JP2015231520A - Temporomandibular joint protector and dental treatment tool - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a temporomandibular joint protector which permits a required mouth opening according to a need, prevents temporomandibular joint luxation effectively, and enables not only treatment of various temporomandibular joint disorders but also taking meal and performing of dental treatment.SOLUTION: The temporomandibular joint protector can prevent temporomandibular joint luxation and includes: a head fitted part 3 fitted on a head part; and a mouth opening restriction part 5 applying traction force from a chin part 25 to a mandible via a predetermined portion of a mandible bottom part. The mouth opening restriction part can elastically energize a mandibular condyle 22 of the mandible toward a mandibular fossa 23 of a temporal bone 21 in a predetermined mouth opening range of the mandible and restricts the opening deformation of the mandible not to exceed a predetermined range.

Description

  The present invention relates to a temporomandibular joint protector and a dental treatment instrument. More specifically, the present invention relates to a temporomandibular joint protector and a dental treatment instrument that can prevent dislocation of the temporomandibular joint and can secure an opening amount (displacement of the mandible) necessary for dental treatment or eating.

  The temporomandibular joint is the joint between the mandible and the temporal bone. The rear upper part of the mandible is bifurcated, and the mandibular head at the rear end of the protrusion is fitted into the concave mandibular fossa in the temporal bone. In front of the mandible, there is a joint nodule that swells downward. When eating or talking, the mandible is rotationally displaced (moved) with the mandibular head fitted into the mandible.

  On the other hand, in a state where the mouth is opened consciously, the mandibular head is displaced to the lower side of the joint nodule while performing the rotational displacement. That is, the temporomandibular joint can be in a kind of dislocation state (insufficient dislocation) even in normal opening movement.

  When the mandibular head is disengaged from the mandibular fossa and rides forward over the joint nodule, a dislocation state (anterior dislocation) occurs. If the masticatory muscles become fatigued or the ligaments of the temporomandibular joint are weakened due to aging, temporomandibular joint dislocation is likely to occur when the mouth is greatly opened, and reduction by itself is difficult. Further, when temporomandibular joint dislocation occurs, soft tissues such as joint capsules may be damaged. In addition, temporomandibular joint dislocation often recurs habitually.

  In order to treat and prevent recurrence of temporomandibular joint dislocation, it is effective to fix the temporomandibular joint so that the mandible is not displaced. As a technique for fixing the temporomandibular joint, the mandible is often fixed using a bandage so as not to leave the temporal bone. Further, a device for preventing chin dislocation as described in Patent Document 1 has also been proposed.

Utility model registration No. 3091155

  Dislocation of the temporomandibular joint can be reliably prevented by fixing the temporomandibular joint using a bandage or the like so that the mandible does not displace from the position along the temporal bone. However, if the temporomandibular joint is fixed in a closed state, it becomes impossible to open it, so you can not eat or brush your teeth, and if you vomit you will not be able to drain the vomit, so there is a danger of suffocation There is also. Therefore, it is practically difficult to fix the temporomandibular joint for a long period of time, and temporomandibular joint dislocation is a common cause of recurrence.

  Further, when performing dental treatment, a larger opening is required than when eating. For this reason, temporomandibular joint dislocation tends to occur during dental treatment. In addition, when treating a patient undergoing temporomandibular joint dislocation treatment, it is necessary to remove the bandage and the like, but the risk of recurrent temporomandibular joint dislocation also increases.

  Furthermore, it is preferable to fix the temporomandibular joint in the acute phase of temporomandibular joint dislocation, but if the fixation period is long, the strength of the muscles around the temporomandibular joint such as the masticatory muscles is weakened, making it difficult to eat. Also, the risk of recurrent temporomandibular joint dislocation increases.

  The present invention has been devised in order to solve the above-described problems, and can allow a required opening as needed and effectively prevent temporomandibular joint dislocation, and can treat only various temporomandibular disorders. It is an object of the present invention to provide a temporomandibular joint protector capable of eating and performing dental treatment.

  The present invention is a temporomandibular joint protector that can prevent dislocation of the temporomandibular joint, and applies a traction force to the mandible via a predetermined part of the mandibular base from the head part and the mandibular part to be attached to the head. An opening restricting portion for allowing the mandible to be elastically biased toward the mandibular fossa of the lower temporal bone in a predetermined opening range of the mandible, and the opening of the mandible The displacement is restricted so as not to exceed a predetermined range.

  In the present invention, the opening restricting portion is configured to be able to elastically bias the mandibular head of the mandible toward the mandibular fossa of the temporal bone within a predetermined opening range of the mandible. For this reason, the rotational displacement of the mandible is allowed in a state in which a force in the direction opposite to the direction causing the temporomandibular joint dislocation is applied to the mandible, and the opening operation in this range is allowed. Therefore, it is possible to eat while effectively preventing temporomandibular joint dislocation.

  The direction in which the elastic force is applied is not particularly limited as long as it acts so as not to disengage the mandibular head from the mandibular fossa. For example, in order to prevent forward dislocation, the traction force can be configured to act obliquely backward from the chin portion. It is also possible to apply a traction force that acts upward from directly below the temporomandibular joint. Furthermore, it is possible to apply a traction force acting in the horizontal direction by forming the head-attached portion so as to cover from the rear head to the neck and extending the opening restricting portion from the neck.

  In addition, since the mandible can be displaced in a state of being elastically biased, it is possible to supplement masticatory muscles such as aging with weakened muscular strength. For this reason, the effect that a meal etc. can be performed easily can also be expected. The magnitude of the elasticity is not particularly limited. For example, it can be adjusted so that the elasticity necessary for maintaining the closed state is applied. Furthermore, the active opening force of general adults is 10 kg male and 8 kg female, and it has been reported that the swallowing ability increases by increasing the opening force. Therefore, the temporomandibular joint protector according to the present invention can be used to maintain or increase the opening force.

  The opening restriction portion is configured to restrict the opening displacement of the mandible so as not to exceed a predetermined range. In order to prevent dislocation of the temporomandibular joint, it is preferable for the doctor or dentist to consider the state of the temporomandibular joint and to set a safe range in which the opening is allowed and to regulate the amount of displacement accordingly. For example, when it is confirmed that the dislocation is not performed with an opening amount of 20 mm (displacement amount from the closed state), it can be set so as not to open more than 20 mm. The set value of the opening amount can also be obtained by re-dislocation of the patient's temporomandibular joint. As a result, even in patients who frequently experience temporomandibular joint dislocation, it is possible to perform daily life such as eating while reliably preventing temporomandibular joint dislocation. In addition, dislocation of the temporomandibular joint can be prevented while the opening is allowed, so that vomiting can be easily removed even if vomiting occurs. There is no danger of suffocation. The amount of opening displacement for excreting the vomit is preferably secured to 10 mm or more as long as temporomandibular joint dislocation does not occur. As a result, the temporomandibular joint protector according to the present invention can be used for various treatments around the temporomandibular joint.

  The opening restricting portion may be configured to restrict the displacement of the mandible within a range in which the mandibular head does not get over the joint nodules of the temporal bone. As a result, only rotational displacement of the mandibular head in the mandibular fossa is allowed, and it is possible to make a large opening to some extent while effectively preventing temporomandibular joint dislocation, which is necessary when performing dental treatment or the like. It is also possible to ensure the opening amount.

  The restriction value of the opening displacement that can prevent temporomandibular joint dislocation can be set for each patient depending on the skeleton and state of the temporomandibular joint and for each scene that requires opening. For example, it can be set for each patient according to the case of brushing teeth, eating meals, or performing dental treatment. Thereby, in each said scene, not only a patient but a doctor and a dentist can also feel safe.

  The form of the head-attached portion is not particularly limited as long as it is configured to back up the traction force acting from the opening restricting portion. For example, a hat-shaped head part can be employed. In addition, a helmet-like head-attached portion can be employed using a hard material. Moreover, it can also comprise so that it may form so that a neck part may be covered from a head, the direction in which the said opening control part extends may be changed, and the direction of the force which acts may be adjusted.

  The temporomandibular joint protector is configured to include a holding part that is attached to a predetermined part of the mandibular base from the genital part and applies a traction force to the mandible, and the opening restricting part includes the head covering part. The holding portion can be connected to cause a traction force to act.

  If the said holding | maintenance part can make traction force act in a required direction, a mounting position and a form will not be specifically limited. For example, it is possible to employ a hook-shaped holding portion that adheres to the chin portion. Further, if necessary, the holding portion may be configured so as to be hung around the proximal end portions of the left and right mandibles, and a force for pulling the mandible upward may be applied. Furthermore, a holding part that can be held so as to cover the entire bottom surface of the mandible can also be employed.

  The configuration of the opening restricting portion is not particularly limited. For example, the opening restricting portion may include an elastic member that allows elasticity while allowing the mandible to be displaced, and a restricting member that restricts the displacement of the mandible so as not to exceed a predetermined range. it can.

  The form of the elastic member and the material constituting it are not particularly limited. For example, the elastic member can be formed from a string-like or belt-like rubber material.

  The shape of the regulating member and the material constituting the regulating member are not particularly limited. The restricting member is made of a material that does not elastically expand or contract or is difficult to deform, and is configured so that the mandible does not exceed a predetermined displacement. For example, a metal or resin string-like or band-like member that does not expand and contract can be employed. It can also be formed from a strip-shaped woven fabric or the like that has a very low expansion / contraction ratio with respect to the elastic member. Since the displacement of the mandible can be reliably restricted by the restriction member, temporomandibular joint dislocation can be reliably prevented.

  The elastic member and the regulating member can be formed in an integrally formed band shape or string shape. For example, by integrally knitting a thin string-like elastic member and a regulating member, a knitted body in which a predetermined amount of elastic expansion and contraction is allowed and further elongation is restricted can be configured.

  Further, the opening restricting portion may be configured to include the belt-like elastic member and the belt-like restricting member. By forming the elastic member and the restricting member in a band shape and arranging them so as to be independently deformable, the opening restricting portion can be configured without taking up space. In a scene where the opening is allowed, the elastic member is elastically stretched by a predetermined amount, and the regulating member is slackened and held between the head-attached portion and the holding portion. The On the other hand, when a predetermined opening displacement occurs, the restriction member is tensioned to restrict the mandible from further displacement. Thereby, opening in the range which a temporomandibular joint does not dislocation is attained.

  The opening restricting portion is attached to a predetermined portion of the mandible from the chin portion, and allows a predetermined opening displacement while applying a predetermined elastic force to the mandible in a predetermined opening range of the mandible. A holding member and an opening restricting member that restricts the displacement of the holding member corresponding to the opening displacement of the mandible so as to prevent the opening displacement of the mandible from exceeding a predetermined range. Can do.

  The holding member is attached to a predetermined portion of the mandibular base from the mental portion, and configured to allow a predetermined displacement while applying a predetermined elastic force to the mandible in a predetermined opening range of the mandible. Is done. That is, the holding member is configured such that itself can exert an elastic force.

  As the holding member, for example, an elastic member formed integrally with the head-attached portion can be employed. For example, the holding member can be configured to allow the displacement while being applied to the mandible while being hung around the head.

  On the other hand, the opening restricting member may be configured to include a recess that allows the displacement of the holding member. That is, when the mandible is in the closed position by the holding member, a predetermined gap is formed between the bottom of the recess and the holding member, while depending on the displacement accompanying the opening of the mandible, When the holding member enters the gap, a predetermined displacement of the mandible is allowed.

  By forming the opening restricting member from a material that does not elastically expand or contract as a whole, or a material that does not easily deform, the deformation of the holding member in the recess is allowed. The degree of elastic expansion and contraction and the degree of difficulty of deformation are sufficient if they can regulate the displacement of the mandible. Further, if a material having a larger deformation resistance than the holding member is employed as the opening restricting member, a desired effect can be expected. The opening restricting member can restrict the opening displacement of the mandible so as not to exceed a predetermined range.

  Each of the holding member and the regulating member can be formed with a band-shaped member. Further, the head-attached portion may be formed on the holding member and the regulating member, respectively, and these members may be mounted so as to be relatively movable in the surface direction.

  Depending on the person wearing the temporomandibular joint protector according to the present invention, the distance between the head covering portion and the mandible differs. Moreover, it is necessary to ensure a predetermined opening in the scene where a meal or dental treatment is performed. On the other hand, it may be necessary to completely fix the mandible in the closed state. In these various situations, it is preferable that the opening restricting member is configured to be adjustable within a range in which the closed state and the required opening displacement are allowed.

  Also, the traction force required to hold the mandible in its natural state varies from person to person. For this reason, it is preferable that the opening restricting portion is configured to be able to adjust the elasticity acting on the mandible. For example, the length of the elastic member between the holding portion and the head-attached portion can be adjusted so that the acting elasticity can be changed.

  Furthermore, when the joint disk or the like existing between the mandibular head and the mandibular fossa is damaged or in the case of a mandibular fracture, it may not be preferable to always apply the elasticity. In such a case, it is preferable that the elastic member can be adjusted so that the elastic force from the elastic member does not act while preventing the displacement of the mandible only by the restricting member.

  Temporomandibular joint dislocation can be prevented, and openings that allow meals and dental treatment are allowed.

It is a side view which shows the use condition of the temporomandibular joint protector which concerns on this invention. FIG. 2 is a cross-sectional view when the temporomandibular joint protector shown in FIG. 1 is mounted in an unacceptable state. It is an expanded sectional view of the principal part in FIG. It is an expanded sectional view of the principal part in FIG. It is sectional drawing which shows the state closed by the setting which can be opened. It is sectional drawing which shows the state opened by the setting shown in FIG. It is a side view of the temporomandibular joint which shows a closed state. It is a side view of a temporomandibular joint when opening with the lower jaw head accommodated in the mandibular fossa. FIG. 6 is a side view of the temporomandibular joint showing a state of incomplete dislocation with the mandibular head disengaged from the mandibular fossa and displaced to below the joint nodule. It is sectional drawing which shows the state in which the mandible was dislocated forward. FIG. 6 is a view showing a second embodiment of the opening regulating member, showing a state in which the opening is allowed, and a cross-sectional view corresponding to FIG. 5. FIG. 12 is a cross-sectional view showing a state in which the mandible is displaced from the state shown in FIG. 11 and further displacement is restricted. It is an expanded sectional view of the principal part in FIG. It is a side view of the temporomandibular joint protector which concerns on 3rd Embodiment of this invention. It is the front of the temporomandibular joint protector which concerns on 4th Embodiment of this invention. In the temporomandibular joint protector shown in FIG. 15, it is a principal part front view which shows a closing state. In the temporomandibular joint protector shown in FIG. 15, it is a principal part front view which shows an open state. It is sectional drawing which follows the XVIII line in FIG. It is sectional drawing which follows the XI * line | wire in FIG.

  Embodiments of the present invention will be specifically described below with reference to the drawings.

  1 to 6 show a first embodiment of a temporomandibular joint protector according to the present invention. 7 to 10 schematically show the state of the temporomandibular joint.

  As shown in FIG. 1, the temporomandibular joint protector 1 according to the present embodiment is held so as to cover a head-attached portion 3 that is attached to a patient's head 2 and a patient's mental portion 25. And a pair of left and right opening restricting portions 5 that connect the head-attached portion 3 and the holding portion 4 to each other.

  As shown in FIG.1 and FIG.2, the said head covering part 3 is formed combining the strip | belt-shaped member which covers the patient's head 2. As shown in FIG. The configuration of the head-attached portion 3 is not limited to the configuration shown in the figure, and may be any one that is attached to the patient's head 2 and can support the traction force acting from the opening restricting portion 5. Various forms can be adopted. For example, it is possible to employ a head-attached portion configured in a hat shape from a net-like member.

  The holding portion 4 is formed in a bowl shape that can be attached to the chin portion 25 using a resin material, and is mounted so as to cover the tip of the chin portion 25 shown in FIG. The band-like members 6 and 6 are extended from both sides of the holding part 4, and the opening restriction part 5 is provided at the tip part. In addition, the form of the said holding | maintenance part 4 is not limited to the said form. For example, it can also be formed so as to cover the entire lower part of the mandible 20 including the mental portion.

  As shown in FIG. 2, the opening restricting portions 5, 5 in the present embodiment include first connecting members 7, 7 provided at the lower end portion of the head-attached portion 3, and the band-shaped members 6, 6. It is configured to include second connecting members 8 and 8 provided at the distal end portion, strip-shaped elastic members 9 and 9 and strip-shaped opening restricting members 10 and 10 that connect these connecting members. These members are respectively provided in the left and right opening restricting portions 5 and 5.

  The elastic member 9 is formed of a belt-like rubber string, and an upper end portion is fixed to the first connecting member 7, while a lower end portion is connected to the second connecting member 8. It is linked so that it can be adjusted. The elastic member 9 is preferably formed of a material that deforms in proportion to the force acting in a predetermined opening range.

  The opening restricting member 10 can be formed from a woven fabric or a sheet-like resin material that does not expand or contract or has an extremely small amount of expansion and contraction compared to the elastic member 9. The opening regulating member 10 has a lower end portion fixed to the second connecting member 8, and an upper end portion connected to the first connecting member 7 so that the connection position can be adjusted.

  As shown in FIG. 3, the first connecting member 7 includes a rectangular plate-like base portion 7a and a latching protrusion 12 that protrudes laterally from the outer surface of the base portion 7a. The lower end portion of the head-attached portion 3 is fixed to the inner surface of the base portion 7a. On the other hand, the upper end portion of the elastic member 9 is fixed to the lower outer surface of the base portion 7a. In the vicinity of the upper end portion of the opening restricting member 10, retaining holes 11 are provided at predetermined intervals. By engaging a predetermined latching hole 11 of the opening restricting member 10 with the latching protrusion 12 of the first connecting member 7, the holding portion 4 is regulated so as not to be displaced downward from a predetermined position. The head-attached part 3 and the holding part 4 can be connected.

  As shown in FIG. 4, the second connecting member 8 protrudes laterally from a rectangular base portion 8a, an insertion hole 8b through which the elastic member 9 can be inserted, and a lower outer surface of the base portion 8a. A latching projection 13 is provided. The upper end portion of the belt-like member 6 extending from the holding portion 4 is fixed to the inner surface of the base portion 8a. On the other hand, the lower end portion of the opening restricting member 10 is fixed to the outer surface of the portion provided with the insertion hole 8b. In the vicinity of the lower end portion of the elastic member 9, retaining holes 14 are provided at predetermined intervals. By engaging the latching protrusion 13 of the second connecting member 8 and the predetermined latching hole 14 of the elastic member 9 extending from the insertion hole 8b, the elastic member 9 has a predetermined elasticity. The head-attached part 3 and the holding part 4 can be connected in a state where a traction force is applied.

  FIG. 2 is a diagram illustrating a case where the above-described temporomandibular joint protector 1 is used in a state where the mandible in a closed state is fixedly held.

  In the state shown in FIG. 2, the elastic member 9 and the opening restricting member 10 are both held in tension. Thereby, as shown in FIG. 7, the mouth can be closed and the mandible 20 can be fixedly held at a position along the temporal bone 21. Moreover, in this state, since the opening control member 10 is tensed, the mouth cannot be opened. This can cope with the acute phase of temporomandibular joint dislocation and the case where the mouth must be held closed. Note that the elastic member 9 can be set so that an elastic traction force is generated, or can be set so as not to generate an elastic traction force, as necessary.

  As shown in FIG. 5, when the latching hole 11 in the regulating member 10 is selected and engaged with the latching projection 12 so that the opening regulating member 10 has a predetermined slack, the slack is eliminated. The downward displacement of the mandible 20 is allowed. For example, as shown in FIG. 8, the amount of slack is set in a range in which the mandibular head 22 of the mandible 20 can be rotationally displaced while being accommodated in the mandible 23 of the temporal bone 21. 22 does not move over the joint nodule 24 of the temporal bone 21, and the mandible can be displaced within a range where temporomandibular joint dislocation does not occur. It should be noted that the amount of displacement of the mandible is preferably set by the doctor or dentist within the above range in which temporomandibular joint dislocation does not occur depending on the state of the temporomandibular joint and the situation where opening is required. This makes it possible to eat and have a conversation. Moreover, in the said state, since it can open in the state which the elasticity of the said elastic member 9 acted, it also becomes possible to supplement a masticatory muscle etc. and to eat.

  When performing dental treatment or the like, an opening larger than the state shown in FIG. 8 may be required. In such a case, the amount of looseness of the opening restricting member 10 is set to be larger. As described above, complete dislocation of the temporomandibular joint is established by setting the amount of looseness of the opening restricting member 10 so that the mandibular head 22 can be opened to a position where incomplete dislocation is allowed to disengage from the mandibular fossa 23. It is possible to secure a required opening while preventing the above. Further, by setting the mandibular head 22 so as not to completely get over the joint nodules 24, it is possible to reliably prevent the complete dislocation state shown in FIG. This effectively prevents temporomandibular joint dislocation even when a large opening is required. For this reason, not only can dental treatment be performed reliably, but the sense of security of the patient or dentist who is being treated is remarkably increased.

  11 to 13 show a second embodiment of the temporomandibular joint protector according to the present invention. Note that FIGS. 11 to 13 according to the present embodiment show only a cross-sectional view in the vicinity of the opening restricting portion 205.

  The opening restricting portion 205 according to the present embodiment is connected to the first connecting member 207 connected to the lower end portion of the head-attached portion 203 and the upper end portion of the belt-like member 206 extending from a holding portion (not shown). A second connecting member 208, an elastic member 209 that connects the first connecting member 207 and the second connecting member 208, and an opening restricting member 210 are provided.

  The first connecting member 207 includes a rectangular plate-shaped base 207a, a through hole 207b through which the elastic member 209 can be inserted, and a hook-and-loop fastener 212 provided in the vicinity of the outlet of the through hole 207b. Has been.

  The lower end portion of the head-attached portion 203 is fixed to the inner surface side of the base portion 207a, and the upper end portion of the opening restriction member 210 is fixed to the outer surface side of the portion where the insertion hole 207b is provided. ing.

  The second connecting member 208 includes a rectangular plate-shaped base 208a, a through hole 208b through which the opening restricting member 210 can be inserted, and a hook-and-loop fastener 213 provided in the vicinity of the outlet of the through hole 208b. It is configured.

  The upper end portion of the belt-like member 206 and the lower end portion of the elastic member 209 are fixed to the inner surface side of the base portion 208a.

  A hook-and-loop fastener 211 that engages with the hook-and-loop fastener 212 is laminated in a predetermined range on the inner surface of the upper end portion of the elastic member 209. By engaging the hook-and-loop fastener 212 and the hook-and-loop fastener 211 at a predetermined position, the length between the first connecting member 207 and the second connecting member 208 of the elastic member 209 can be adjusted. .

  A hook-and-loop fastener 214 that engages with the hook-and-loop fastener 213 provided on the base 208a is laminated on a predetermined range on the inner surface of the lower end portion of the opening regulating member 210. By engaging the hook-and-loop fastener 213 and the hook-and-loop fastener 214 at a predetermined position, the length between the first connecting member 207 and the second connecting member 208 can be adjusted.

  As shown in FIGS. 12 and 13, the hook-and-loop fastener 212 and the hook-and-loop fastener 211, and the hook-and-loop fastener 213 and the hook-and-loop fastener 214 are inserted from the insertion holes 207 b and 208 b of the elastic member 209 and the opening restriction member 210. The engagement can be easily released by separating the extending portion to the side. Further, by pulling in a state where the engagement is released, the engaging position of the hook-and-loop fastener can be adjusted steplessly. As a result, the elastic members 209 and the opening restriction member 210 can be adjusted steplessly to easily adjust the acting elasticity and the opening restriction position of the mandible.

  FIG. 14 shows a third embodiment of the present invention. The third embodiment is configured to be able to regulate the displacement of the mandible 20 in the front-rear direction. In order to restrict the displacement of the mandible 20 in the front-rear direction, both ends are connected to the second connecting member, and a front-rear restricting member 30 is provided to be hung around the patient's neck.

  The front / rear regulating member 30 is made of a material that does not expand and contract, and can regulate the forward displacement of the mandible 20. Thereby, it is possible to reliably prevent the mandible 20 from being dislocated forward.

  Although not shown, an annular auxiliary member is provided around the neck, and a fore-and-aft regulating member made of a material capable of acting on a compressive force and a traction force is connected to the auxiliary member, whereby the mandible It is also possible to prevent longitudinal displacement (horizontal displacement). Thereby, it is possible to prevent posterior dislocation of the temporomandibular joint, and it is possible to cope with various symptoms related to the temporomandibular joint.

  15 to 19 show a fourth embodiment of the present invention.

  In the temporomandibular joint protector 401 according to the fourth embodiment, the temporomandibular joint protector 401 is attached to a predetermined part from the chin portion 25 to the bottom of the lower jaw, and a predetermined elastic force traction is applied to the lower jaw bone in a predetermined opening range of the lower jaw bone. An opening restricting portion 405 including a holding member 409 that allows a predetermined displacement, and an opening restricting member 410 that restricts the displacement of the mandible so as not to exceed a predetermined range by restricting the displacement of the holding member 409. Is provided.

  The holding member 409 is formed of a band-like member that elastically expands and contracts as a whole, and is hung around the predetermined part of the bottom of the lower jaw, the top of the head 2a and the side of the head 2c, 2c from the chin portion 25, A hook-and-loop fastener 411 provided on the top of the head 2a is configured to adjust the elasticity of pulling the lower jaw bottom upward from the mental portion 25. In addition, an auxiliary member 404 is attached to a portion of the holding member 409 that extends from the mental portion 25 to a predetermined portion of the bottom of the lower jaw and improves the fit to the mental portion 25 and adjusts elasticity. The auxiliary member 404 is also made of a material that can be elastically stretched.

  On the other hand, the opening restricting member 410 is mounted so as to overlap the belt-like member 407 wound around the top 2a and the head side 2c and 2c and the portion of the holding member 410 corresponding to the mandibular bottom from the chin portion 25. And a boat-like member 406. The boat-like member 406 is formed with a recess 406a that can accommodate a portion corresponding to the mandibular bottom from the mental portion 25. The belt-like member 407 and the boat-like member 406 are made of a material that does not elastically deform or deform, or a material that does not easily deform.

  The opening restricting member 410 is held by being overlapped with the holding member 409 so as to be relatively movable in the surface direction by an annular member 408 provided on a side portion of the holding member 409. Further, a buckle member 421 capable of adjusting the length of the opening restriction member is provided at a portion corresponding to the top of the opening restriction member 410, and the opening restriction member 410 has a shape corresponding to the shape of the patient's head. The length can be adjusted.

  As shown in FIGS. 18 and 19, the holding member 410 is integrally formed with a front / rear restricting portion 430 that extends around the back of the head, and the opening restricting portion 405 is formed by a surface fastener (not shown). While being able to position, it is comprised so that the elastic force which goes back may be made to act on the mandibular bottom part from the said mental part 25. FIG.

  In the temporomandibular joint protection diagram 401 configured as described above, when the mouth is closed, a gap 406b corresponding to the concave portion 406a of the boat-like member 406 is formed below the auxiliary member 404 as shown in FIGS. Yes.

  On the other hand, in the opened state, as shown in FIGS. 17 and 19, the mandibular bottom portion is displaced downward from the mental portion 25. Along with this, the auxiliary member 404 and the holding member 409 attached to these portions are elastically deformed to enter the concave portion 406a of the boat-like member 406, and the gap 406b disappears. As a result, a predetermined displacement is allowed while an elastic force acting in the closing direction is applied to the mandible.

  Further, the belt-like member 407 and the boat-like member 406 constituting the opening regulating member 405 are formed of a material that does not elastically deform or is not easily deformed. For this reason, the holding member 409 and the auxiliary member 404 cannot be deformed beyond the bottom surface of the boat-like member 406. Thereby, the opening displacement of the mandible is regulated so as not to exceed a predetermined range. Therefore, the same effect as the first embodiment can be exhibited.

  In the fourth embodiment, since the boat-like member 406 having the concave portion 406a is provided, it is not necessary to set a slack in the belt-like member 407 when the temporomandibular joint protector 401 is attached. For this reason, the temporomandibular joint protector 401 can be easily attached. The buckle member 421 can also set a required slack in the belt-like member 407 and adjust the displacement of the mandible.

  The scope of the present invention is not limited to the embodiment described above. The embodiment disclosed this time should be considered as illustrative in all points and not restrictive. The scope of the present invention is defined not by the above-mentioned meaning but by the scope of the claims, and is intended to include all modifications within the meaning and scope equivalent to the scope of the claims.

  It is possible to provide a temporomandibular joint protector capable of ensuring a required opening while effectively preventing temporomandibular joint dislocation.

1 Temporomandibular joint protector 2 Head (patient)
2a head top 2c side head 3 head part 4 holding part 5 opening restricting part 6 strip member 7 first connecting member 7a base 8 second connecting member 8a base 8b insertion hole 9 elastic member 10 opening restricting member DESCRIPTION OF SYMBOLS 11 Latching hole 12 Latching protrusion 13 Latching protrusion 14 Latching hole 20 Mandibular bone 21 Temporal bone 22 Mandibular head 23 Mandibular fossa 24 Joint nodule 25 Gentoid part 203 Head covering part 205 Opening restriction part 206 Band-shaped member 207 1st Connecting member 207a base portion 207b insertion hole 208 second connecting member 208a base portion 208b insertion hole 209 elastic member 210 regulating member 211 surface fastener 212 surface fastener 213 surface fastener 214 surface fastener 401 temporomandibular joint protector 404 auxiliary member 405 opening restriction Part 405
406 Boat-like member 406a Recess 406b Gap 407 Strip member 408 Annular member 409 Holding member 410 Opening restricting member 411 Hook fastener 430 Front-rear restricting portion

Claims (13)

A temporomandibular joint protector that can prevent dislocation of the temporomandibular joint,
A head-attached portion that is attached to the head;
It has an opening restricting part that causes traction to act on the mandible via a predetermined part of the mandibular base from the mental part,
In the predetermined opening range of the mandible, the opening restricting portion can elastically bias the mandibular head of the mandible toward the mandibular fossa of the temporal region,
A temporomandibular joint protector for restricting the opening displacement of the mandible so as not to exceed a predetermined range. A holding part that is attached to a predetermined part of the mandibular base from the mental part and that exerts a traction force on the mandible,
The temporomandibular joint protector according to claim 1, wherein the opening restricting portion is configured to connect the head-attached portion and the holding portion to apply a traction force. The opening restricting portion is an elastic member that acts elastically while allowing displacement of the mandible,
The temporomandibular joint protector according to claim 1 or 2, comprising an opening restricting member that restricts the displacement of the mandible so as not to exceed a predetermined range.   The temporomandibular joint protector according to claim 3, wherein the opening restricting portion includes the belt-like elastic member and the belt-like opening restricting member. The opening restricting portion is attached to a predetermined portion of the mandibular base portion from the mental portion, and allows a predetermined opening displacement while applying a predetermined elastic force to the mandible in a predetermined opening range of the mandible. A holding member;
2. An opening restricting member configured to restrict the displacement of the holding member corresponding to the opening displacement of the mandible and restrict the opening displacement of the mandible so as not to exceed a predetermined range. The temporomandibular joint protector as described.   The temporomandibular joint protector according to claim 5, wherein the opening restricting member includes a concave portion that allows the displacement of the holding member. The holding member is configured to include an elastic member that acts elastically while allowing displacement of the mandible,
The temporomandibular joint protector according to claim 5 or 6, wherein the opening restricting member is formed of a material that does not elastically expand or contract or is difficult to deform.   The temporomandibular joint protector according to any one of claims 5 to 7, wherein the holding member and the regulating member are formed to include a band-shaped member.   The temporomandibular joint protector according to any one of claims 1 to 8, wherein the opening restricting portion is configured to be able to adjust a displaceable range of the mandible.   The opening restriction unit is configured to be able to restrict displacement of the mandible within a range in which the mandibular head does not get over the joint nodules of the temporal bone. The temporomandibular joint protector according to 1.   The said opening restriction | limiting part is comprised so that the displacement of the said mandible can be regulated in the range which can ensure the opening amount required in order to perform a dental treatment, In any one of Claims 1-10. The temporomandibular joint protector as described.   The temporomandibular joint protector according to any one of claims 1 to 11, wherein the opening restricting portion is configured to be able to adjust elasticity acting on the mandible.   A dental treatment instrument comprising the temporomandibular joint protector according to any one of claims 1 to 12.

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