unit time associated with the mastication action is the hardness difference / contact area with the grinding tooth, the shape / surface roughness of the contact portion of the grinding tooth, the mastication force (biting force), the mastication frequency, It is influenced by the sliding distance between the paired teeth at the time of mastication, food to be masticated, etc., and it is not always easy to make a quantitative evaluation, but experience shows that it depends largely on the hardness difference. That is, if the other conditions are the same, it is considered that the greater the difference in hardness from the grinding teeth, the greater the wear amount of the work teeth. Therefore, the hardness difference from the grinding teeth can be used as an index of the amount of wear of the work teeth per unit time associated with the chewing action.

  As described above, in this embodiment, the case where porcelain teeth are used as grinding teeth and acrylic resin teeth are used as work teeth is described as an example. However, the present invention is limited to this. is not.

  As anatomical artificial teeth, for example, resin teeth such as polysulfone resin teeth, polycarbonate resin teeth, hard resin teeth (20 to 47 Hv), acrylic resin teeth (18 to 20 Hv) in addition to porcelain teeth (460 to 500 Hv) are used. However, among these, those having relatively high hardness can be used as grinding teeth, and those having relatively low hardness can be used as work teeth.

  Of course, the greater the difference in hardness between the pair of teeth, the greater the amount of wear. Therefore, if it is necessary to shorten the orthodontic treatment period of the temporomandibular joint, as a combination of grinding teeth and work teeth, as in the above example In addition, it is preferable to combine porcelain teeth and acrylic resin teeth having a large difference in hardness.

  Further, as the tooth to be cut, an artificial tooth made of a synthetic resin having a lower hardness than the above-mentioned acrylic resin tooth (preferably 10 to 17 Hv, more preferably 10 to 15 Hv, still more preferably 10 to 14 Hv, and even more preferably 12. 5 to 13.5 Hv (hereinafter referred to as “low-polymerized resin teeth” for convenience). The structure and manufacturing method of such a low-polymerization resin tooth are not particularly limited, but can be obtained, for example, by controlling the degree of polymerization in a structure having the same main component as that of the acrylic resin tooth.

  As described above, the tooth to be cut is not particularly limited. For example, a low polymerization resin tooth or a resin tooth can be used, preferably a low polymerization resin tooth or an acrylic resin tooth, more preferably a low polymerization tooth. Resin teeth, more preferably low polymerization resin teeth with a hardness of about 10 to 15 Hv, even more preferably low polymerization resin teeth with a hardness of about 10 to 14 Hv, most preferably a low polymerization with a hardness of about 12.5 to 13.5 Hv Resin teeth.

  From the viewpoint of hardness (Vickers hardness), this can be expressed as follows. That is, the hardness of the artificial tooth that can be used as the cutting tooth is not particularly limited, but is, for example, about 10 to 47 Hv, preferably about 10 to 20 Hv, more preferably about 10 to 17 Hv, and still more preferably. About 10 to 15 Hv, even more preferably about 10 to 14 Hv, and most preferably about 12.5 to 13.5 Hv.

  On the other hand, the grinding teeth are not particularly limited. For example, the above-mentioned porcelain teeth and various blade artificial teeth described later can be used, and preferably the porcelain teeth, or diamond particles or silicon carbide particles are fixed. Blade, ceramic blade or blade artificial tooth having a metal blade having a hardness of about 100 Hv or more, more preferably porcelain, a blade having diamond particles or silicon carbide particles fixed thereto, a ceramic blade or a hardness of about 200 Hv or more A blade artificial tooth having a metal blade, more preferably a porcelain tooth, a blade having diamond particles or silicon carbide particles fixed thereto, a ceramic blade, or a blade artificial tooth having a metal blade having a hardness of about 290 Hv or more.

  From the viewpoint of hardness (Vickers hardness), this can be expressed as follows. That is, the hardness of the artificial tooth that can be used as a grinding tooth is not particularly limited, but is preferably about 100 to 9000 Hv, more preferably about 200 to 9000 Hv, and still more preferably about 290 to 9000 Hv. .

  The difference in hardness between the grinding tooth and the work tooth (difference in Vickers hardness Hv) is not particularly limited. For example, about 80 to 8990 (for example, a low polymerization resin tooth or acrylic as the work tooth) Resin teeth are used, and porcelain teeth are used as grinding teeth, or blade artificial teeth having a blade having a contact portion hardness of about 100 Hv or more are used, preferably about 83 to 8990 (for example, low-polymerization resin as work teeth A tooth, and a porcelain tooth as a grinding tooth or a blade artificial tooth having a blade with a contact portion hardness of about 100 Hv or more, more preferably about 86 to 8990 (for example, a hardness of 10 as a work tooth) Low polymer resin teeth of about -14Hv are used, porcelain teeth are used as grinding teeth, or blade artificial teeth having a blade with a contact portion hardness of about 100Hv or more are used. ), More preferably about 186 to 8990 (for example, a low polymerization resin tooth having a hardness of about 10 to 14 Hv is used as the cutting tooth, and a ceramic tooth or a blade having a contact portion hardness of about 200 Hv or more is used as the grinding tooth. When using a blade artificial tooth having a blade, an even more preferably about 276-8990 (for example, a low-polymerized resin tooth having a hardness of about 10-14 Hv is used as a cutting tooth, and a ceramic tooth or a contact portion is used as a grinding tooth. When a blade artificial tooth having a blade with a hardness of about 290 Hv or more is used, most preferably about 276.5 to 8987.5 (for example, a low polymerization resin having a hardness of about 12.5 to 13.5 Hv as a work tooth) The tooth is used, and the tooth is a porcelain tooth, or a blade artificial tooth having a blade having a contact portion hardness of about 290 Hv or more).

  Further, considering that the occlusal force varies depending on the patient, the hardness difference between the tooth to be ground and the ground tooth may be varied for each patient. In other words, actually measure the patient's occlusal force or estimate it based on statistical values (eg, weight, physique (eg, the proportion of muscle weight in the body weight), gender, age, etc.) For example, the patient's occlusal force is grasped, and the hardness difference between the work tooth and the grinding tooth is set according to the grasped occlusal force value.

  For example, a patient with small occlusal force is configured to have a large hardness difference between the tooth to be ground and a ground tooth. Conversely, a patient with high occlusal force has a small hardness difference between the tooth to be ground and a ground tooth. Can be configured.

  In addition, considering the symptoms of the patient's jaw (the state of the temporomandibular joint at the time of occlusion) and the like, the hardness difference between the tooth to be ground and the grinding tooth may be varied for each symptom. In other words, the current state of the temporomandibular joint (for example, how much the temporomandibular joint at the time of occlusion deviates from the optimum position before treatment) is measured by radiography or estimated based on statistical values. The hardness difference between the work tooth and the grinding tooth is set in accordance with the current state of the grasped temporomandibular joint.

  For example, for a patient whose occlusal temporomandibular joint is significantly deviated from the optimal position, the hardness difference between the tooth to be ground and the ground tooth is configured to be large. For patients who have not, the hardness difference between the work tooth and the grinding tooth can be reduced.

  Thereby, the amount of wear per unit time of the tooth to be cut (in the above example, mandibular artificial teeth 55, 56, 57 for the lower jaw) can be adjusted according to the symptoms of the patient's jaw. For this reason, the orthodontic treatment period of the temporomandibular joint by mounting the treatment denture can be adjusted according to the symptoms of the patient's jaw and the like. That is, the temporomandibular joint can be corrected without difficulty in the optimal correction treatment period according to the symptoms of the patient's jaw.

  Of course, the hardness difference between the tooth to be ground and the ground tooth can be set in consideration of the symptoms of the patient's jaw and the magnitude of the bite force of the patient. If comprised in this way, the corrective treatment period suitable for a patient can be set more finely based on the patient's jaw symptom and occlusal force.

  In the above-described embodiment, the upper molar prosthetic teeth 35, 36, and 37, which are grinding teeth, are all artificial teeth having the same hardness (in the above example, all porcelain teeth) and The mandibular molar artificial teeth 55, 56, and 57 for tooth removal are all artificial teeth having the same hardness (in the above example, all acrylic resin teeth). That is, the hardness differences of the three pairs of grinding teeth and work teeth to be matched are all the same, but the present invention is not limited to this.

  It is also possible to configure the difference in hardness between the three pairs of grinding teeth and work teeth to be matched.

  For example, in any two adjacent sets of grinding teeth and work teeth, the difference in hardness between the back set of grinding teeth and work teeth is the difference in hardness between the front set of grinding teeth and work teeth. In comparison, it can be configured to be larger.

  Specifically, for example, the molar artificial teeth 35, 36, and 37 for the upper jaw are both porcelain teeth having the same hardness, and the molar portion of the molar artificial teeth 55, 56, and 57 for the lower jaw is used. The artificial tooth 55 is an acrylic resin tooth (18 to 20 Hv), and the molar artificial teeth 56 and 57 are low polymerization resin teeth (10 to 17 Hv) having a lower hardness and the same hardness.

  Furthermore, it can also be configured such that the difference in hardness between the three pairs of grinding teeth and work teeth to be matched is different.

  Specifically, for example, the molar artificial teeth 35, 36, and 37 for the upper jaw are both porcelain teeth having the same hardness, and the molar portion of the molar artificial teeth 55, 56, and 57 for the lower jaw is used. The artificial tooth 55 is an acrylic resin tooth (18 to 20 Hv), the molar artificial tooth 56 is a low-polymerization resin tooth (15 to 17 Hv) having a lower hardness, and the molar artificial tooth 57 is a low-polymerization resin having a lower hardness. Teeth (10-14 Hv).

  In this case, by actually measuring the patient's occlusal force or estimating it based on statistical values, etc., grasp the occlusal force of each molar artificial tooth in the patient, and according to each grasped occlusal force value The hardness difference between each set of grinding teeth and workpiece teeth may be set.

  As described above, when the mandibular head 91 of the mandible 9 moves to the uppermost portion 81a of the mandibular fossa 81 of the temporal bone 8, among the artificial teeth of the molar portion, a larger defect is found in the artificial tooth located deeper. Since (larger interference) tends to occur, the mandibular head 91 is configured to be more easily worn by the artificial teeth (cutting teeth) arranged at the position where the larger interference occurs, so that the mandibular head 91 has the lower jaw 81 Is guided to the uppermost portion 81a of the temporomandibular joint 81a, and the temporomandibular joint correction treatment effect is further enhanced.

  In each of the above-described examples, the case where only the artificial teeth behind the artificial teeth corresponding to the second premolar teeth among the molar prosthetic teeth for the lower jaw are configured to be cut teeth is illustrated. More generally, it can also be configured as follows.

  That is, it is possible to configure only all artificial teeth behind the artificial teeth corresponding to the second premolars in the lower molar artificial teeth for the lower jaw as the work teeth.

  As a specific example of such a configuration, in addition to the above-described examples, the maxillary molar artificial teeth 34, 35, 36 and 37 are both porcelain teeth having the same hardness, and the molar molar portion for the lower jaw Of the artificial teeth, only the innermost artificial tooth 57 (or the second artificial tooth 56 and 57 from the back) is an acrylic resin tooth having a lower hardness than the porcelain tooth, and the remaining molars for the lower jaw The case where the partial artificial teeth 54, 55, and 56 (or the artificial teeth 54 and 55) are porcelain teeth having the same degree of hardness as the mating artificial teeth for the upper jaw is included.

  As described above, in the case of configuring the artificial teeth only behind any artificial tooth behind the artificial tooth corresponding to the second premolar tooth among the molar part artificial teeth for the lower jaw, Since the artificial tooth adjacent to the front direction of any artificial tooth has the same hardness as the counter tooth, the adjacent artificial tooth is hardly worn even by the chewing action of the patient.

  For this reason, the adjacent artificial tooth serves as a fulcrum (fixed point) of movement of the mandible by orthodontic treatment of the temporomandibular joint, further promoting the wear of the artificial tooth (work tooth) beyond the arbitrary artificial tooth, It is possible to quickly guide the mandibular head to the uppermost part of the mandibular fossa.

  Further, the present invention provides a case in which only all artificial teeth behind the artificial teeth corresponding to the second premolars are used as the cut teeth among the molar prosthetic teeth for the lower jaw. It is not limited to.

  For example, the artificial tooth 54 corresponding to the first premolar for the lower jaw can also be configured to be a work tooth. Depending on the condition of the patient's temporomandibular joint, etc., when the artificial teeth 34 and 54 corresponding to the first premolars are also worn out (for example, the artificial tooth 54), the orthodontic treatment effect of the temporomandibular joint can be enhanced. Because there is also.

  As described above, in the present invention, all of the molar prosthetic teeth beyond the first premolars for the lower jaw can be configured as work teeth, and more generally, all the molars for the lower jaw. Of the partial artificial teeth, only one or more artificial teeth may be used as the cut teeth.

  In the above-described embodiment, the case where the work tooth is used only for the lower denture 4 has been described as an example, but the present invention is not limited to this. Conversely, the cut teeth may be used only for the maxillary denture 2 or the cut teeth may be mixed in the mandibular denture 4 and the maxillary denture 2.

  However, it is advantageous to use the cut tooth only for one of the lower denture 4 and the upper denture 2 because it is easy to reconstruct the occlusal plane.

  The anterior teeth artificial teeth are arranged so that the anterior teeth artificial teeth do not hit strongly during occlusal adjustment according to the general dentures. Therefore, the anterior teeth artificial teeth 31, 32, 33 constituting the upper denture 2 and the anterior teeth 51, 52, 53 constituting the lower denture 4 are worn by biting with the counter teeth. It is not necessary to consider so much, and an artificial tooth made of an appropriate material may be used.

  Therefore, the front tooth artificial tooth can be configured to have the same degree of hardness as the counter tooth so that any one of the front tooth artificial teeth does not wear greatly even if it comes into contact with the counter tooth. Specifically, in this example, the front teeth artificial teeth 31, 32, 33 constituting the upper denture 2 and the front teeth artificial teeth 51, 52, 53 constituting the lower denture 4 are all porcelain teeth. Is used.

  However, when it is better to adjust the occlusion for the anterior teeth artificial teeth, the anterior teeth artificial teeth 31 and 32 constituting the upper denture 2 are also formed for the anterior teeth artificial teeth as in the molar artificial teeth. , 33 and a whole or a part of the front teeth artificial teeth 51, 52, 53 constituting the denture for the lower jaw 4 to be opposed thereto, a hardness difference may be provided. That is, all or part of the front tooth artificial teeth 31, 32, 33, or all or part of the front tooth artificial teeth 51, 52, 53 may be the cutting teeth.

  As described above, in the present invention, not only molar artificial teeth but also all artificial teeth including anterior dental artificial teeth are objects to be cut. Further, all or a part of the artificial teeth beyond the arbitrary artificial teeth can be used as the cutting teeth. In particular, all the artificial teeth beyond the arbitrary artificial teeth can be used as the cutting teeth, and the arbitrary artificial teeth can be used. By making teeth adjacent to the front direction of the teeth (prosthetic teeth (including artificial teeth of dentures) or natural teeth (including restoration teeth)) having the same hardness as the counter teeth The adjacent teeth serve as fulcrums (fixed points) for the movement of the mandible by orthodontic treatment of the temporomandibular joint, further promoting the wear of artificial teeth (working teeth) beyond the above-mentioned arbitrary artificial teeth, It is possible to promptly guide to the uppermost part of the mandibular fossa.

  In this embodiment, the artificial tooth on the right side of the treatment denture 1 is described as an example, but the present invention is not limited to this. The present invention can be applied to the left artificial tooth of the treatment denture 1, and can also be applied to the left and right artificial teeth. When applied to left and right artificial teeth, a left-right symmetric configuration or a left-right asymmetric configuration can be used.

  In the case of a left-right asymmetric configuration, for example, by actually measuring or estimating based on statistical values, the left and right jaw symptoms of the patient and / or the size of the patient's left and right occlusal force, etc. And based on these, the hardness difference between the upper and lower teeth of the left and right artificial teeth can be set. If comprised in this way, even if a patient's jaw symptom, occlusal force, etc. are left-right asymmetric, the correction treatment period suitable for a patient can be set more finely.

  In this embodiment, an artificial tooth having a relatively low hardness is used as a work tooth and a corresponding tooth is used as a grinding tooth between artificial teeth to be mated. However, the present invention is limited to this. is not.

  For example, between the artificial teeth to be mated, the hardness of the contact portion with the counter tooth is relatively high, and the area of the contact portion with the counter tooth is smaller than that of a normal artificial tooth (preferably 1 / 7 to 1/5) Artificial teeth can be used as grinding teeth, and the counter teeth can be used as work teeth.

  Also, between artificial teeth to be mated, artificial teeth having relatively high hardness at the contact portion with the mating tooth and relatively rough surface roughness at the contact portion with the mating tooth are used as grinding teeth. The counter teeth can be used as work teeth. In order to increase the surface roughness of the grinding teeth, for example, sand blasting with alumina (for example, a particle size of about 100 to 200 micrometers) may be performed.

  In addition, between artificial teeth to be mated, the hardness of a contact portion with the counter tooth is relatively high, and an artificial tooth having one or more sharp edges at the contact portion with the counter tooth is ground. The counter teeth can be used as work teeth. Examples of sharp edges include those having an edge angle of 90 degrees or less and a minimum edge radius of 0.1 mm or less.

  In short, artificial teeth that are set so that the amount of wear associated with the chewing action is larger than that of the counter teeth may be used as the work teeth, and the counter teeth may be used as the grinding teeth.

  Further, in the above-described embodiment, in order to perform the optimal orthodontic treatment of the temporomandibular joint, the hardness difference between the work tooth and the grinding tooth is appropriately determined according to the patient's jaw symptoms, the patient's occlusal force, and the like. Although an example configured to be set / changed has been described, the present invention is not limited to this. Depending on the patient's jaw symptoms and the patient's occlusal force, etc., in addition to the hardness difference between the tooth to be ground and the grinding tooth, for example, the area of the contact portion of the grinding tooth with the counter tooth, surface roughness, The shape (the presence / absence of edges, the number of edges, the degree of edge sharpness (angle formed by edges, minimum radius), etc.) and the like may be set / changed. In order to perform optimal orthodontic treatment of the temporomandibular joint, the main point is that the amount of wear on the work teeth associated with the chewing action, in other words, the grinding in the chewing action, depending on the patient's jaw symptoms and the patient's biting force, etc. What is necessary is just to set and change the grinding ability of a tooth suitably.

  In this embodiment, the case of a complete denture is described as an example, but the present invention is not limited to this. For example, the present invention can be applied to partial dentures. Further, the grinding teeth are not limited to artificial teeth, and for example, prosthetic teeth other than artificial teeth and natural teeth (including restoration teeth) can be ground teeth.

  In addition, the said various variations in 1st Embodiment can be implemented in arbitrary combinations except the thing which cannot be combined in the property.

  Next, the operation of the treatment denture 1 shown in FIGS. 1 and 2 will be described.

  FIG. 3 is a side view conceptually showing an occlusal state when a predetermined period has passed after the treatment denture 1 is mounted, that is, when orthodontic treatment of the temporomandibular joint is almost completed.

  FIG. 4 is an enlarged view of a portion of the treatment denture 1 in FIG.

  FIG. 5 is a side view conceptually showing a state in which the final denture 7 is attached to the patient instead of the treatment denture 1.

  As shown in FIG. 2, in the initial occlusal state in which the treatment denture 1 is attached to the patient, the occlusion of the upper denture 2 and the lower denture 4 is not inconvenient. However, since the mandibular head 91 of the mandible 9 is located away from the uppermost part 81a of the mandibular fossa 81 of the temporal bone 8, the state of the joint of the jaw is not good.

  As described above, the optimum position of the temporomandibular joint is a position where the lower jaw 91 does not move further upward in the lower jaw 81 in the occlusal state, that is, the lower jaw 91 is at the uppermost portion 81 a of the lower jaw 81. This is because it is considered to be in a position.

  When mastication is performed in the state shown in FIG. 2, the maxillary denture 2 and the mandibular denture 4 are in an occlusal state mainly due to the action of the masseter (not shown), and the upper and lower molar artificial teeth 35, 36 close to the masseter A large pressing force acts between 37 and 55, 56, 57. Therefore, by repeating mastication, wear of the molar prosthetic teeth due to these pressing forces occurs.

  In this example, wear occurs on the molar prosthetic teeth 55, 56, 57 (machined teeth) of the lower denture 4 with relatively low hardness. When wear occurs in the molar artificial teeth 55, 56, 57, the position of the mandibular head 91 in the occlusal state moves upward in the mandibular fossa 81 accordingly.

  In this way, repeated mastication selectively wears the molar prosthetic teeth 55, 56, and 57 (work teeth) of the lower denture 4 so that the adjustment work is automated to some extent and the adjustment work by the practitioner. Difficulty and frequency are reduced. For example, the adjustment work by the practitioner, which has conventionally been necessary every day every two to three days depending on the situation, can be performed only once a month.

  As this is repeated, the position of the mandibular head 91 in the occlusal state reaches the uppermost part 81 a of the mandibular fossa 81. This state is the state shown in FIG.

  In this state, since the mandibular head 91 does not move any further in the mandibular fossa 81 during occlusion, the occlusal force by the masseter muscle is based on the lever principle using the uppermost part 81a of the mandibular fossa 81 as a fulcrum. However, it works most efficiently between the upper and lower artificial teeth. In other words, this state is a state where the joint of the jaw has come to the optimum position. If it will be in this state, orthodontic treatment of the temporomandibular joint by the treatment denture 1 will be complete | finished.

  FIG. 4 shows an enlarged view of the state of the artificial tooth in FIG. In the figure, a portion indicated by a two-dot chain line is a portion disappeared due to wear accompanying chewing (or wear accompanying chewing and auxiliary adjustment work by a practitioner). A portion of the molar artificial teeth 55, 56, 57, which are the cut teeth, disappears due to wear or the like, but the remaining artificial teeth are not changed. Of the molar prosthetic teeth 55, 56, and 57, the deeper teeth have a larger amount of wear.

  When the orthodontic treatment of the temporomandibular joint using the treatment denture 1 is completed, the occlusion is obtained in that state (that is, the state where the temporomandibular joint is at the optimum position), and the occlusion is obtained based on the obtained jaw position. The final denture 7 shown in FIG. 7 is created by reconstructing the plane, rearranging the artificial teeth, and the like.

  Next, a treatment denture 101 according to a second embodiment of the present invention will be described. In 1st Embodiment, although the case where the molar tooth artificial tooth of the upper denture 2 was used, ie, the case where an anatomical artificial tooth was used as a grinding tooth, was demonstrated as an example, this invention is not limited to this. Functional artificial teeth can also be used as the grinding teeth. Moreover, an anatomical artificial tooth and a functional artificial tooth can also be mixed as a grinding tooth.

  FIG. 6A is a plan view of the maxillary denture 102 constituting the treatment denture 101. FIG. 6B is a plan view of the lower denture 104 that constitutes the treatment denture 101.

  As shown in FIG. 6A, among the molar artificial teeth of the maxillary denture 102, artificial teeth 135, 136, and 137 corresponding to the second premolar teeth are blade artificial teeth (blades) that are a kind of functional artificial teeth. Artificial teeth with 106).

  In this example, lingualized occlusion (lingual occlusion) is adopted as the occlusal mode, and therefore the tongue of the occlusal heads (protrusions of the crown occlusal surface) of the artificial teeth 135, 136, and 137. The side bites are each composed of a blade 106. In short, depending on the occlusal mode, the biting head that is likely to wear the interference portion of the counter teeth may be constituted by the blade 106.

  As the artificial teeth 135, 136, and 137, an existing blade artificial tooth can be used. However, in the case of an existing blade artificial tooth, the artificial tooth 136 corresponding to the first molar tooth has two lingual cusps. Of these, only the second premolar side (front side) cusp is composed of the blade 106, and the second premolar side (back side) cusp is not a blade but a part of the artificial tooth body, and the counter teeth (covered) Generally, it is made of a material (for example, hard resin) having the same degree of hardness as that of (tooth cutting). For this reason, at the time of mastication, the bite head on the second molar side (back side) of the artificial tooth 136 comes into contact with the counter teeth, and the counter teeth do not wear any more, and the function of the present invention cannot be sufficiently exhibited. Sometimes.

  Therefore, as shown in FIG. 6A, in this example, for the artificial tooth 136 corresponding to the first molar tooth, any of the two lingual cusps (that is, the cusp of the second premolar side and the second cusp Each of the molar heads) is configured with a blade 106.

  The material of the blade 106 is not particularly limited as long as it has a relatively high hardness with respect to the counter tooth (working tooth). For example, it is made of hard resin (20 to 47 Hv), metal (100 to 365 Hv), ceramic (460 to 500 Hv), diamond particles (9000 Hv) and silicon carbide particles (2150 to 2200 Hv) fixed to the contact surface with the mating teeth can be used. In this example, a cobalt chromium alloy system (290 to 365 Hv) having a relatively high hardness is used as the material of the blade 106.

  The contact area of the blade 106 with the opposing teeth at the time of occlusion is not particularly limited, but it is 1 / of that of general artificial teeth (ordinary artificial teeth such as porcelain teeth and hard resin teeth). About 5 to 1/7 is preferable.

For example, if the diameter of the cusp head in contact with the paired teeth in a normal artificial tooth is 0.2 to 0.5 mm, if about 1/7 of the area is preferable, it becomes 0.00448 to 0.027 mm ² . If about 1/5 of the area is preferable, it is 0.00628 to 0.039 mm ² . Therefore, the contact area with the opposing teeth at the time of occlusion per blade 106 is preferably 0.00448 to 0.039 mm ² .

  Thus, by using blade artificial teeth as grinding teeth, high hardness can be obtained, and at the same time the contact area with the counter teeth that are the work teeth can be reduced, so that the contact pressure can be increased, and the orthodontic treatment period It is possible to increase the amount of wear per unit time of the counter teeth.

  The shape of the blade is not particularly limited, but in this embodiment, a blade 106 having a cross-shaped blade projecting from the crown occlusal surface toward the opposing teeth is used. By using the blade having such a shape, it is possible to effectively wear the counter teeth corresponding to the front, rear, left and right movements of the counter teeth during mastication.

  Further, as described above, the shape of the blade artificial tooth may be a shape in which the blade is embedded in an artificial tooth body made of hard resin or the like. For example, a plurality of blades may be made of the same or different materials ( For example, it may be in a form connected with metal (in this case, the artificial tooth body described above does not exist), and is not particularly limited.

  The remaining configuration and operation of the treatment denture 101 are the same as those of the treatment denture 1. Moreover, the variation in the treatment denture 1 is applied also to the treatment denture 101 except the thing which cannot be applied to the treatment denture 101 by the property.

  Next, a treatment denture 201 according to a third embodiment of the present invention will be described. FIG. 7A is a plan view of the maxillary denture 202 that constitutes the treatment denture 201. FIG. 7B is a plan view of the lower jaw denture 204 constituting the treatment denture 201.

  In the treatment denture 101 (see FIG. 6A) in the second embodiment described above, the artificial tooth 136 corresponding to the first molar of the maxillary denture 102 is any of the two lingual cusps (that is, (Both the second premolar side cusp and the second premolar side cusp) are constituted by the blade 106, but the first molar of the upper denture 202 in the treatment denture 201 shown in FIG. The configuration of the corresponding artificial tooth 236 is different from this.

  As shown in FIG. 7A, regarding the artificial tooth 236, the point on the second premolar side (front side) of the two lingual cusps is constituted by the blade 106. However, the portion 236a corresponding to the second molar side (back side) cusp is formed so as to be lower than the height of the normal cusp. This is different from the case of the artificial denture 101, and different from the case of the existing blade artificial tooth.

  That is, the portion 236a corresponding to the second molar side (back side) cusp of the artificial tooth 236 is configured to be low so as not to come into contact with the counter teeth when the upper denture 202 and lower denture 204 are occluded. ing. For this reason, at the time of mastication, there is no inconvenience that the counter tooth is not worn further because the counter tooth is brought into contact with the bite head on the second molar side (back side) of the artificial tooth.

  Therefore, for example, it is possible to sufficiently exhibit the function of wearing the counter teeth by simply scraping the head of the second molar side (back side) of the existing blade artificial tooth.

  In FIG. 7A, of the two lingual cusps of the artificial tooth 236, the cusp of the second premolar side (front side) is constituted by the blade 106, and the cusp of the second molar side (back side) The portion 236a corresponding to is formed so as to be lower than the height of the normal cusp, but the opposite, that is, the cusp on the second molar side (the back side) is constituted by the blade 106, and the second premolar The portion corresponding to the side (front side) cusp may be formed to be lower than the normal cusp height.

  In short, one of the two lingual cusps of the artificial tooth 236 is constituted by the blade 106, and the portion corresponding to the other cusp is occluding the upper denture 202 and the lower denture 204 at the time of occlusion. What is necessary is just to form so that it may become lower than the height of a normal cusp head so that it may not contact a paired tooth.

  The remaining configuration and operation of the treatment denture 201 are the same as those of the treatment denture 101. Moreover, the variation in each above-mentioned embodiment is applied also to the treatment denture 201 except the thing which cannot be applied to the treatment denture 201 by the property.

  Next, a treatment denture 301 according to a fourth embodiment of the present invention will be described. FIG. 8A is a plan view of an upper denture 302 that constitutes the treatment denture 301. FIG. 8B is a plan view of a lower denture 304 constituting the treatment denture 301.

  The treatment denture 301 shown in FIG. 8A and the aforementioned treatment denture 201 (see FIG. 7A) are both artificial teeth 336 (FIG. 8A) and 236 (FIG. 7A) corresponding to the first molar of the maxillary denture. However, in the treatment denture 201, the second premolar side (front) cusp of the two lingual cusps of the artificial tooth 236 is the blade 106. The portion 236a corresponding to the second molar side (back side) cusp is formed to be lower than the height of the normal cusp. In the treatment denture 301, the artificial tooth 336 is formed. The two portions 336a and 336b corresponding to the two lingual cusps are formed to be lower than the height of the normal cusp, and the height of the normal cusp is between these portions 336a and 336b. Have comparable height In that the blade 106 is erected, different.

  That is, the portions 336a and 336b corresponding to the two lingual cusps of the artificial tooth 336 are both configured to be low so as not to come into contact with the counter teeth when the upper denture 302 and the lower denture 304 are occluded. ing. For this reason, at the time of mastication, there is no inconvenience that the two teeth heads of the artificial tooth and the counter teeth come into contact with each other and the counter teeth are not worn any more.

  Thus, by arranging the blade 106 at the intermediate position between the portions 336a and 336b corresponding to the two lingual cusps of the artificial tooth 336, the counter teeth can be efficiently worn.

  The remaining configuration and operation of the treatment denture 301 are the same as those of the treatment denture 201. Moreover, the variation in each above-mentioned embodiment is applied also to the treatment denture 301 except the thing which cannot be applied to the treatment denture 301 on the property.

  In the invention described in the second to fourth embodiments, the artificial tooth corresponding to the first molar of the maxillary denture can be grasped as follows.

  That is, at least one cusp of two lingual cusps (the second premolar side cusp and the second molar side cusp) of the artificial tooth corresponding to the first molar of the upper denture A portion corresponding to a cusp that is configured with a blade or has a height equivalent to the height of a normal cusp at an intermediate position between both cusps and is not configured with a blade, When the upper denture and the lower denture are occluded, they are formed to be lower than the normal head height so as not to come into contact with the opposing teeth.

  Next, a treatment denture 401 according to a fifth embodiment of the present invention will be described. FIG. 9A is a plan view of the maxillary denture 402 constituting the treatment denture 401. FIG. 9B is a plan view of a lower denture 404 constituting the treatment denture 401.

  In the treatment denture 401, the blade 406 attached to the artificial tooth is configured to be replaceable during orthodontic treatment of the temporomandibular joint, and therefore the treatment denture 301 that is not supposed to replace the blade 106 (see FIG. 8A)).

  10 is a drawing conceptually showing an XX cross section of an artificial tooth 436 corresponding to the first molar tooth of the maxillary denture 402 shown in FIG. 9A. As shown in FIG. 10, a blade holding frame 407 for holding the blade 406 is embedded and fixed to an appropriate part of the main body 436 c of the artificial tooth 436.

  The shape and structure of the blade holding frame 407 are not particularly limited, but in this example, the blade holding frame 407 is formed in a two-step stepped bottomed cylindrical shape having a large diameter portion 407a and a small diameter portion 407b following the large diameter portion 407a. An internal thread is formed inside the small diameter portion 407b. The material of the blade holding frame 407 is not particularly limited. For example, a dental metal such as titanium can be used, and preferably the same material as that constituting the base 406b of the blade 406 described later. It is.

  A method for joining the blade holding frame 407 and the main body 436c of the artificial tooth 436 is not particularly limited, and examples thereof include mechanical joining such as fitting and press-fitting, joining by adhesion, and chemical joining. As an adhesion method, for example, 4-META / MMA-TBB adhesive resin can be used.

  The blade 406 includes a blade portion 406a and a base portion 406b following the blade portion 406a. The base portion 406b includes a substantially cylindrical male screw portion 406c and a disc portion 406d following the male screw portion 406c. By screwing the male thread portion 406 c of the blade 406 into the small diameter portion 407 b of the blade holding frame 407, the screw-side end surface of the disk portion 406 d of the blade 406 and the stepped portion of the blade holding frame 407 come into contact. As a result, the blade 406 is fixed to the artificial tooth 436.

  The blade portion 406a and the base portion 406b may be integrally formed using the same material, but may be formed separately and combined with each other. When the blade portion 406a and the base portion 406b are bonded, the method is not particularly limited, and examples thereof include mechanical bonding such as fitting and press-fitting, bonding by adhesion, and chemical bonding.

  In the example shown in FIG. 10, the blade portion 406 a has a shape similar to that of the above-described blade 106, that is, a shape in which a cross-shaped blade protrudes from the occlusal surface toward the opposing teeth, and is similar to the blade 106. It is comprised by the material of. In this embodiment, the grinding ability differs (for example, hardness difference, area, surface roughness, and shape of the contact portion with the counter tooth (the presence or absence of edges, the number of edges, the degree of edge sharpness (edge A plurality of blades 406 having different blade portions 406a (such as angles and minimum radii) are prepared, and the blades 406 can be appropriately replaced according to the progress of orthodontic treatment of the temporomandibular joint. is there.

  For example, during the orthodontic treatment of the temporomandibular joint using the treatment denture 401 having the artificial tooth 436 to which the blade 406 having the blade portion 406a made of cobalt chrome alloy is attached, the amount of wear of the counter teeth of the artificial tooth 436 is small. If it is determined that the amount is too large, the blade is replaced with a blade having a blade portion (for example, a blade portion made of ceramic) having a higher grinding ability (for example, higher hardness).

  Conversely, if it is determined that the amount of wear of the counter teeth of the artificial tooth 436 is too large, a blade portion having a lower grinding ability (for example, lower hardness) (for example, a metal blade portion having a hardness of about 100 Hv or a hard portion) The blade is replaced with a blade having a resin blade portion.

  By comprising in this way, the grinding tooth which has the optimal grinding ability can be selected suitably also including the case where it sets so that a counter tooth may not be ground at all, seeing the progress of orthodontic treatment of a temporomandibular joint. For this reason, based on the change of the symptom of the patient's jaw, the change of the occlusal force, etc., the temporomandibular joint correction treatment suitable for the patient can be performed more finely.

  Here, the example of the artificial tooth 436 has been described, but the present invention can also be applied to other artificial teeth 435 and 437 having blades. Of course, the present invention may be applied to all artificial teeth having blades, or the present invention can be applied only to some artificial teeth among artificial teeth having blades.

  The remaining configuration and operation of the treatment denture 401 are the same as those of the treatment denture 301. Moreover, the variation in each above-mentioned embodiment is applied also to the treatment denture 401 except the thing which cannot be applied to the treatment denture 401 by the property. Furthermore, the present invention can also be applied to the above-described treatment dentures 101 and 201.

  In addition, although the case where a braid | blade and the main body of an artificial tooth were couple | bonded as an example comprised so that replacement | exchange of the braid | blade attached to the artificial tooth was possible (refer FIG. 10), the aspect of braid | blade replacement | exchange is this It is not limited.

  FIG. 11 is a view relating to another example of a dental prosthesis 501 according to a sixth embodiment of the present invention, that is, another example in which a blade attached to an artificial tooth is replaceable. Similar to FIG. It is drawing which shows notionally the suitable part cross section of the artificial tooth 536 equivalent to the 1st molar of the maxillary denture which comprises the denture 501. FIG.

  As shown in FIG. 11, the blade 506 in this embodiment includes a blade portion 506a and a base portion 506b following the blade portion 506a. The base portion 506b includes a substantially cylindrical column portion 506c and a disc portion 506d that follows the column portion 506c.

  A blade mounting recess 536d is formed on the occlusal surface side of the body 536c of the artificial tooth 536. The base 506b of the blade 506 is inserted into and fixed to the blade mounting recess 536d via a fixing spacer 507 such as an adhesive or a resin (for example, the above-mentioned low polymerization resin). In order to remove the blade 506 from the artificial tooth 536, for example, the fixing spacer 507 may be removed by a known method (heating, solvent application, cutting, etc.).

  The remaining configuration and operation of the treatment denture 501 are the same as those of the treatment denture 401. Moreover, the variation in each above-mentioned embodiment is applied also to the treatment denture 501 except the thing which cannot be applied to the treatment denture 501 in the property.

  In each of the above-described embodiments, for example, as shown in FIG. 1B, as a form of the occlusal surface of the artificial teeth 55, 56, and 57 corresponding to the tooth to be cut, a pit and fissure (a groove between the cusp head) on the occlusal surface However, the present invention is not limited to this.

  FIG. 12 is a plan view of a lower denture 604 constituting a treatment denture 601 according to the seventh embodiment of the present invention. The occlusal surfaces of the artificial teeth 655, 656, and 657 corresponding to the work teeth constituting the lower denture 604 are flat (a form in which the occlusal surface is flat and there is no pit and fissure on the occlusal surface).

  By flattening the shape of the occlusal surface of the work tooth, the engagement between the opposing teeth is suppressed, and the mandibular position is not hindered by the mandibular position movement relative to the upper jaw when the mandibular head is guided to the uppermost part of the mandible. This is because the movement is smoothly performed. As a result, temporomandibular joint correction treatment can be performed more efficiently. However, as long as the lower jaw slides smoothly, there is no problem even if the shape of the pit and fissure is provided on the occlusal surface of the work tooth.

  In addition, only a portion of the artificial teeth corresponding to the cut teeth has a flat occlusal shape, or pit fissures on the occlusal surface of the cut teeth within the range where the lower jaw slides smoothly. The form of a groove can also be given.

  The remaining configuration and operation of the treatment denture 601 are the same as those of the treatment denture 1. Moreover, the variation in each above-mentioned embodiment is applied also to the treatment denture 601 except the thing which cannot be applied to the treatment denture 601 on the property.

  Although the present invention has been described above as a preferred embodiment, the terminology has been used for description rather than limitation and departs from the scope and spirit of the present invention. Without departing from the scope of the appended claims. Also, while the above describes only some exemplary embodiments of the present invention in detail, those skilled in the art will recognize the exemplary implementations described above without departing from the novel teachings and advantages of the present invention. It will be readily appreciated that many variations in form are possible. Accordingly, all such modifications are intended to be included within the scope of the present invention.

1: denture for treatment 2: denture for maxilla 4: denture for mandible 34: molar prosthesis for maxilla 35: molar prosthesis for maxilla 36: molar prosthesis for maxilla 37: molar prosthesis for maxilla Tooth 54: Molar artificial tooth for mandible 55: Molar artificial tooth for mandible 56: Molar artificial tooth for mandible 57: Molar artificial tooth for mandible 81: Mandibular fossa 81a: Top of mandibular fossa 91: Mandibular head

Patent Applicant Tamio Ohmae Applicant Agent Patent Attorney Koichi Tagawa

Claims (5)

A treatment denture worn by the patient prior to final denture creation,
It has a denture for maxilla and / or a denture for mandible with artificial teeth planted on the denture base,
Wear associated with the chewing action of artificial teeth constituting either the upper denture or the lower denture, which may cause interference with the opposing teeth when the temporomandibular joint approaches the optimum position It is a work tooth that is an artificial tooth set so that the amount is larger than the counter tooth,
It was configured to guide the temporomandibular joint to the optimal position by wearing the work teeth with chewing action,
A dental prosthesis characterized by The treatment denture according to claim 1,
The hardness of the contact portion with the counter teeth in the work tooth is configured to be lower than that of the counter teeth,
It is characterized by. The treatment denture according to claim 2,
The work tooth is composed of a synthetic resin at the contact portion with the counter tooth,
The counter teeth of the cut teeth are artificial teeth with blades;
It is characterized by. The treatment denture according to claim 3,
The artificial tooth provided with the blade is configured such that the blade can be replaced during orthodontic treatment of the temporomandibular joint,
It is characterized by. The treatment denture according to any one of claims 1 to 4,
The cut tooth is an artificial tooth behind the second premolar,
It is characterized by.

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