JP2005342133A - Mouth guard - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a mouth guard which does not obstruct breathing when it is worn, and also, can effectively prevent the dryness in the oral cavity from occurring, and at the same time, can be naturally be worn without a feeling of incongruity at the time of use. <P>SOLUTION: This mouth guard is equipped with a front tooth covering section 10 and a molar covering section 20. The front tooth covering section 10 covers the front surfaces and the rear surfaces of the front teeth on both of the right and left sides of the upper jaw, and the front surface and the rear surface of the gum of the front teeth section under a closely joined state. The molar covering section 20 covers the front surface, the lower surface and the rear surface of the molars on both of the right and left sides of the upper jaw, and the front surface and the rear surface of the gum of the molar sections under a closely joined state. The front tooth covering section 10 and parts other than the parts matching the occlusion surfaces of the first molars in the molar covering section 20 are formed into a perforated wall for which a plurality of pores 31 and 32 are formed by penetrating in the thickness direction over the approximately total surface. The parts matching the occlusion surfaces of the first molars in the molar covering section 20 is formed into a non-pore wall on which no pores are formed. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a mouth guard that is worn on the upper teeth when exercising or the like, and more particularly to a mouth guard that can be used comfortably without any discomfort during wearing and without disturbing breathing. The mouth guard according to the present invention is suitable for, for example, each use of exercise (contact sports) involving physical contact such as martial arts and rugby and non-contact exercise (non-contact sports) not involving physical contact such as baseball and cycling. Can be used.

  Conventionally, a mouth guard (also called a mouthpiece or a mouth protector) used in boxing or the like as a sports protection device or an oral protection device for preventing trauma in the mouth during sports and protecting teeth and jaw bones It has been known. In general, the purpose of wearing a mouth guard for sports is to protect the teeth and periodontal tissues (especially the maxillary anterior teeth) from the external force directly applied to the face from the front and side, and by the teeth on the lips, tongue and cheeks by external force Prevents damage, protects teeth, periodontal tissue, prosthesis, etc. from impact due to contact with the upper jaw when external force is applied to the lower jaw, protects the temporomandibular joint (joint cavity, joint disc, etc.) from external force It is intended to protect or prevent damage to the brain such as concussion due to impact on the brain via the temporomandibular joint and dentition.

  Here, by using an elastic material having excellent flexibility as a material, the mouth guard can exert effects such as the prevention of trauma in the jaw and palate and the impact absorption / relaxation to the brain as described above. become. That is, by mounting the mouth guard, the external force is diffused throughout the mouth guard, and the concentration of impact can be suppressed.

By the way, in recent years, the mandatory use of mouth guards has been encouraged mainly in contact sports (boxing, rugby, American football, etc.), and the number of mouth guard users has increased mainly in athletes. Has been prevented in advance. However, some people who have used mouth guards point out problems such as discomfort during wearing, difficulty in nausea conversation, thirst in the mouth, difficulty in breathing, rather than the superior protective action and effects of wearing the mouth guard. It is also true that there are many people who cannot withstand these problems and often stop wearing their mouth guards. Therefore, as a technique for solving such a problem, for example, there is a technique described in Patent Document 1.
JP-A-10-201772

  Patent Document 1 discloses a mouth guard that reduces a sense of discomfort and nausea when the mouth guard is worn and does not interfere with pronunciation. The mouth guard is attached to the teeth and gums of the upper jaw, and a recess is formed in the portion where the upper end of the lower molar is in contact with which the upper end of at least one molar of the lower jaw can be easily positioned. The mouth guard has teeth and gums on the side of the lip or cheek facing the lips or cheeks, except for a portion that moves from the gingiva to the lips or cheek (gum lip (cheek) transition portion) and a movable range of the small band. By forming so as to cover, it is suitable for contact sports. Furthermore, this mouth guard is made suitable for non-contact sports by extending the labial and cheek side portions facing the lips or cheeks to the cervical region (boundary portion between the teeth and gums).

  However, with the technique described in Patent Document 1, there is no description or suggestion about a means for solving problems such as difficulty in breathing and thirst in the mouth when the mouth guard is worn, and these problems cannot be dealt with. Further, while solving the above problems, it is important to improve the adhesion when the mouth guard is worn. However, the technique disclosed in Patent Document 1 is a solution for improving the adhesion when the mouth guard is worn. There is no description or suggestion, and we cannot deal with these problems.

  In addition, as an advantage of wearing a mouth guard, it has been pointed out that the concentration of the molars (back teeth) is improved, the competition power (physical power) is improved, and the back teeth are prevented from being worn. A considerable force is applied from the teeth to the occlusal surface (particularly the cusp portion). for that reason,

  Accordingly, the present invention provides a mouth guard that does not interfere with breathing when worn, can effectively prevent thirst in the oral cavity, and can be naturally worn without feeling uncomfortable during use. The issue is to provide

  The mouth guard according to claim 1 is in the form of a sheet covering all the teeth of the upper jaw in close contact with each other, and a large number of small holes are formed through substantially the entire surface thereof.

  The mouth guard according to claim 2 includes an anterior tooth covering portion that closely covers the front and rear surfaces of the front teeth on the left and right sides of the upper jaw and the front and rear surfaces of the gingiva of the front teeth portion; A molar covering portion that covers the posterior surface and the gingival front surface and the posterior surface of the molar portion in close contact with each other, and the front tooth covering portion and the portion other than the portion corresponding to the occlusal surface of the first molar in the molar covering portion, A plurality of small holes are perforated and formed in the thickness direction over substantially the entire surface, and the portion corresponding to the occlusal surface of the first molar in the molar covering portion forms the small holes at all. Not perforated walls.

  According to a third aspect of the present invention, there is provided the mouth guard according to the second aspect, wherein the small hole of the perforated wall is provided in a portion corresponding to a cutting edge of each incisor of the front tooth covering portion, and the front tooth covering. Corresponding to the cusps of each canine of the part, the substantially circular hole provided in the part corresponding to each cusp of each molar other than the first molar of the molar covering part, and the gingiva of the anterior tooth covering part and the molar covering part It consists of a large number of substantially circular holes provided at a substantially uniform arrangement density on substantially the entire surface of the portion to be formed.

  The mouth guard according to claim 4 connects the pair of left and right covering parts covering the front, bottom and rear surfaces of the canine and molar teeth on both the left and right sides of the upper jaw in close contact with the pair of left and right covering parts, A connecting portion that is substantially in contact with or close to the rear surface of the incisor on both the left and right sides of the upper jaw when attached to the canine and molar teeth, and substantially the entire portion corresponding to the incision edge and the front surface of the incisor. It opens and it is set as an open part, and the distribution | circulation of saliva and air is permitted in the front-back direction of the said incisor.

  The mouth guard according to claim 5 includes a pair of left and right covering portions that cover the front, lower and rear surfaces of the molars on both left and right sides of the upper jaw and the front and rear surfaces of the gingiva of the molar portion in close contact, and the pair of left and right covering portions. And connecting with the connecting portion that is in a state of being substantially in contact with or close to the hard palate of the upper jaw in a state in which the covering portion is attached to the molar tooth, and opening substantially the entire portion corresponding to the incisor and the canine, The circulation of saliva and air is allowed in the longitudinal direction of the incisors and canines.

  Since the mouth guard according to the first aspect is configured as described above, the mouth guard is mounted in close contact along all teeth (dentition) of the upper jaw and can be protected by covering all the teeth. At this time, since a large number of small holes are formed over substantially the entire surface of the mouth guard, saliva, exhaled air or inhalation in the oral cavity is caused by the rear surface (back surface) and front surface (front surface) of the teeth through the small holes of the mouth guard. That is, it passes smoothly between the front part and the rear part of the dentition of the oral cavity. Therefore, even when the mouth guard is worn, thirst in the oral cavity especially when mouth breathing can be effectively suppressed, and mouth breathing is not hindered. As a result, it is possible to remarkably reduce the sense of discomfort and foreign matter in the mouth when using the mouth guard, and to ensure smooth mouth breathing of the user. That is, according to the mouth guard according to claim 1, the breathing at the time of wearing is not hindered, the thirst in the oral cavity can be effectively prevented, and there is no sense of incongruity at the time of use. Can be installed. Furthermore, according to the mouth guard according to claim 1, the saliva smoothly passing from the rear surface of the tooth to the front surface is distributed over the entire contact surface between the mouth guard and the tooth (and gingiva), and the mouth guard and the dentition. Adhesive function with (and gingiva). As a result, the adhesion between the mouth guard and the dentition is remarkably improved, and it is possible to reliably prevent the unexpected dropout when the mouth guard is attached.

  Since the mouth guard according to claim 2 is configured as described above, the front tooth covering portion and the molar tooth covering portion are mounted in close contact with the front teeth and molar teeth of the upper jaw and the gingiva, and cover and protect those teeth and gingiva. can do. At this time, a plurality of small holes are formed penetratingly in the thickness direction over substantially the entire surface of the mouth guard anterior tooth covering portion and the portion other than the portion corresponding to the occlusal surface of the first molar in the molar covering portion. , Saliva, exhalation or inhalation in the oral cavity is between the posterior surface (back surface) and the front surface (front surface) of the tooth through the small hole of the mouth guard, that is, between the front portion and the rear portion of the oral dentition. To pass smoothly. Therefore, even when the mouth guard is worn, thirst in the oral cavity especially when mouth breathing can be effectively suppressed, and mouth breathing is not hindered. As a result, it is possible to remarkably reduce the sense of discomfort and foreign matter in the mouth when using the mouth guard, and to ensure smooth mouth breathing of the user. That is, according to the mouth guard according to claim 2, the breathing at the time of wearing is not hindered, thirst in the oral cavity can be effectively prevented, and there is no sense of incongruity at the time of use. Can be installed. Furthermore, according to the mouth guard according to claim 2, the saliva that smoothly passes from the rear surface of the tooth to the front surface through a small hole or the like, the inner surface of the front tooth coating portion, the inner surface of the molar coating portion, and the outer surface of the tooth (and gingiva) It spreads over the entire contact surface, and exhibits an adhesive-like function between the front tooth covering part and the molar tooth covering part and the dentition (and gingiva). As a result, the adhesion between the mouth guard and the dentition is remarkably improved, and it is possible to reliably prevent the unexpected dropout when the mouth guard is attached. Furthermore, the mouth guard according to claim 2 generally has a small hole at the portion corresponding to the occlusal surface in the first molar where the occlusal surface is always in direct contact during occlusion and a large occlusal force is applied. Because it is a non-perforated wall, it is possible to reliably prevent the mouth guard from being damaged by an external force from the occlusal surface of the first molar and causing a crack or the like from the molar portion (non-porous wall) of the mouth guard. be able to. That is, the mouth guard according to the second embodiment has the same effect as that of the first claim, and the strength at the time of use of the mouth guard, particularly in the first molar portion (non-porous wall) that is highly likely to be damaged. It is improved, and it is possible to reliably prevent damage during use and to prolong the product life.

  Since the mouth guard according to claim 3 is configured as described above, in addition to the operation and effect of claim 2, the mouth guard further corresponds to the incision edge (tooth tip) of each incisor of the front tooth covering portion in the perforated wall. By inserting the cutting edge portion of the incisor into the long hole provided in the portion, the mounting position does not deviate from the normal position even when an external force is unexpectedly received. Further, in the perforated wall, by inserting the cuspid portion of the canine and the cusp portion of the molar tooth into the substantially circular hole provided in the cusp of the canine and the molar cover of the anterior tooth covering portion, the effect of preventing the displacement due to the long hole In the same manner as described above, the effect of preventing displacement can be more reliably exhibited. As a result, the mouth guard can be securely fixed at a predetermined position of the dentition in the oral cavity, and the effect of the mouth guard can be maximized. Further, when uttering a plosive or the like, the incisor of the upper jaw and the incisor of the lower jaw are engaged with each other, but the mouth guard according to claim 3 penetrates the elongated hole at the incisor portion of the upper jaw, Since the air can be passed through, it is possible to easily produce a sound (plosive sound or the like) that extrudes air from between the upper incisor and the lower incisor. In the mouth guard according to claim 3, the small holes of the perforated wall are formed on the incisal edge and the canine and molar cusps, but as described above, the occlusal surface is always directly at the time of occlusion. In general, only the first molars are in contact with each other, and the occlusal surfaces of the other teeth are not in direct contact with each other, so that a problem such as breakage of the mouth guard from those small holes does not occur.

  Since the mouth guard according to claim 4 is configured as described above, the pair of left and right covering portions are mounted in close contact along the canine and molar teeth on the left and right sides of the upper jaw, and can cover and protect those teeth. it can. At this time, the connecting part connects and integrates the pair of left and right covering parts, and is substantially in contact with or close to the rear surfaces of the incisors on the left and right sides of the upper jaw. Can be accurately positioned at a predetermined position along the line, and can be reliably prevented from being displaced after mounting. In addition, the mouth guard according to claim 4 can be suitably used as a mouth guard for non-contact sports, in particular, because it opens the front surface of the incisor portion. In the connecting part between the parts, substantially the whole of the part corresponding to the cutting edge and the front surface of the incisor is opened to be an open part, and the circulation of saliva and air is allowed in the front-rear direction of the incisor. Therefore, saliva, exhaled air or inhalation in the oral cavity is between the rear surface (back surface) and the front surface (front surface) of the tooth at the incisor portion through the mouth guard opening, that is, the front portion and the rear portion of the oral dentition. Passes smoothly between the side parts. Therefore, even when the mouth guard is worn, thirst in the oral cavity especially when mouth breathing can be effectively suppressed, and mouth breathing is not hindered. As a result, it is possible to remarkably reduce the sense of discomfort and foreign matter in the mouth when using the mouth guard, and to ensure smooth mouth breathing of the user. That is, according to the mouth guard according to claim 4, the breathing at the time of wearing is not hindered, the thirst in the oral cavity can be effectively prevented, and there is no sense of incongruity at the time of use. Can be installed. Further, according to the mouth guard according to claim 4, the saliva smoothly passing from the rear surface to the front surface of the tooth in the connecting portion is also a contact surface between the inner surface of the covering portion and the outer surface of the tooth in the left and right covering portions. It spreads throughout and exhibits an adhesive function between the covering and the teeth. As a result, the adhesion between the mouth guard and the dentition (canine teeth and molars) is remarkably improved, and it is possible to reliably prevent an unexpected dropout when the mouth guard is attached. In addition, by providing a connecting portion between the left and right covering portions, it is possible to distribute the occlusal force transmitted to the covering portion over the entire mouth guard. In addition, the mouth guard connecting portion is arranged on the tongue side of the palate, that is, on the rear side (back side) of the dentition, and the incisor portion is opened by the opening portion. It is difficult to understand that the wearer is wearing, and the appearance when worn can be improved. Further, in the case of vocalization such as a plosive sound, the incisor of the upper jaw and the incisor of the lower jaw are engaged with each other, but the mouth guard according to claim 4 has the incisor portion of the upper jaw opened by the open portion, and from the open portion. Since air can be allowed to pass therethrough, an excellent effect is obtained that it is easy to generate a sound (plosive sound or the like) that pushes air from between the upper incisor and the lower incisor. Moreover, since the mouth guard which concerns on Claim 4 has open | released the incisor by the open part, there is little uncomfortable feeling at the time of mounting | wearing.

  Since the mouth guard according to claim 5 is configured as described above, the pair of left and right covering portions are mounted in close contact with the molars and gums on both the left and right sides of the upper jaw and covers and protects the teeth and gums. be able to. At this time, the connecting part connects and integrates the pair of left and right covering parts, and is substantially in contact with or close to the hard palate of the upper jaw, so that the mouth guard is positioned at a predetermined position along the dentition in the oral cavity. Can be accurately positioned, and can be reliably prevented from being displaced after mounting. Further, the mouth guard according to claim 5 can be suitably used as a mouth guard for non-contact sports, in particular, since it substantially opens the entire portion corresponding to the incisors and canines. In the connection part between the pair of left and right covering parts of the guard, the flow of saliva and air is allowed in the front-rear direction of the incisor and canine by the opening provided in substantially the entire portion corresponding to the incisor and canine. . Therefore, saliva, exhaled air or inhalation in the oral cavity passes between the rear surface (back surface) and the front surface (front surface) of the tooth at the incisor portion through the mouth guard opening, that is, the front portion and the rear portion of the oral cavity. Passes smoothly between the side parts. Therefore, even when the mouth guard is worn, thirst in the oral cavity especially when mouth breathing can be effectively suppressed, and mouth breathing is not hindered. As a result, it is possible to remarkably reduce the sense of discomfort and foreign matter in the mouth when using the mouth guard, and to ensure smooth mouth breathing of the user. That is, according to the mouth guard according to claim 5, the breathing at the time of wearing is not hindered, the thirst in the oral cavity can be effectively prevented, and there is no sense of incongruity at the time of use. Can be installed. Furthermore, according to the mouth guard according to the fifth aspect, the saliva that smoothly passes from the rear surface to the front surface of the tooth in the connecting portion is also between the inner surface of the covering portion, the outer surface of the tooth, and the outer surface of the gingiva in the left and right covering portions. It spreads over the entire contact surface and exhibits an adhesive function between the covering portion and the teeth and gums. As a result, the adhesion between the mouth guard and the dentition (molar teeth) and gingiva is remarkably improved, and it is possible to reliably prevent the unexpected dropout when the mouth guard is attached. In addition, by providing a connecting portion between the left and right covering portions, it is possible to distribute the occlusal force transmitted to the covering portion over the entire mouth guard. Furthermore, the connecting part of the mouth guard is arranged on the lingual side of the palate, that is, the rear side (back side) of the dentition, and the part corresponding to the incisor and the canine is opened by the opening part. It is difficult to recognize that the mouth guard is worn, and the appearance when worn can be improved. Further, in the case of vocalization such as a plosive sound, the incisor of the upper jaw and the incisor of the lower jaw are engaged with each other, but the mouth guard according to claim 4 has the incisor portion of the upper jaw opened by the open portion, and from the open portion. Since air can be allowed to pass therethrough, an excellent effect is obtained that it is easy to generate a sound (plosive sound or the like) that pushes air from between the upper incisor and the lower incisor. Moreover, since the mouth guard which concerns on Claim 4 has open | released the incisor and the canine tooth by the open part, there is little discomfort at the time of mounting | wearing.

  Hereinafter, the best mode for carrying out the present invention (hereinafter referred to as an embodiment) will be described. Throughout each embodiment, the same members, elements, or parts are denoted by the same reference numerals, and the description thereof is omitted.

Embodiment 1
FIG. 1 is a plan view of a mouth guard according to Embodiment 1 of the present invention. FIG. 2 is a perspective view of the mouth guard according to Embodiment 1 of the present invention.

  As shown in FIGS. 1 and 2, the mouth guard according to the first embodiment has a sheet shape that covers all the teeth of the upper jaw in a close state, and has a large number of small holes penetrating the entire surface. . The mouth guard according to the first embodiment is embodied as a custom-made (custom-made) mouth guard. Specifically, the mouth guard integrally molds the anterior tooth covering portion 10 and the molar tooth covering portion 20 into a sheet shape corresponding to the upper teeth and molar teeth and the gingival shapes thereof, These gingival outer surfaces are covered closely. The mouth guard according to the first embodiment is used through various steps such as tooth shape collection (by plaster etc.), tooth shape transfer, preforming, finishing, etc. for each tooth shape and gingival shape of the user of the mouth guard. FIG. 1 and FIG. 2 show an example of a sheet shape (tooth shape or the like). Specifically, the front tooth covering portion 10 includes a concave-shaped front tooth corresponding portion 11 having the same inner surface shape as the outer surface shape of the left and right front teeth (incisors and canines), and both front and rear sides of the front tooth corresponding portion 11. And an anterior gingival corresponding portion 12 having the same inner surface shape as the outer surface shape of the gingiva of the front tooth portion, and from the front surface (front surface) to the rear surface (back surface) of the front tooth portion of the gingiva of the front tooth portion It forms a sheet that covers the front and rear surfaces in close contact. That is, the front tooth corresponding portion 11 of the front tooth covering portion 10 has a concave sheet shape corresponding to the dentition of the front tooth portion composed of a pair of left and right central incisors, a pair of left and right side incisors and a pair of left and right canines. The inner surface shape is the same as the outer surface shape of the dentition portion composed of the central incisor, side incisor and canine. Moreover, the inner surface shape of the front gingival corresponding part 12 is substantially the same shape as the outer surface shape of the gingival portions of the central incisor, side incisor and canine.

  On the other hand, the molar covering part 20 has a concave-shaped molar corresponding part 21 having an inner surface shape identical to the outer surface shape of the molars (first and second premolars and first and second molars) on both the left and right sides of the upper jaw, It has a molar gingival corresponding portion 22 which is integrally provided on both the front and rear sides of the molar corresponding portion 21 and has the same inner surface shape as the outer surface shape of the gingiva of the molar portion, and the rear surface from the front surface (front surface) of the molar tooth through the bottom surface It forms a sheet that covers up to the (back surface) and the front and back surfaces of the gums of the molar portion in close contact. That is, the molar corresponding part 21 of the molar covering part 20 is a front surface (front surface), a lower surface (bottom surface), and a rear surface (back surface) of the molars (first and second premolars and first and second molars) on both the left and right sides of the upper jaw. ), And the inner surface shape is the same as the outer surface shape of the dentition portion composed of the first and second premolars and the first and second molars. It has become. Moreover, the inner surface shape of the molar gum corresponding part 22 is substantially the same shape as the outer surface shape of the gingival portions of the first and second premolars and the first and second molars. In addition, when the user of the mouth guard has the third molar, the molar covering part 20 of the mouth guard has a sheet shape that covers the first molar to the third molar and the gingival part in close contact with each other. . Further, in the molar covering portion 20, the innermost portion, that is, the portion corresponding to the posterior surface of the gingiva of the second molar portion (or the third molar portion) can be almost omitted.

  A portion (side wall portion) other than the portion (bottom wall portion) corresponding to the occlusal surface (surface surrounded by the cusp) of the first molar tooth and the second molar tooth in the front tooth covering portion 10 and the molar covering portion 20 A plurality of small holes 31 and 32 are perforated walls that are formed to penetrate in the thickness direction over substantially the entire surface. Further, a portion (bottom wall portion) corresponding to the occlusal surfaces of the first molar and the second molar in the molar covering portion 20 is a non-porous wall that does not form the small holes 31 and 32 at all. That is, a large number of small holes 31 are formed in the entire front tooth corresponding part 11 and front tooth gingival corresponding part 12 so as to penetrate in the thickness direction with a substantially constant arrangement density. In addition, a large number of small holes 31 are formed in the entire molar / gingival corresponding portion 22 so as to penetrate in the thickness direction with a substantially constant arrangement density. Furthermore, portions other than the bottom wall (bottom surface) 21a serving as the occlusal surfaces of the first molar and the second molar in the molar corresponding portion 21, that is, the bottom wall corresponding to the first premolar and the second premolar, and A large number of small holes 31 are formed in the side wall and the side wall 21b corresponding to the first molar and the second molar so as to penetrate in the thickness direction at a substantially constant arrangement density. On the other hand, the small hole 31 is not formed at all in the bottom wall (bottom surface) 21a which is the occlusal surface of the first molar and the second molar in the molar corresponding portion 21, and the bottom wall 21a is a small hole. It is formed in a simple sheet shape having no openings such as 31, 32. Here, in the mouth guard according to the first embodiment, the bottom wall 21a of the portion corresponding to the first molar and the second molar in the molar corresponding portion 21 is a non-porous wall. However, since generally only the upper and lower first molars are in direct contact during occlusion, the bottom wall 21a of the portion corresponding to only the first molar in the molar corresponding portion 21 is a non-porous wall, and the second A small hole 31 may be formed in the bottom wall 21a of the portion corresponding to the two molars to form a perforated wall.

Next, the small holes 31 and 32 will be described in detail.
The small holes 31 and 32 of the perforated wall are respectively formed in a long hole 32 provided in a portion corresponding to the cutting edge of each incisor of the front tooth covering portion 10 and a bottom wall of the front tooth corresponding portion 11 of the front tooth covering portion 10. In the substantially circular hole 31 provided in the cusp of the canine and the molar corresponding part 21 of the molar covering part 20, provided in the part corresponding to each cusp of the first and second premolars excluding the first and second molars. It consists of a substantially circular hole 31 and a number of substantially circular holes 31 provided with a substantially uniform arrangement density on substantially the entire surface of the part corresponding to the gingiva of the front tooth covering part 10 and the molar tooth covering part 20. That is, the front tooth corresponding portion 11 is provided with a total of four long holes 32 corresponding to the cutting edges of the pair of right and left (two) medium incisors and the cutting edge of the pair of left and right (two) side incisors. At the same time, a total of two substantially circular holes 31 are formed so as to correspond to the (one) cusp of a pair of left and right (two) canines. In addition, since each premolar usually has two cusps, in the molar corresponding part 21, the left and right (two) first premolar (two each) cusp and the left and right pair (two) A total of eight substantially circular holes 31 are formed penetratingly corresponding to (two each) cusps of the second premolars. In addition, small holes, such as the substantially circular hole 31 and the long hole 32, are not formed in the other part (side wall) of the front tooth corresponding part 11 and the molar corresponding part 21. On the other hand, a large number of substantially circular holes 31 are formed through the front gingival corresponding part 12 and the molar gingival corresponding part 22 with a substantially uniform arrangement density throughout. In the first embodiment, a small hole such as a substantially circular hole 31 can also be formed through the side wall portion of the front tooth corresponding portion 11 and the side wall 21b portion of the molar corresponding portion, but from the viewpoint of shock absorption, etc. As illustrated, it is preferable to provide a small hole only in the bottom wall portion. Further, the shape of the small hole may be a shape other than the substantially circular hole 31 or the long hole 32.

  Further, in the mouth guard of the first embodiment, in the molar corresponding part 21, the bottom wall 21a corresponding to the first molar and the second molar (at least the first molar) is a non-porous wall. Although it is preferable from the viewpoint of preventing breakage, a substantially circular hole 31 can be provided in the bottom wall 21a corresponding to the first molar and the second molar (at least the second molar). In this case, since each molar has usually 3 to 5 cusps, a substantially circular hole 31 can be provided at a position corresponding to each cusp. However, also in this case, in the bottom wall 21a of the gingival corresponding portion 21, a substantially circular hole 31 or a small hole having another shape can be provided at a position other than the position corresponding to each cusp of the molar tooth.

  The mouth guard according to the first embodiment can be integrally formed with the entire shape by the same molding as the conventional one using the same sheet material as the conventional mouth guard. As such a sheet material, there is a thermoplastic resin sheet such as a vinyl acetate-based thermoplastic resin, among which a polyethylene vinyl acetate (EVA) sheet can be preferably used. Polyethylene vinyl acetate sheet is excellent in various characteristics such as safety to human body, low temperature characteristics, flexibility, toughness, and transparency, so it has high safety, high strength, long life, good moldability and wearing. It is very preferable in that it can provide mouth guards with a wide variety of designs that exhibit high performance and improved appearance. As another material for the mouth guard, a thermoplastic elastomer (TPE) sheet may be used from the viewpoint of durability and the like. Further, as the thermoplastic resin sheet, a multilayer sheet or a laminate sheet may be used in addition to a single layer sheet. Furthermore, the thickness of the thermoplastic resin sheet can be increased or decreased depending on the purpose of use. For example, for contact sports such as boxing, the wall thickness is increased to increase shock absorption, while for non-contact sports such as cycling, the wall thickness is decreased to improve breathing acceleration. .

Manufacturing Method Next, a manufacturing method of the mouth guard according to the first embodiment will be described.
First, specialists such as dentists and dental technicians use plastic materials to collect the upper and lower dentition (and gingival) shapes of the user, and create a concave mold for creating the dental mold (impression acquisition process) ). Next, gypsum or the like is poured into the created concave mold and cured to create a tooth mold (tooth mold creating process). Next, a thermoplastic resin sheet is placed on the tooth mold, the thermoplastic resin sheet is heated and softened, and then the tooth mold is pressed and / or vacuum-sucked to form the thermoplastic resin sheet. Transfer to a sheet (teeth mold transfer process). Next, the thermoplastic resin sheet to which the tooth mold is transferred is gradually cooled and cured to obtain a sheet-shaped preform corresponding to the user's tooth mold. At this time, recessed portions corresponding to the front tooth corresponding portion 11 and the molar corresponding portion 21 are formed in the preform. Thereafter, unnecessary portions of the hardened preform are excised by polishing or the like to obtain end face shapes corresponding to the anterior gingival corresponding portion 12 and the molar gingival corresponding portion 22 (excision process). At this time, the preform does not have the small holes 31 and 32, but has the same shape as the mouth guard according to the first embodiment. Next, a substantially circular hole 31 or a long hole 32 is formed through a predetermined position of the perforated wall portion of the preform (small hole forming step). Finally, the occlusion is adjusted appropriately according to the user, and the process is completed. Create a mouth guard as a product. The mouth guard manufactured by the manufacturing method of the first embodiment is manufactured by heating, softening, etc., the thermoplastic resin sheet, so that it has excellent compatibility with the shape of dentition and gingiva in each individual oral cavity. The discomfort at the time of wearing can be greatly reduced. In addition, since the mouth guard according to the first embodiment is manufactured for each user, the degree of freedom in design is high, and it is possible to flexibly respond to the user's desires and requirements, for example, colors, patterns, etc. It becomes possible to improve the designability. Furthermore, the manufacturing method of the mouth guard according to the first embodiment is effective for temporomandibular disorders and bruxism (bite bruise such as bruxism) because correct engagement and jaw position adjustment are possible. it can.

How to use To attach the mouth guard according to the first embodiment, first attach the center portion (incision portion) of the front tooth covering portion 10 to the incisor, and then sequentially install the portion on the back side ( The inspection portion) and the molar cover 20 are attached to the molar. As a result, the upper dentition (all teeth from the incisor to the molar) and the gingiva of the user are covered and protected by the front guard covering part 10 and the molar covering part 20 of the mouth guard in close contact. On the other hand, in order to remove the mouth guard according to the first embodiment, the opposite molar covering portions 20 are removed from the molar teeth, and then the central front tooth covering portion 10 is removed from the canines and incisors.

  Incidentally, as described above, the mouth guard according to the first embodiment is configured to cover all the teeth and gums along the shape of the dentition and gums from the molar teeth to the incisors. A space between the pair of left and right front gingival corresponding portions 11 is a notch corresponding to the small band of the gingival portion on the labial cheek side. Moreover, it is preferable that the substantially circular hole 31 as a large number of small holes penetratingly formed over substantially the entire surface of the mouth guard has a hole diameter in the range of about 0.5 to 2 mm. As the hole diameter of the substantially circular hole 31 is smaller than about 0.5 mm, the breathing performance, inhalation, or saliva passage performance by the substantially circular hole 31 may be reduced. On the other hand, as the hole diameter of the substantially circular hole 31 exceeds about 2 mm, the strength and durability of the mouth guard as a whole may decrease. Moreover, when the hole diameter of the substantially circular hole 31 of the mouth guard is within the above range, the approximately circular hole 31 is preferably provided in a range of about 2 to 10 per square centimeter. If the number of the substantially circular holes 31 is less than 2 / cm 2, the performance of exhalation, inspiration, or saliva passing through the approximately circular holes 31 may be deteriorated. On the other hand, if the number of substantially circular holes 31 exceeds 10 / cm 2, the strength and durability of the mouth guard as a whole may be reduced. In addition, it is preferable to adjust suitably the hole diameter and arrangement | positioning density of the substantially circular hole 31 according to conditions, such as an individual's saliva secretion amount and the aspect of respiration. Further, at least the small cusp of the first molar is not provided with a small hole.

Effect The mouth guard according to the first embodiment is mounted in close contact along all teeth (dentition) of the upper jaw and can cover and protect all teeth. That is, in the mouth guard according to the first embodiment, the front tooth covering portion 10 and the molar tooth covering portion 20 are mounted in close contact with the front teeth and molar teeth of the upper jaw and the gingiva, and cover and protect those teeth and gingiva. Can do. At this time, a large number of small holes 31 and 32 are formed over substantially the entire surface of the mouth guard. That is, a plurality of small holes 31 and 32 penetrate in the thickness direction over substantially the entire surface of the mouth guard front tooth covering portion 10 and the portion other than the portion corresponding to the occlusal surface of the first molar in the molar covering portion 20. In order to form, many small holes 31 and 32 are formed. Therefore, saliva, exhaled air or inhalation in the oral cavity is between the rear surface (back surface) and the front surface (front surface) of the tooth through the small holes 31 and 32 of the mouth guard, that is, the front portion and the rear side of the oral dentition. Pass smoothly between the parts. Therefore, even when the mouth guard is worn, thirst in the oral cavity especially when mouth breathing can be effectively suppressed, and mouth breathing is not hindered. As a result, it is possible to remarkably reduce the sense of discomfort and foreign matter in the mouth when using the mouth guard, and to ensure smooth mouth breathing of the user. That is, according to the mouth guard according to the first embodiment, breathing at the time of wearing is not hindered, thirst in the oral cavity can be effectively prevented, and there is no sense of incongruity during use. Can be attached to. Furthermore, according to the mouth guard according to the first embodiment, the saliva that smoothly passes from the rear surface of the tooth to the front surface spreads over the entire contact surface between the mouth guard and the tooth (and gums). Adhesive function between rows (and gingiva). As a result, the adhesion between the mouth guard and the dentition is remarkably improved, and it is possible to reliably prevent the unexpected dropout when the mouth guard is attached.

  When the mouth guard according to the first embodiment is embodied as a mouth guard for contact sports, an external force by striking or the like is applied to the jaw bone or the periphery of the oral cavity (mandibular oral region) in a state where the mouth guard is mounted on the maxillary dentition. In this case, a part of the external force is absorbed by the mouth guard existing between the upper and lower dentitions, and the remaining energy is dispersed throughout. Therefore, according to the mouth guard according to the first embodiment, it is possible to effectively protect the teeth (tooth) and periodontal tissues (gingiva etc.) from the external force, in particular, the front teeth (incisor and canine) of the upper jaw, and the damage. In addition to preventing damage to the lips, tongue, cheeks, etc., and also reducing the impact on the jawbone, temporomandibular joint, head and neck, etc. due to external force, and damage to those organs Can be effectively prevented. In addition, even in non-contact sports, it is possible to avoid direct contact between the upper and lower teeth by the mouth guard against strong occlusion (clenching) during competition or training, and the overall occlusal force (occlusion pressure) It is possible to effectively protect the teeth and periodontal tissue.

  In addition, the mouth guard according to the first embodiment has a cut edge portion of the incisor in the long hole 32 provided in a portion corresponding to the incision edge (tooth tip) of each incisor of the front tooth covering portion 10 in the perforated wall. The insertion position does not deviate from the normal position even when an external force is unexpectedly applied. Further, in the perforated wall, by inserting the cusp portion of the canine and the cusp portion of the molar tooth into the substantially circular hole 31 provided in the cusp of the canine tooth of the front tooth covering portion 10 and the cusp of the molar tooth covering portion 20, In the same manner as the position shift prevention effect, the position shift prevention effect can be more reliably exhibited. As a result, the mouth guard can be reliably fixed at a predetermined position of the dentition in the oral cavity, and the effect of the mouth guard can be maximized. Further, when vocalizing a plosive or the like, the maxillary incisor and the mandibular incisor are engaged with each other, but the mouth guard according to Embodiment 1 penetrates the elongated hole 32 at the incisor portion of the maxilla, Since air can be passed through the long hole 32, an excellent effect is achieved that it is easy to generate a sound (plosive sound, etc.) that extrudes air from between the upper incisor and the lower incisor. . In the mouth guard according to the first embodiment, the small holes 31 and 32 of the perforated wall are formed at the incisal edge and the canine and molar cusps, but as described above, always during occlusion. The occlusal surface is in direct contact with only the first molar, and the occlusal surfaces of the other teeth are not in direct contact with each other, so problems such as breakage of the mouth guard from the small holes 31 and 32 occur. do not do.

Embodiment 2
Next, the mouth guard according to Embodiment 2 of the present invention will be described. FIG. 3 is a plan view of the mouth guard according to the second embodiment of the present invention. FIG. 4 is a perspective view of a mouth guard according to Embodiment 2 of the present invention.

  As shown in FIG. 3 and FIG. 4, the mouth guard according to the second embodiment is embodied as a custom-made mouth guard, like the mouth guard according to the first embodiment. The mouth guard according to the second embodiment includes a pair of left and right covering portions 110 and a connecting portion 120 that connects the pair of left and right covering portions 110. The covering portion 110 has a substantially concave sheet shape that covers the front and rear surfaces of the canines on both the left and right sides of the upper jaw and the front, lower, and rear surfaces of the molar teeth in close contact. The connecting portion 120 connects the pair of left and right covering portions 110 and is substantially in contact with or close to the rear surfaces of the incisors on the left and right sides of the upper jaw with the covering portion 110 attached to the canine and molar teeth. Forms a flake. Furthermore, the mouth guard opens the front part of the connecting part 120, that is, substantially the whole of the part corresponding to the incision edge and the front surface of the incisor to form an open part 121, and the circulation of saliva and air in the front-rear direction of the incisor Is allowed. The opening portion 121 has a shape in which the entire portions corresponding to the left and right middle incisors and the left and right side incisors are opened or notched. Note that the mouth guard according to the second embodiment can be manufactured by using the same material as the mouth guard according to the first embodiment and using the same manufacturing method.

  Specifically, the covering portion 110 has a concave shape having the same inner shape as that of the canines and molars (first and second premolars and first and second molars) on both the left and right sides of the upper jaw. That is, the covering portion 110 has a concave sheet shape that covers the canine from the front surface (front surface) to the back surface (back surface) and the front surface to the back surface of the molar tooth in close contact with each other. It is the same as the outer surface shape of the dentition portion composed of the first and second premolars and the first and second molars. Unlike Embodiment 1, the covering portion 110 is not formed with a gingival-corresponding portion having the same inner surface shape as the outer surface shape of the gingiva of the canine and molar teeth. The outer edge (upper edge) is located near the neck of the tooth between the crown and the gingiva. On the other hand, the connecting part 120 is formed in a thin piece corresponding to the entire rear surface of the left and right middle incisors and side incisors, and the left and right canines with the pair of left and right covering parts 110 attached to the left and right canines and molars. In addition, the entire rear surface of the molar is brought into a substantially close state or a close state. When the user of the mouth guard has the third molar, the mouth guard covering portion 120 has a sheet shape that covers the first molar to the third molar in a close state.

Effect In the mouth guard according to the second embodiment, the pair of left and right covering portions 110 are attached in close contact with the canine and molar teeth on both the left and right sides of the upper jaw, and can cover and protect those teeth. At this time, the connecting portion 120 connects and integrates the pair of left and right covering portions 110 and is substantially in contact with or close to the rear surfaces of the incisors on the left and right sides of the upper jaw. It is possible to accurately position at a predetermined position along the dentition, and it is possible to reliably prevent positional deviation after mounting. Further, the mouth guard according to the second embodiment can be suitably used as a mouth guard for non-contact sports, in particular, because it opens the front surface of the incisor portion. In the connecting part 120 between the covering parts 110, substantially the entire portion corresponding to the incision edge and the front surface of the incisor is opened to be an open part 121, and the circulation of saliva and air is allowed in the front-rear direction of the incisor. The Therefore, saliva, exhalation or inhalation in the oral cavity is between the rear surface (back surface) and the front surface (front surface) of the tooth at the incisor portion via the mouth guard opening 121, that is, the front portion from the oral dentition. Passes smoothly between the rear part. Therefore, even when the mouth guard is worn, thirst in the oral cavity especially when mouth breathing can be effectively suppressed, and mouth breathing is not hindered. As a result, it is possible to remarkably reduce the sense of discomfort and foreign matter in the mouth when using the mouth guard, and to ensure smooth mouth breathing of the user. That is, according to the mouth guard according to the second embodiment, the breathing at the time of wearing is not hindered, thirst in the oral cavity can be effectively prevented, and there is no sense of incongruity at the time of use. Can be attached to. Furthermore, according to the mouth guard according to the fourth aspect, the saliva that smoothly passes from the rear surface of the tooth to the front surface in the connecting portion is also between the inner surface of the covering portion 110 and the outer surface of the tooth in the covering portions 110 on both the left and right sides. It spreads over the entire contact surface and exhibits an adhesive function between the covering portion 110 and the tooth. As a result, the adhesion between the mouth guard and the dentition (canine teeth and molars) is remarkably improved, and it is possible to reliably prevent an unexpected dropout when the mouth guard is attached. In addition, by providing the connecting portion 120 between the left and right covering portions 110, it is possible to distribute the occlusal force transmitted to the covering portion 110 over the entire mouth guard. Further, the mouth guard connecting portion 120 is arranged on the tongue side of the palate, that is, on the rear side (back side) of the dentition, and the incisor portion is opened by the opening portion 121. It is difficult to see that the guard is worn, and the appearance when worn can be improved. Further, when uttering a plosive or the like, the incisor of the upper jaw and the incisor of the lower jaw are engaged with each other. However, in the mouth guard according to the second embodiment, the incisor portion of the upper jaw is opened by the opening portion 121 and opened. Since air can be passed through the portion 121, it is possible to produce an excellent effect that it is easy to generate a sound (plosive sound or the like) that pushes air from between the upper incisor and the lower incisor. Moreover, since the mouth guard which concerns on Embodiment 2 has open | released the incision by the open part 121, there is little uncomfortable feeling at the time of mounting | wearing.

Embodiment 3
Next, a mouth guard according to Embodiment 3 of the present invention will be described. FIG. 5 is a plan view of the mouth guard according to the second embodiment of the present invention. FIG. 6 is a perspective view of a mouth guard according to Embodiment 3 of the present invention. FIG. 7 is a cross-sectional view of a mouth guard according to Embodiment 3 of the present invention.

  As shown in FIGS. 5 to 7, the mouth guard according to the third embodiment is embodied as a custom-made mouth guard, similarly to the mouth guard according to the first embodiment. The mouth guard according to the third embodiment includes a pair of left and right covering portions 210 and a connecting portion 220 that connects the pair of left and right covering portions 210. The covering portion 210 has a substantially concave sheet shape that covers the front surface, the lower surface, and the rear surface of the molar teeth on the left and right sides of the upper jaw and the front surface and the rear surface of the gingiva of the molar portion in close contact with each other. The connecting portion 220 connects the pair of left and right covering portions 210 and has a thin piece shape that is substantially in contact with or close to the hard palate of the upper jaw when the covering portion 210 is attached to the molar teeth. Further, the mouth guard opens substantially the entire portion corresponding to the incisor and the canine so as to allow the circulation of saliva and air in the front-rear direction of the incisor and the canine. The mouth guard according to the third embodiment can be manufactured using the same material and the same manufacturing method as the mouth guard according to the first embodiment.

  Specifically, the covering portion 210 is a molar corresponding portion having a concave shape having the same inner shape as the outer shapes of the molars (first and second premolars and first and second molars) on both the left and right sides of the upper jaw. 211 and a gingival corresponding portion 212 which is integrally provided on both front and rear sides of the molar corresponding portion 211 and has the same inner surface shape as the outer surface shape of the gingiva of the molar portion, and the bottom surface from the front surface (front surface) of the molar tooth After that, it forms a sheet that covers the back surface (back surface) and the front and back surfaces of the gingiva of the molar portion in close contact. In other words, the molar correspondence part 211 of the covering part 210 is a front surface (front surface), a lower surface (bottom surface), and a rear surface (back surface) of the molars (first and second premolars and first and second molars) on both the left and right sides of the upper jaw. A concave-shaped sheet shape corresponding to the dentition of the molar portion made of is formed, and the inner surface shape thereof is the same as the outer surface shape of the dentition portion made of the first and second premolars and the first and second molars. It has become. Further, the inner surface shape of the gingival corresponding portion 212 is substantially the same as the outer surface shape of the gingival portions of the first and second premolars and the first and second premolars. When the mouth guard user has the third molar, the mouth guard covering portion 210 has a sheet shape that covers the first molar tooth to the third molar tooth and the gingival portion in close contact. On the other hand, the connecting portion 220 has a thin shape that can be deformed so as to correspond to the curved shape of the upper hard palate, and corresponds to the curved surface of the hard palate with the pair of left and right covering portions 210 attached to the left and right molars. It becomes a curved shape and is in a substantially close state or a close state to the hard palate.

Effect In the mouth guard according to the third embodiment, the pair of left and right covering portions 210 are attached in close contact with the molar teeth and gums on both the left and right sides of the upper jaw, and can cover and protect those teeth and gums. At this time, the connecting part 220 connects and integrates the pair of left and right covering parts 210 and is substantially in contact with or close to the hard palate of the upper jaw, so the mouth guard is placed along the dentition in the oral cavity. It is possible to accurately position at a predetermined position, and it is possible to reliably prevent positional deviation after mounting. In addition, the mouth guard according to the third embodiment can be preferably used as a mouth guard for non-contact sports, in particular, since it substantially opens the entire portion corresponding to the incisors and canines. In the connecting part 220 between the pair of left and right covering parts 210 of the mouth guard, the saliva and the air flow in the front-rear direction of the incisor and canine teeth by the opening part 221 provided in substantially the entire part corresponding to the incisor and canine tooth. Is acceptable. Therefore, saliva, exhaled air or inhalation in the oral cavity is between the rear surface (back surface) and the front surface (front surface) of the tooth at the incisor portion via the mouth guard opening 221, that is, the front portion from the dentition of the oral cavity. Passes smoothly between the rear part. Therefore, even when the mouth guard is worn, thirst in the oral cavity especially when mouth breathing can be effectively suppressed, and mouth breathing is not hindered. As a result, it is possible to remarkably reduce the sense of discomfort and foreign matter in the mouth when using the mouth guard, and to ensure smooth mouth breathing of the user. That is, according to the mouth guard according to the third embodiment, the breathing at the time of wearing is not hindered, thirst in the oral cavity can be effectively prevented, and there is no sense of incongruity at the time of use. Can be attached to. Furthermore, according to the mouth guard according to the third embodiment, the saliva that smoothly passes from the rear surface to the front surface of the tooth in the connecting portion 220 is also applied to the inner surface of the covering portion 210, the outer surface of the tooth, and the gingiva in the covering portions 210 on both the left and right sides. It spreads over the entire contact surface between the outer surface and exerts an adhesive function between the covering portion 210 and the teeth and gums. As a result, the adhesion between the mouth guard and the dentition (molar teeth) and gingiva is remarkably improved, and it is possible to reliably prevent the unexpected dropout when the mouth guard is attached. In addition, by providing the connecting portion 220 between the left and right covering portions 210, it is possible to distribute the occlusal force transmitted to the covering portion 210 over the entire mouth guard. Further, the mouth guard connecting part 220 is arranged on the tongue side of the palate, that is, on the rear side (back side) of the dentition, and the part corresponding to the incisor and the canine is opened by the opening part 221. It is difficult to see that the mouth guard is worn, and the appearance when worn can be improved. Further, in the case of vocalization such as a plosive sound, the maxillary incisor and the mandibular incisor are engaged with each other. However, in the mouth guard according to the third embodiment, the maxillary incisor portion is opened by the opening portion 221. Since air can be passed through the portion 221, it is possible to produce an excellent effect that it is easy to generate a sound (plosive sound or the like) that extrudes air from between the upper incisor and the lower incisor. Moreover, since the mouth guard which concerns on Embodiment 3 has open | released the incisor and the canine by the opening part 221, there is little discomfort at the time of mounting | wearing.

FIG. 1 is a plan view of a mouth guard according to Embodiment 1 of the present invention. FIG. 2 is a perspective view of the mouth guard according to Embodiment 1 of the present invention. FIG. 3 is a plan view of the mouth guard according to the second embodiment of the present invention. FIG. 4 is a perspective view of a mouth guard according to Embodiment 2 of the present invention. FIG. 5 is a plan view of the mouth guard according to the second embodiment of the present invention. FIG. 6 is a perspective view of a mouth guard according to Embodiment 3 of the present invention. FIG. 7 is a cross-sectional view of a mouth guard according to Embodiment 3 of the present invention.

Explanation of symbols

10 front tooth covering part, 20: molar tooth covering part 31: substantially circular hole (small hole), 32: long hole (small hole)
110: Covering part, 120: Connecting part, 121: Opening part 210: Covering part, 220: Connecting part, 221: Opening part

Claims (5)

  A mouth guard characterized by a sheet that covers all the teeth of the upper jaw in close contact with many small holes penetrating almost the entire surface. An anterior tooth covering that covers the front and rear surfaces of the front teeth on the left and right sides of the upper jaw and the front and rear surfaces of the gingiva of the front teeth portion in close contact;
A front cover, a lower face and a rear face of the molars on both the left and right sides of the upper jaw, and a molar covering part which covers the front face and the rear face of the gingiva of the molar portion in close contact with each other;
The front tooth covering portion and the portion other than the portion corresponding to the occlusal surface of the first molar in the molar covering portion are perforated walls in which a plurality of small holes are formed penetrating in the thickness direction over substantially the entire surface. With
The mouth guard, wherein the portion corresponding to the occlusal surface of the first molar in the molar covering portion is a non-porous wall that does not form the small hole at all.   The small hole of the perforated wall includes a long hole provided in a portion corresponding to the incision edge of each incisor of the front tooth covering portion, a cusp of each canine tooth of the front tooth covering portion, and the first tooth of the molar covering portion. A plurality of circular holes provided in portions corresponding to the respective cusps of each molar except the molars, and a plurality of portions provided with substantially uniform arrangement density on substantially the entire surface of the portions corresponding to the gingiva of the anterior tooth covering portion and the molar covering portion. The mouth guard according to claim 2, comprising a substantially circular hole. A pair of left and right covering portions that cover the front, lower and rear surfaces of the canine and molar teeth on the left and right sides of the upper jaw in a close state;
And connecting the pair of left and right covering parts, and having a connecting part that is substantially in contact with or close to the rear surfaces of the incisors on both the left and right sides of the upper jaw in a state where the covering part is attached to the canine and molar teeth,
A mouth guard characterized in that substantially the entire portion corresponding to the cutting edge and the front surface of the incisor is opened to be an open portion, and the circulation of saliva and air is allowed in the front-rear direction of the incisor. A pair of left and right covering parts that closely cover the front, lower and rear surfaces of the molars on the left and right sides of the upper jaw and the front and rear surfaces of the gingiva of the molar part;
And connecting the pair of left and right covering parts, and a connecting part that is substantially in contact with or close to the hard palate of the upper jaw in a state where the covering part is mounted on a molar tooth,
A mouth guard characterized in that substantially all of the portions corresponding to the incisors and canines are opened to allow the flow of saliva and air in the front-rear direction of the incisors and canines.

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