JP2023032707A - Mouth piece - Google Patents

Abstract

To provide a mouth piece capable of achieving preferable attachment feeling, suppressing breakage and deformation, and accurately positioning upper jaw and lower jaw mouth pieces relatively.SOLUTION: A mouth piece comprises: upper jaw and lower jaw mouth pieces; a positioning member which is arranged on one of the upper jaw and lower jaw mouth pieces, and whose position can be adjusted in a cross direction; a first support part which can support the positioning member; a stopper which is arranged on the other of the upper jaw and lower jaw mouth pieces, and which contacts the positioning member for regulating rearward displacement of the lower jaw mouth piece; and a second support part for supporting the stopper. To at least one of the first support part and second support part, an attachment part attached to a tooth row is detachably attached.SELECTED DRAWING: Figure 1

Description

The present invention relates to mouthpieces.

Obstructive sleep apnea syndrome is said to be caused mainly by lowering of the lower jaw and obstruction of the airway. Therefore, various mouthpieces have been proposed to improve obstructive sleep apnea syndrome. These mouthpieces restrict the rearward displacement of the user's mandible and keep the airway wide, thereby improving sleep apnea and snoring.

For example, Patent Literature 1 proposes a mouthpiece having an upper jaw mouthpiece, a lower jaw mouthpiece, and a metal connecting member that connects them. In this mouthpiece, the relative positions of the maxillary mouthpiece and the mandibular mouthpiece are adjusted by the connecting member, and the mandible of the user wearing the mouthpiece is displaced forward. The maxillary mouthpiece and the mandibular mouthpiece are constructed of hard material.

Further, Patent Literature 2 describes a mouthpiece having an upper jaw mouthpiece, a lower jaw mouthpiece, and a connecting member that connects them. In this mouthpiece, the coupling member adjusts the relative positions of the maxillary mouthpiece and the mandibular mouthpiece, and regulates the rearward displacement of the user's mandible. In the mouthpiece, for example, a support portion made of a hard material is joined to an upper jaw mouthpiece and a lower jaw mouthpiece made of a soft material, and the support portion supports the connecting member.

U.S. Patent Application Publication No. 2007/0224567 WO2019/230152

All of the above mouthpieces are used by attaching the upper jaw mouthpiece and the lower jaw mouthpiece directly to the dentition. However, in the mouthpiece shown in Patent Literature 1, the upper jaw mouthpiece and the lower jaw mouthpiece are made of a hard material, which tends to cause discomfort to the user wearing the mouthpiece. On the other hand, if the upper jaw mouthpiece and the lower jaw mouthpiece are entirely made of a soft material in order to improve the feeling of wearing, the parts of the upper jaw mouthpiece and the lower jaw mouthpiece that come into contact with the dentition may wear out, or the parts near the connecting member may become worn. There have been problems such as damage or deformation of the maxillary mouthpiece and the mandibular mouthpiece, and the inability to adjust the relative positions of the maxillary mouthpiece and the mandibular mouthpiece (cannot be positioned).

On the other hand, in the mouthpiece shown in Patent Document 2, the upper jaw mouthpiece and the lower jaw mouthpiece can be made of a soft material, and the support portion can be made of a relatively hard material, and these are integrated. there is Such a mouthpiece does not have the above problems, but when a large force (load) is applied to the mouthpiece due to, for example, bruxism or clinching, the force is not distributed and the upper jaw mouthpiece and the lower jaw mouthpiece do not work. Since it is easy to transmit to the mouthpiece, local stress is generated inside the maxillary mouthpiece and the mandibular mouthpiece, deforming it, and there are cases where accurate positioning is not possible.

The present invention has been made in view of the above problems. Specifically, the object is to provide a mouthpiece that is comfortable to wear, is less likely to be damaged or deformed, and allows accurate relative positioning of the maxillary mouthpiece and the mandibular mouthpiece.

In order to solve the above problems, the present invention provides the following mouthpiece.
an upper jaw mouthpiece and a lower jaw mouthpiece; a positioning member arranged in one of the upper jaw mouthpiece and the lower jaw mouthpiece, the position of which can be adjusted in the front-rear direction; a first supporting portion that supports the positioning member; and a stopper disposed on the other mouthpiece of the mandibular mouthpiece, which abuts against the positioning member and restricts rearward displacement of the mandibular mouthpiece, and a second support portion for supporting the stopper. , a mouthpiece, wherein an attachment part to be attached to a row of teeth is detachably attached to at least one of the first support part and the second support part.

ADVANTAGE OF THE INVENTION According to the present invention, there is provided a mouthpiece that is comfortable to wear, is less likely to be damaged or deformed, and allows accurate relative positioning of the maxillary mouthpiece and the mandibular mouthpiece.

1A is a schematic perspective view of the maxillary mouthpiece according to the first embodiment of the present invention, and FIG. 1B is a schematic perspective view of the mandibular mouthpiece according to the first embodiment of the present invention. FIG. 2 is a schematic exploded perspective view of the maxillary mouthpiece of FIG. 1A. FIG. 3 is a schematic exploded perspective view of the mandibular mouthpiece of FIG. 1B. 4A is a schematic cross-sectional view along line 4A-4A of the maxillary mouthpiece of FIG. 1A, and FIG. 4B is a schematic partial cross-sectional view along line 4B-4B of the mandibular mouthpiece of FIG. 1B. FIG. 5 is a schematic side view of the mouthpiece shown in FIG. 1 when closed. 6A is a schematic perspective view of an upper jaw mouthpiece according to a second embodiment of the present invention, and FIG. 6B is a schematic perspective view of a lower jaw mouthpiece according to a second embodiment of the present invention. FIG. 7 is a schematic exploded perspective view of the maxillary mouthpiece of FIG. 6A. FIG. 8 is a schematic exploded perspective view of the mandibular mouthpiece of FIG. 6B. 9A and B are schematic perspective views showing modifications of the mouthpiece according to the second embodiment of the present invention. FIG. 10 is a schematic perspective view showing a modification of the mouthpiece according to the second embodiment of the invention.

Hereinafter, the mouthpiece of the present invention will be described using a plurality of embodiments. In the following description, "forward" and "backward" respectively refer to the direction toward the front of the user wearing the mouthpiece (the direction toward the mouth when viewed from the body of the tongue in the oral cavity) and the rearward direction of the user. (the direction toward the throat when viewed from the body of the tongue in the oral cavity). In addition, "downward" means the downward direction of the user wearing the mouthpiece (the direction from the top of the head to the feet when the user stands upright), and "lateral direction" means the direction of use with the mouthpiece attached. Based on the midline of the user's upper jaw, it means the left and right directions toward the front of the user (specifically, the direction toward both cheeks when viewed from the midline of the upper jaw). "Outer" and "inner" mean respectively the side closer to and farther from the body surface of the user wearing the mouthpiece.

Further, in the following description, the time when the user wearing the mouthpiece closes the mouth is called "closed", and the time when the user wearing the mouthpiece opens the mouth is called "open". When the mouth is closed, the maxillary mouthpiece and the mandibular mouthpiece are arranged such that their facing surfaces are substantially parallel to each other. The pieces are arranged non-parallel such that their facing surfaces form an angle of up to about 45°.

[First Embodiment]
1A is a schematic perspective view of an upper jaw mouthpiece 110 according to the first embodiment of the present invention, and FIG. 1B is a schematic perspective view of a lower jaw mouthpiece 120 according to the first embodiment of the present invention. be. 2 is a schematic exploded perspective view of the maxillary mouthpiece 110 of FIG. 1A, and FIG. 3 is a schematic exploded perspective view of the mandibular mouthpiece 120 of FIG. 1B. 4A is a schematic cross-sectional view along line 4A-4A of maxillary mouthpiece 110 of FIG. 1A, and FIG. 4B is a schematic cross-sectional view along line 4B-4B of mandibular mouthpiece 120 of FIG. 1B. FIG. 5 is a schematic side view of the mouthpiece 100 when the mouth is closed.

As shown in FIGS. 1A and B, the mouthpiece 100 of this embodiment has an upper jaw mouthpiece 110 and a lower jaw mouthpiece 120 .

The maxillary mouthpiece 110 has a pair of left and right stoppers 130 and a second support portion 160 that supports them. The mandibular mouthpiece 120 has a pair of left and right positioning members 140 whose positions are adjustable in the front-rear direction, and a first support portion 170 that supports them. Attachment portions 180 and 190 to be attached to the row of teeth are detachably attached to the second support portion 160 and the first support portion 170, respectively.

In the mouthpiece 100 of the present embodiment, the relative positions of the maxillary mouthpiece 110 and the mandibular mouthpiece 120 are determined by the contact between the positioning member 140 and the stopper 130, and the position of the mandible with respect to the user's maxilla is properly positioned. adjusted. Therefore, the airway is kept wide during sleep, and apnea and snoring are improved.

Mounting portions 180 and 190 are detachably attached to second support portion 160 and first support portion 170, respectively. As a result, the force applied to the mouthpiece 100 is dispersed and transmitted to the entire mounting portions 180 and 190 more easily than in the case where the two are integrated, so that deformation or the like is less likely to occur. As a result, the relative positioning of the maxillary mouthpiece 110 and the mandibular mouthpiece 120 can be performed with high accuracy while improving the wearing comfort. That is, when the two are integrated, the force applied to the hard member of the mouthpiece is easily transmitted to the soft member as it is without being dispersed, so stress is locally generated inside the soft member. It may occur and cause deformation. On the other hand, when the two are separated, the force applied to the second support portion 160 and the first support portion 170 of the mouthpiece is likely to be dispersed and transmitted to the entire mounting portions 180 and 190. Local stress is less likely to occur inside the portions 180 and 190, and deformation and the like can be suppressed.
In addition, even if the mounting portions 180 and 190 wear out due to repeated use, the mounting portions 180 and 190 can be replaced and used, so that usability can be improved. Further, by making the bending elastic modulus of the mounting portions 180 and 190 lower than the bending elastic modulus of the second support portion 160 and the first support portion 170, it is possible to further improve the feeling of wearing.

Each configuration of the present embodiment will be described below.

1. Maxillary Mouthpiece and Mandibular Mouthpiece The maxillary mouthpiece 110 has a second support 160 that supports the stopper 130 as described above. Mandibular mouthpiece 120 has first support 170 that supports positioning member 140 as described above. Attachment portions 180 and 190 to be attached to the row of teeth are detachably attached to the second support portion 160 and the first support portion 170, respectively.

1-1. First Support Section and Second Support Section The second support section 160 and the first support section 170 are configured such that the mounting sections 180 and 190 are detachably attached thereto, respectively. For example, second support portion 160 and first support portion 170 have recesses 162 and 172 that can accommodate mounting portions 180 and 190, respectively (see FIGS. 1-3).

The second support part 160 and the first support part 170 are configured to cover at least the bottom surface side or upper surface side and the outer side surface side of the tooth row of the mounting parts 180 and 190 when the mounting parts 180 and 190 are attached. Alternatively, it may be configured to cover the inner surface side, the bottom surface side or upper surface side, and the outer surface side of the tooth row. Above all, the second supporting portion 160 and the first supporting portion 170 support the inner surface side, the bottom surface side or the upper surface side, and the outer surface side of the tooth row of the mounting portions 180 and 190 when the mounting portions 180 and 190 are attached. It is preferably configured in a covering arch (see Figures 4A and B). Thereby, not only can the mounting portions 180 and 190 be fixed more stably, but also the load can be easily distributed, and the stopper 130 or the positioning member 140 can be firmly supported.

The second support portion 160 and the first support portion 170 may be provided so as to cover the entire row of teeth, or may be provided so as to cover only a portion of the row of teeth. The second support portion 160 and the first support portion 170 are preferably provided so as to cover the entire dentition from the viewpoint of facilitating fixing of the mounting portions 180 and 190 described later (see FIGS. 1 to 3).

In addition, the second support portion 160 and the first support portion 170 are arranged so that the ends of the attachment portions 180 and 190 on the gum side are aligned with the second support portion 160 and the first support portion 170 when the attachment portions 180 and 190 are attached. (See FIG. 1). Thereby, attachment and detachment of the attachment portions 180 and 190 can be facilitated. Further, when the mounting portions 180 and 190 are larger than the second support portion 160 and the first support portion 170, the elasticity of the mounting portions 180 and 190 makes it easier to remove the second support portion 160 and the first support portion 170 from the dentition. In addition, manufacturing (molding) of the second support portion 160 and the first support portion 170 is facilitated. The amount of protrusion of the gum-side ends of the mounting portions 180 and 190 may be greater on the inside of the dentition than on the outside of the dentition (see FIGS. 4A and B).

The second support portion 160 preferably has a fixing portion 164 for fixing the mounting portion 180 (see FIG. 4A), and the first support portion 170 preferably has a fixing portion 174 for fixing the mounting portion 190 (see FIG. 4A). 4B).

The fixing portions 164 and 174 may be uneven shapes or friction surfaces (such as rough surfaces) provided at the contact portion with the mounting portion 180 or 190, or the inclination of the inner wall surfaces of the recesses 162 and 172, or the like. For example, the contact portion of the second support portion 160 with the mounting portion 180 (in this embodiment, the inner wall surface of the concave portion 162 of the second support portion 160) serves as the fixing portion 164 and contacts the second support portion 160 of the mounting portion 180. (See FIG. 4A). The contact portion of the first support portion 170 with the mounting portion 190 (in this embodiment, the inner wall surface of the concave portion 172 of the first support portion 170) serves as the fixing portion 174 and contacts the mounting portion 190 with the first support portion 170. (See FIG. 4B). The uneven shape is not limited to a shape corresponding to the row of teeth. The fixed portions 164 and 174 may be provided on the entire contact portion or may be provided only on a part thereof.

From the viewpoint of facilitating the distribution and transmission of the force applied to the mouthpiece 100 throughout the mounting portions 180 and 190, or from the viewpoint of making it difficult for the mounting portions 180 and 190 to come off during use, the second support portion 160 and the first support portion 170 It is preferable to increase the area of the contact portion with the mounting portions 180 and 190. It is preferable to provide an uneven shape on the inner wall surface (outer inner wall surface 172a, inner inner wall surface 172b, upper surface 172c) of the recess 172 of the 1 support portion 170 .

In particular, from the viewpoint of facilitating stress distribution, the inner wall surfaces 162a and 172a outside the concave portions 162 and 172 of the second support portion 160 and the first support portion 170 and the outer surfaces 184 and 194 of the mounting portions 180 and 190 It is preferable to increase the contact area. For example, the outer inner wall surfaces 162a and 172a of the second support portion 160 and the first support portion 170 are all provided with an uneven shape, or the height of the outer inner wall surfaces 162a and 172a is adjusted to the height of the inner inner wall surfaces 162b and 172b. It is preferable to make it higher than the height. The height of the outer inner wall surfaces 162a and 172a of the recesses 162 and 172 of the second support portion 160 and the first support portion 170 may or may not be substantially uniform throughout, but it is easy to disperse stress. From the point of view of improving the thickness, it is preferable that the thickness is substantially uniform over the entire surface (see FIG. 2).

In addition, from the viewpoint of reducing the foreign object feeling, the height of the inner wall surfaces 162b and 172b of the second support portion 160 and the first support portion 170 is preferably lower than the height of the outer inner wall surfaces 162a and 172a. Preferred (see Figures 1, 2, 4A and 4B).

From the viewpoint of making it difficult for the mounting portions 180 and 190 to come off the second support portion 160 and the first support portion 170 during use, the second support portion 160 and the first support portion 170 on the front side (for example, the first to third teeth) It is preferable that the outer inner wall surfaces 162a and 172a and the inner inner wall surfaces 162b and 172b of the teeth are respectively inclined backward (relative to the dentition plane) from the tip of the tooth toward the gum (Figs. 1A, B and 5).

Furthermore, from the viewpoint of making it easier to attach the mounting parts 180 and 190, or from the viewpoint of making it difficult for the second support part 160 and the first support part 170 to directly touch the inner gums, etc., the second support part 160 and the first support part The angle of inclination of the inner inner wall surfaces 162b and 172b (relative to the tooth surface) of the portion 170 is preferably greater than the angle of inclination of the outer inner wall surfaces 162a and 172a (see FIGS. 1A, 1B and 5).

The rear ends of the second support 160 and the first support 170 are preferably open (see FIGS. 1A and 1B). Accordingly, mounting portions 180 and 190 can be easily attached to second support portion 160 and first support portion 170 .

Further, the rear ends of the second support part 160 and the first support part 170 are arranged so as not to cover at least a part of the rear ends of the mounting parts 180 and 190 (so that the rear ends of the mounting parts 180 and 190 protrude). ) is preferably provided. As a result, for example, the second support portion 160 and the first support portion 170, which have a relatively high bending elastic modulus, are less likely to come into direct contact with the rear gums or the like, thereby reducing the feeling of a foreign body.

The thicknesses of the second support portion 160 and the first support portion 170 have sufficient strength to support the stopper 130 and the positioning member 140, and when the user wears the mouthpiece 100, the thickness of the buccal side, the tongue side, and the opposite side. There is no particular limitation as long as the thickness does not excessively protrude toward the mandibular or maxillary side. For example, from the viewpoint of ensuring sufficient strength for supporting stopper 130 and positioning member 140 , it is preferable that the thickness is greater than the thickness of mounting portions 180 and 190 . Alternatively, the thickness of the second support portion 160 and the first support portion 170 may be made thinner than the thickness of the mounting portions 180 and 190 from the viewpoint of emphasizing the reduction of foreign body sensation.

The thickness of the second support portion 160 and the first support portion 170 may be uniform throughout, or may not be uniform. For example, from the viewpoint of reducing the foreign body sensation felt by the user, the thickness of the front side (incisor side, for example, first to third teeth) of the second support portion 160 and the first support portion 170 is It is preferably thinner than the sides, eg teeth 4 to 8) (see Figures 2 and 3). Moreover, from the viewpoint of firmly supporting the stopper 130 or the positioning member 140, the thickness of the portion where the stopper 130 or the positioning member 140 is provided is preferably thicker than the other portions.

Second support portion 160 and first support portion 170 include a material having a different flexural modulus than mounting portions 180 and 190 . For example, the second support part 160 and the first support part 170 are made of a high elastic material with a higher bending elastic modulus than the thermoplastic resin composition contained in the mounting parts 180 and 190 described later, or a low elastic modulus with a low bending elastic modulus. material. Above all, from the viewpoint of ensuring sufficient strength for supporting stopper 130 and positioning member 140, second support portion 160 and first support portion 170 are made of a thermoplastic resin composition contained in mounting portions 180 and 190. It preferably contains a highly elastic material with a high flexural modulus.

That is, the bending elastic moduli of the second supporting portion 160 and the first supporting portion 170 are preferably higher than the bending elastic moduli of the mounting portions 180 and 190 . Specifically, the lower limit of the difference between the flexural modulus of the second support portion 160 and the first support portion 170 and the flexural modulus of the mounting portions 180 and 190 is not particularly limited, but is preferably 1000 MPa or more. Although the upper limit is not particularly limited, it is preferably 9500 MPa or less, and more preferably 9000 MPa or less. The flexural modulus is measured according to JIS T6501.

The second support part 160 and the first support part 170 may further contain other materials (fillers, additives, etc.) other than the high-elasticity material and the low-elasticity material, if necessary. The amount of the high-elasticity material and the low-elasticity material with respect to the total mass of the second support part 160 and the first support part 170 is preferably 50 to 100% by mass, more preferably 60 to 100% by mass, and 80% by mass. It is particularly preferred to be up to 100% by mass. For example, when the amount of the high-elasticity material is within the above range, the second support portion 160 and the first support portion 170 have a sufficiently high bending elastic modulus, so that the stopper 130 and the positioning member 140 can be easily supported.

The high-elasticity material and the low-elasticity material are not particularly limited as long as the flexural modulus satisfies the above relationship. Examples of highly elastic materials include metallic materials and (meth)acrylic resins.

The metal material may be any metal that does not easily affect the human body, examples of which include titanium, iron (steel including stainless steel), gold, silver, platinum, cobalt, chromium, and alloys thereof. The metal material may be one whose corrosion resistance is enhanced by a chemical conversion film or the like.

The (meth)acrylic resin may be any resin that mainly contains (meth)acrylate-derived units ((meth)acrylate units). The content of (meth)acrylate units is preferably 50 to 100% by mass, more preferably 60 to 100% by mass, and still more preferably 80 to 100% by mass with respect to the total amount of structural units of the (meth)acrylic resin. be. The (meth)acrylic resin may be a homopolymer of methacrylate or a copolymer of methacrylate and acrylate.

The (meth)acrylate units are preferably alkyl (meth)acrylate units. The number of carbon atoms in the alkyl portion of the alkyl (meth)acrylate unit is preferably 1-6, more preferably 1-3, still more preferably 1 or 2, and particularly preferably 1. The (meth)acrylate portion of the alkyl (meth)acrylate units is preferably methacrylate.

The (meth)acrylic resin may further contain structural units other than the (meth)acrylate unit, if necessary. Examples of structural units other than (meth)acrylate units include structural units derived from (meth)acrylic acid (preferably methacrylic acid) and structural units derived from α-olefins (preferably ethylene, propylene or butylene). included.

The (meth)acrylic resin is preferably polymethyl methacrylate (PMMA) or methyl methacrylate-methacrylic acid copolymer (MMA-MAA copolymer), more preferably PMMA.

The (meth)acrylic resin preferably has a mass average molecular weight (Mw) of 10,000 to 1,000,000, more preferably 20,000 to 800,000, even more preferably 50,000 to 500,000. The mass average molecular weight (Mw) is a value measured by gel permeation chromatography (GPC) and is a polymethyl methacrylate conversion value.

1-2. Attachment Part The attachment part 180 is to be attached to the maxillary dentition, and is detachably attached to the second support part 160 (see FIG. 2). The attachment part 190 is attached to the row of teeth of the lower jaw, and is detachably attached to the first support part 170 (see FIG. 3).

The mounting portions 180 and 190 may be provided so as to cover the entire row of teeth, or may be provided so as to cover only a portion thereof. From the viewpoint of facilitating transmission of the force applied to the mouthpiece due to bruxism, clinching, etc. to the mounting portions 180 and 190, the mounting portions 180 and 190 are preferably provided so as to cover the entire dentition (Fig. 2). and 3).

Mounting portions 180 and 190 have recesses that can accommodate dentition. In this embodiment, the mounting portions 180 and 190 have tooth-row modeled portions 182 and 192 (recesses) corresponding to the user's dentition, respectively. good.

The outer surface 184 (outer surface 184a, inner surface 184b, bottom surface 184c) of the mounting portion 180 and the outer surface 194 (outer surface 194a, inner surface 194b, upper surface 194c) of the mounting portion 190 each have a tooth row shape throughout. It can have a corresponding uneven shape (see Figures 2 and 3). As described above, the concave-convex shape may be a shape complementary to the inner wall surfaces of the concave portion 162 of the second support portion 160 and the concave portion 172 of the first support portion 170, respectively. good too.

As described above, from the viewpoint of easily distributing and transmitting the force applied to the mouthpiece 100 to the mounting portions 180 and 190, or from the viewpoint of making it difficult to remove the mounting portions 180 and 190 during use, the mounting portions 180 and 190 and the second It is preferable to increase the areas of the contact portions with the support portion 160 and the first support portion 170, respectively, and it is preferable to provide the entire outer surfaces 184 and 194 of the mounting portions 180 and 190 with uneven shapes.

In particular, the contact area between the outer surface 184a of the mounting portion 180 and the inner wall surface 162a outside the recess 162 of the second support portion 160, and the contact area between the outer surface 194a of the mounting portion 190 and the outer surface of the recess 172 of the first support portion 170. It is preferable to increase the contact area with the inner wall surface 172a. It is preferably higher than the height of sides 184b and 194b (see FIGS. 4A and B).

The thickness of the mounting portions 180 and 190 is appropriately selected in consideration of the desired strength, the shape of the user's dentition, and the wearability. For example, from the viewpoint of reducing the foreign object feeling and enhancing the wearing feeling, it is preferable that the thickness of the mounting portions 180 and 190 is thinner than the thickness of the second supporting portion 160 and the first supporting portion 170 .

The thickness of the mounting portions 180 and 190 may or may not be uniform throughout. For example, from the viewpoint of preventing the area covered by the second support part 160 and the first support part 170 from being excessively thick and improving the wearing comfort, the second support part 160 and the first support part of the wearing parts 180 and 190 The thickness of the area covered by 170 (eg, the tooth tip side) is preferably thinner than the thickness of the area not covered by the second support 160 and the first support 170 (eg, the gum side). Further, from the viewpoint of further reducing the feeling of a foreign object, it is preferable that the thickness of the front side (for example, the first to third teeth) of the mounting portions 180 and 190 is thinner than the thickness of the rear side (see FIG. 1).

Mounting portions 180 and 190 are preferably composed primarily of a thermoplastic resin composition. The thermoplastic resin composition only needs to contain a thermoplastic resin, and may further contain fillers, additives, and the like, if necessary. A metal wire, plate, or the like may be embedded in the thermoplastic resin composition for imparting strength.

The amount of the thermoplastic resin composition with respect to the total mass of the mounting parts 180 and 190 is preferably 50 to 100% by mass, more preferably 60 to 100% by mass, and 80 to 100% by mass. More preferred. When the amount of the thermoplastic resin composition is within the above range, the total mass of the mouthpiece 100 becomes small, and the wearing feeling tends to be good. In addition, the mouthpiece 100 tends to have an appropriate hardness, and the feeling of wearing tends to increase.

The flexural modulus of the thermoplastic resin composition contained in the mounting portions 180 and 190 may be higher or lower than the flexural modulus of the material contained in the second support portion 160 or the first support portion 170. However, from the viewpoint of improving wearing comfort, it is preferably lower than the flexural modulus of the material included in the second support portion 160 or the first support portion 170 .

That is, the flexural modulus of the mounting portions 180 and 190 (or the thermoplastic resin composition contained therein) is higher than the flexural modulus of the second support portion 160 and the first support portion 170 (or the highly elastic material contained therein). It is preferably low, for example 50 to 500 MPa, more preferably 50 to 300 MPa, even more preferably 50 to 250 MPa. When the flexural modulus of the mounting portions 180 and 190 is 50 MPa or more, they have appropriate strength, so that the force applied to the mouthpiece 100 can be easily dispersed over the entire mounting portions 180 and 190, and the upper jaw mouthpiece 110 and the lower jaw mouthpiece can be obtained. Relative positioning of pieces 120 is easy. When the flexural modulus of the mounting portions 180 and 190 is 500 MPa or less, the followability and wearability of the mounting portions 180 and 190 to the dentition are less likely to be impaired.

The tensile strength of the mounting parts 180 and 190 (or the thermoplastic resin composition contained therein) is preferably 150N or more and less than 2000N, more preferably 150 to 500N. When the tensile strength is within the above range, the followability of the mounting portions 180 and 190 to the dentition tends to be enhanced. Tensile strength was obtained by making a hole of φ1.5 mm in the sixth tooth row of the mounting parts 180 and 190 of the mouthpiece (thickness 3 mm) prepared using a Nissin standard model, and performing a tensile test in the direction of the molars (backward). , means the strength at which the attachment portions 180 and 190 are torn.

Examples of thermoplastic resins contained in the thermoplastic resin composition include polyester resins, polycarbonate resins, polyamide resins, (meth)acrylic resins, and the like. (Meth)acrylic means acrylic, methacrylic, or both, and (meth)acrylate means acrylate, methacrylate, or both.

Polyester resins are, for example, polycondensates of polycarboxylic acids such as dicarboxylic acids and polyalcohols such as diols, examples of which include polyethylene terephthalate (PET), polypropylene terephthalate, and polybutylene terephthalate. A known resin can be used as the polycarbonate resin.

Examples of polyamide resins include aliphatic polyamide resins (including alicyclic polyamide resins), semi-aromatic polyamide resins, and aromatic polyamide resins. Aliphatic polyamide resins are resins containing, as main components, structural units that contain amide bonds and do not contain aromatic rings (amide bond-containing structural units that do not contain aromatic rings). The phrase “comprising amide bond-containing structural units containing no aromatic ring as a main component” means that the amide bond-containing structural unit containing no aromatic ring is 80 mol% or more of the total number of moles of the amide bond-containing structural units, preferably means that it contains 90 to 100 mol %.

Examples of aliphatic polyamide resins (including alicyclic polyamide resins) include resins obtained by polycondensation reaction of aliphatic dicarboxylic acids having 2 to 14 carbon atoms and aliphatic diamines having 4 to 12 carbon atoms; Resin obtained by polycondensation reaction of aliphatic aminocarboxylic acid having 6 to 12 atoms; Resin obtained by ring-opening polymerization reaction of lactam having 6 to 12 carbon atoms; Aliphatic dicarboxylic acid having 2 to 14 carbon atoms and alicyclic ring Resin obtained by polycondensation reaction with diamine having at least one formula structure; Resin obtained by polycondensation reaction of aliphatic dicarboxylic acid having at least one alicyclic structure and aliphatic diamine having 4 to 12 carbon atoms; Resins obtained by subjecting a dicarboxylic acid having at least one alicyclic structure and a diamine having at least one alicyclic structure to a polycondensation reaction are included.

Examples of aliphatic polyamide resins include polyamide 6, polyamide 6.6, polyamide 4.6, polyamide 6.10, polyamide 6.12, polyamide 6.14, polyamide 6.13, polyamide 6.15, polyamide 6.6. 16, Polyamide 9/2, Polyamide 9/10, Polyamide 9/12, Polyamide 9/13, Polyamide 9/14, Polyamide 9/15, Polyamide 6/16, Polyamide 9/36, Polyamide 10/10, Polyamide 10/ 12, polyamide 10-13, polyamide 10-14, polyamide 11, polyamide 12, polyamide 12-10, polyamide 12-12, polyamide 12-13, polyamide 12-14, and copolymers thereof. The aliphatic polyamide resin may be a commercially available product, and examples thereof include Trogamid CX7323 manufactured by Daicel-Degussa. Among these, polyamide 11, polyamide 12, and a polymer of an aliphatic dicarboxylic acid and a diamine having an alicyclic structure are particularly preferable from the viewpoint of the above-described flexural modulus and the like.

A semi-aromatic polyamide resin is a polyamide resin containing an aromatic ring and an aliphatic structure obtained by polycondensation of a dicarboxylic acid component and a diamine component.

The dicarboxylic acid structural unit constituting the semi-aromatic polyamide resin preferably contains a terephthalic acid structural unit. The amount of the terephthalic acid structural unit is preferably 35 to 100 mol%, more preferably 40 to 100 mol%, based on the total 100 mol% of the dicarboxylic acid structural units constituting the semi-aromatic polyamide resin.

The dicarboxylic acid structural units constituting the semi-aromatic polyamide resin preferably include terephthalic acid structural units, isophthalic acid structural units, and aliphatic dicarboxylic acid structural units having 4 to 10 carbon atoms.

When the total of terephthalic acid structural units, isophthalic acid structural units, and aliphatic dicarboxylic acid structural units having 4 to 10 carbon atoms is taken as 100 mol%, the content of terephthalic acid structural units is 35 to 50 mol%. is preferred, and 40 to 50 mol % is more preferred. The isophthalic acid structural unit content is preferably 25 to 40 mol %, more preferably 30 to 40 mol %. The content of aliphatic dicarboxylic acid structural units having 4 to 10 carbon atoms is preferably 15 to 35 mol %, more preferably 20 to 30 mol %.

The molar ratio of terephthalic acid structural units and isophthalic acid structural units is preferably 65/35 to 50/50. On the other hand, the molar ratio of aliphatic dicarboxylic acid structural units to isophthalic acid structural units is preferably 30/70 to 50/50. When the aliphatic dicarboxylic acid structural unit is included in the above range, the semi-aromatic polyamide resin becomes amorphous, and moldability is enhanced. On the other hand, the isophthalic acid structural unit can improve the moldability while maintaining the heat resistance of the semi-aromatic polyamide resin.

The dicarboxylic acid structural units constituting the semi-aromatic polyamide resin may further contain structural units derived from dicarboxylic acids other than the dicarboxylic acids described above, if necessary. Examples of other dicarboxylic acids include 2-methylterephthalic acid, other aromatic dicarboxylic acids such as naphthalenedicarboxylic acid; furandicarboxylic acids such as 2,5-furandicarboxylic acid; 1,4-cyclohexanedicarboxylic acid; Alicyclic dicarboxylic acids such as 3-cyclohexanedicarboxylic acid are included.

The diamine structural unit constituting the semi-aromatic polyamide resin preferably contains an aliphatic diamine structural unit having 4 to 12 carbon atoms. The aliphatic diamine may be a linear aliphatic diamine or a branched aliphatic diamine. Examples of aliphatic diamines include 1,4-diaminobutane, 1,6-diaminohexane, 1,7-diaminoheptane, 1,8-diaminooctane, 1,9-diaminononane, 1,10-diaminodecane, 1 , 11-diaminoundecane, 1,12-diaminododecane and other linear aliphatic diamines; 2-methyl-1,5-diaminopentane, 2-methyl-1,6-diaminohexane, 2-methyl-1,7- Side chains such as diaminoheptane, 2-methyl-1,8-diaminooctane, 2-methyl-1,9-diaminononane, 2-methyl-1,10-diaminodecane, 2-methyl-1,11-diaminoundecane Acyclic aliphatic diamines with The aliphatic diamine is preferably a diamine having 6-9 carbon atoms, more preferably hexamethylenediamine or nonanediamine.

The amount of the aliphatic diamine structural unit is preferably 60 to 100 mol%, more preferably 80 to 100 mol%, based on the total 100 mol% of the diamine structural units constituting the semi-aromatic polyamide resin.

The diamine structural units constituting the semi-aromatic polyamide resin may further contain structural units derived from diamines other than the above-mentioned aliphatic diamines, if necessary. Examples of other diamines include aromatic diamines such as meta-xylenediamine; cycloaliphatic diamines such as 1,4-cyclohexanediamine, 1,3-cyclohexanediamine.

Examples of aromatic polyamide resins include para-amides, meta-amides, and the like.

Examples of (meth)acrylic resins include (meth)acrylic thermoplastic elastomers. The (meth)acrylic thermoplastic elastomer is particularly preferably a block copolymer containing hard blocks and soft blocks with different glass transition temperatures (Tg).

In the block copolymer, the Tg of the hard blocks is preferably higher than the Tg of the soft blocks. The hard block has a Tg of preferably 30 to 200°C, more preferably 60 to 140°C, and particularly preferably 60 to 120°C. The Tg of the soft blocks is preferably -100 to 0°C, more preferably -80 to -20°C, and particularly preferably -40 to -50°C.

In the block copolymer, both the hard blocks and the soft blocks preferably have units derived from alkyl (meth)acrylate (alkyl (meth)acrylate units). In this case, the carbon number (carbon number C1) of the alkyl group contained in the alkyl (meth)acrylate unit of the hard block is less than the carbon number (carbon number C2) of the alkyl group contained in the alkyl (meth)acrylate unit of the soft block. is preferred.

The carbon number (carbon number C1) of the alkyl portion of the alkyl (meth)acrylate unit in the hard block is preferably 1 to 6, more preferably 1 to 3, still more preferably 1 or 2, and particularly preferably 1. Moreover, it is preferable that the (meth)acrylate part is a methacrylate. That is, it is particularly preferred that the hard blocks contain methyl methacrylate units.

The carbon number (carbon number C2) of the alkyl portion of the alkyl (meth)acrylate unit in the soft block should be larger than the carbon number C1. The difference between carbon number C1 and carbon number C2 is preferably 1 or more, more preferably 1 to 6, still more preferably 2 to 5, and particularly preferably 2 to 4.

The (meth)acrylate moiety is preferably acrylate. It is particularly preferred that the soft blocks contain butyl acrylate units.

In the block copolymer, the ratio of the mass of the hard block to the total mass of the hard block and the soft block is selected so that the flexural modulus of the (meth)acrylic thermoplastic elastomer is within the above range, and is 5 to 95 mass. %, more preferably 10 to 90% by mass, particularly preferably 15 to 85% by mass. The total weight of hard blocks and soft blocks is preferably 80 to 100% by weight, more preferably 90 to 100% by weight, relative to the block copolymer.

The mass average molecular weight (Mw) of the (meth)acrylic resin (block copolymer) is appropriately selected according to the flexural modulus, preferably 10,000 to 1,000,000, more preferably 20,000 to 800,000, and particularly preferably 50,000 to 500,000. The mass average molecular weight (Mw) of the hard block is preferably 10,000 to 1,000,000, more preferably 20,000 to 800,000, and particularly preferably 50,000 to 500,000. On the other hand, the weight average molecular weight (Mw) of soft blocks is preferably 10,000 to 1,000,000, more preferably 20,000 to 800,000, and particularly preferably 50,000 to 500,000. The mass average molecular weight (Mw) is a value measured by gel permeation chromatography (GPC) and converted to polymethyl methacrylate.

2. Positioning Member and Stopper Stopper 130 and positioning member 140 are members for adjusting the relative positions of maxillary mouthpiece 110 and mandibular mouthpiece 120 . In this embodiment, the stopper 130 is arranged on the second support 160 of the maxillary mouthpiece 110 . The positioning member 140 is arranged on the first support portion 170 of the mandibular mouthpiece 120 so that its position can be adjusted in the front-rear direction.

The contact between the rear surface 142 of the positioning member 140 and the front surface 132 of the stopper 130 restricts the rearward displacement of the mandibular mouthpiece 120 during occlusion. Posterior displacement of the mandible is restricted.

The positioning member 140 has wings 144 . Wings 144 abut stops 130 when a user wears and bites maxillary mouthpiece 110 and mandibular mouthpiece 120 (see FIGS. 1B and 5).

The wing 144 is not particularly limited as long as its rear surface (rear surface 142 that contacts the stopper 130 ) contacts the front surface 132 of the stopper 130 . In this embodiment, the wings 144 are a pair of left and right plate-like members that project upward from the upper surface of the mandibular mouthpiece 120 when they are engaged (see FIGS. 1 and 3).

The wing 144 is configured so that its position can be adjusted in the front-rear direction by a position adjusting portion 150 attached to the outer surface of the first support portion 170 of the mandibular mouthpiece 120 . Positioning the wings 144 more posteriorly by the positioner 150 causes the mandibular mouthpiece 120 to move more anteriorly during occlusion. A portion of the position adjustment portion 150 is accommodated within the first support portion 170 .

The position adjusting portion 150 includes a first threaded rod 154 having one end supported in the first support portion 170 and a second threaded rod 152 having one end fixed to the wing 144. and a turnbuckle portion 156 inserted into a threaded hole into which the other ends of the first threaded rod 154 and the second threaded rod 152 are respectively screwed (see FIG. 5).

The position adjusting portion 150 rotates the turnbuckle portion 156 by inserting a pin for rotation into a pin hole provided in the turnbuckle portion 156 , so that the turnbuckle portion 156 and the first threaded rod 154 and the second threaded rod 152 are screwed together. By adjusting the total amount, the position of the wing 144 fixed to the second threaded rod 152 is adjusted.

The stopper 130 only needs to be configured to be able to abut against the wings 144 of the positioning member 140. For example, the stopper 130 is supported by the second support portion 160 of the maxillary mouthpiece 110, and protrudes from the user's upper jaw toward the lower jaw. It can be a pair of left and right plate-like members (see FIGS. 1 and 2). However, the stopper 130 does not have to protrude downward from the bottom surface of the maxillary mouthpiece 110 when the mouthpiece 100 is worn.

Stopper 130 and wing 144 preferably have a shape such that stopper 130 does not restrict movement of wing 144 as mandibular mouthpiece 120 moves toward the opening when worn. For example, the stopper 130 may have a ramp 136 that facilitates movement of the mandibular mouthpiece 120 toward the opening (see FIG. 5). Wings 144 may also have ramps 146 that facilitate movement of mandibular mouthpiece 120 toward the opening (see FIG. 1B). In other words, the stopper 130 may include at its forward end a rearwardly sloping surface with its upper end positioned more forward and its lower end positioned more rearward, and the wings 144 at its rearward end: It may include a rearward sloping surface with its upper end positioned more forward and its lower end positioned more rearward. Note that the inclined portion 146 of the wing 144 contacts the stopper 130 during occlusion.

Stopper 130 and wings 144 preferably include a material having a high bending elastic modulus, such as the same high-elasticity material that constitutes second support section 160 and first support section 170 . Stopper 130 and wing 144, which contain a highly elastic material, have sufficient strength to prevent relative displacement of maxillary mouthpiece 110 and mandibular mouthpiece 120 when mouthpiece 100 is in use.

The position adjustment unit 150 is made of, for example, metal materials such as titanium, iron (steel including stainless steel), gold, silver, platinum, cobalt, chromium, and alloys thereof, and a bending elastic modulus measured according to JIS T6501. It is preferably made of a resin material (for example, polycarbonate resin) having a pressure of 1000 MPa or more and 3000 MPa or less.

[Second embodiment]
The mouthpiece according to the second embodiment of the present invention is the same as the mouthpiece according to the first embodiment, except that the second support part 160 and the first support part 170 are configured to cover part of the dentition. 100 is configured in the same manner. Hereinafter, the same reference numerals are given to the same configurations as in the first embodiment, and the description thereof will be omitted.

6A is a schematic perspective view of an upper jaw mouthpiece 110 according to a second embodiment of the present invention, and FIG. 6B is a schematic perspective view of a lower jaw mouthpiece 120 according to a second embodiment of the present invention. be. 7 is a schematic exploded perspective view of the maxillary mouthpiece 110 of FIG. 6A, and FIG. 8 is a schematic exploded perspective view of the mandibular mouthpiece 120 of FIG. 6B.

As shown in FIGS. 6A, 6B, 7A and 7B, the second support 160 consists of a pair of left and right supports 160a and 160b covering part of the maxillary dentition. The first support part 170 is composed of a pair of left and right support parts 170a and 170b covering part of the dentition of the lower jaw. The pair of left and right support portions 160a and 160b are arranged to cover the left and right molar sides of the maxillary dentition (or not cover the incisors), and the pair of left and right support portions 170a and 170b are arranged to cover the dentition of the lower jaw. positioned to cover the left and right molar sides of the (or not cover the incisors).

The shapes of the second support portion 160 and the first support portion 170 may or may not be bilaterally symmetrical.

The lengths of the second support portion 160 and the first support portion 170 in the direction along the tooth row are not particularly limited, and are appropriately selected according to the sizes and positions of the positioning member 140 , the position adjusting portion 150 and the stopper 130 . The lengths of the second support portion 160 and the first support portion 170 in the direction along the tooth row may be the same or different. For example, from the viewpoint of making it easier to stably support the stopper 130, the positioning member 140, and the position adjusting portion 150, it is preferable that the second support portion 160 and the first support portion 170 have the same length in the direction along the tooth row. preferable.

The outer surfaces 184 and 194 of the mounting portions 180 and 190 may have an uneven shape corresponding to the shape of the tooth row throughout (see FIGS. 7 and 8), or the second support portion 160 and the first support portion 170 It is also possible that only the portion covered with is provided with an uneven shape corresponding to the shape of the tooth row, and the other portions do not have an uneven shape. For example, since the portion not covered by the second support portion 160 and the first support portion 170 does not have an uneven shape, the feel on the tongue can be improved.

The thickness of the mounting portions 180 and 190 may or may not be uniform throughout. For example, the thickness of the area covered by the second support 160 and the first support 170 of the mounting parts 180 and 190 (in this embodiment, the front side, for example, the first to third teeth) is the thickness of the second support 160 and the thickness of the region not covered by the first support portion 170 (in this embodiment, the rear side, eg, the fourth to eighth teeth). As a result, the area covered by the second support part 160 and the first support part 170 (the front side in the present embodiment) is less likely to become excessively thick, and the feeling of wearing is further improved.

With the above configuration, the second support part 160 and the first support part 170 are arranged on the left and right parts of the tooth row, and are not arranged in front of the tooth row. can be done.

[Modification]
In the above-described second embodiment, the second supporting portion 160 and the first supporting portion 170 cover a part of the tooth row as shown in FIGS. 7 and 8, but the present invention is not limited thereto. can take various forms.

9A and B are schematic perspective views showing modifications of the mouthpiece 100 according to the second embodiment of the present invention. In the same figure, illustration of the mounting portion 180 of the maxillary mouthpiece 110 is omitted for the sake of convenience. For example, the maxillary mouthpiece 110 may further have a connecting member 200 that connects the pair of left and right support portions 160a and 160b. This makes it easier to handle.

The connecting member 200 may be an arch-shaped member that connects the inner surfaces of the pair of left and right support portions 160a and 160b along the inner surface of the row of teeth (see FIG. 9A), or may It may be a bridging member that bridges (see FIG. 9B). The connecting member 200 may be integrated with the support portions 160a and 160b, respectively, or may be separate members.

The material forming the connecting member 200 is not particularly limited, and may be the same as or different from the material forming the second support portion 160 . When connecting member 200 is a separate member, metal materials such as stainless steel, gold, and silver can be used as the material constituting connecting member 200 . Only one of maxillary mouthpiece 110 and mandibular mouthpiece 120 may have connecting member 200 , or both may have connecting member 200 . From the viewpoint of ease of handling, it is preferable that both the maxillary mouthpiece 110 and the mandibular mouthpiece 120 each have a connecting member 200 .

In addition, in the above-described second embodiment, the second supporting portion 160 and the first supporting portion 170 are provided so as to cover the inner surface, the bottom surface or the upper surface, and the outer surface of the row of teeth, respectively, but the present invention is not limited to this. Instead, it may be a structure having a wire member.

FIG. 10 is a schematic perspective view showing a modification of the mouthpiece 100 according to the second embodiment of the invention. In the figure, only the lower jaw mouthpiece 120 is shown for convenience. The first support portion 170 has a pair of left and right wire members 176 and is configured to be able to support the positioning member 140 and the position adjustment portion 150 (see FIG. 10).

The wire member 176 can have a shape that surrounds the tooth. Examples of wire member 176 include ball clasps, C-clasp, and the like. The pair of left and right wire members 176 may be connected by a connecting member (not shown) or the like, or may be fixed by a resin floor (not shown) or the like arranged on the lingual side.

Also, the contact portion of the mounting portion 190 with the pair of left and right wire members 176 may be provided with recesses (not shown) or friction surfaces corresponding to the pair of left and right wire members 176 . This makes it easier to attach and fix the mounting portion 190 to the wire member 176 .

In addition, in the first and second embodiments, the stopper 130 is arranged on the upper jaw side and the positioning member 140 (such as the wing 144) is arranged on the lower jaw side. A stopper 130 may be arranged.

Further, in the first embodiment, both the second support part 160 and the first support part 170 are provided so as to cover the entire tooth row, and in the second embodiment, the second support part 160 and the first Although an example in which both of the support portions 170 are provided so as to cover only a part of the left and right rows of teeth has been shown, one of the second support portion 160 and the first support portion 170 is provided so as to cover the entire row of teeth. , the other may be provided so as to cover only part of the left and right tooth rows.

Further, in the first and second embodiments described above, the mounting portions 180 and 190 are detachably attached to the second support portion 160 and the first support portion 170, respectively. The mounting portion 180 or 190 may be detachably attached to only one of the first support portions 170 . For example, the second support portion 160 may be configured to detachably attach the mounting portion 180, and the first support portion 170 may be configured to be directly attachable to the dentition.

According to the mouthpiece of the present invention, it is possible to limit the backward displacement of the user's mandible, which is very effective in preventing and treating sleep apnea syndrome. Moreover, the mouthpiece of the present invention is more comfortable to wear than conventional mouthpieces, and is less likely to be damaged or deformed. Therefore, it can be used for the prevention and treatment of sleep apnea syndrome, the prevention and treatment of temporomandibular disorders, the suppression of bruxism, and the like.

REFERENCE SIGNS LIST 100 Mouthpiece 110 Maxillary Mouthpiece 120 Mandibular Mouthpiece 130 Stopper 132 Stopper Front Surface 136 Stopper Inclined Section 140 Positioning Member 144 Wing 142 Positioning Member (or Wing) Rear Surface 146 Wing Inclined Section 150 Position Adjusting Section 152 Second screw rod 154 First screw rod 156 Turnbuckle part 160 Second support part 170 First support part 160a, 160b, 170a, 170b Support parts 162, 172 Recesses 162a, 172a Outer inner wall surface 162b, 172b Inner inner wall surface 162c bottom surface (on the inner wall surface of the recess) 172c top surface (on the inner wall surface of the recess) 184c bottom surface (on the outer surface of the mounting portion) 194c top surface (on the outer surface of the mounting portion) 164, 174 fixing portion 176 wire member 180, 190 attachment Parts 182, 192 Tooth-row molding parts 184, 194 Outer surfaces 184a, 194a Outer surfaces 184b, 194b Inner surfaces 200 Connecting member

Claims (12)

a maxillary mouthpiece and a mandibular mouthpiece;
a positioning member arranged in one of the maxillary and mandibular mouthpieces, the position of which can be adjusted in the front-rear direction; and a first supporting portion that supports the positioning member;
a stopper disposed on the other mouthpiece of the maxillary and mandibular mouthpieces, the stopper abutting against the positioning member to restrict rearward displacement of the mandibular mouthpiece; and a second support supporting the stopper;
has
At least one of the first support portion and the second support portion is detachably attached with a mounting portion to be mounted on the row of teeth,
mouthpiece. Attachment parts to be attached to the row of teeth are detachably attached to both the first support part and the second support part,
A mouthpiece according to claim 1 . The bending elastic modulus of the mounting portion is lower than the bending elastic moduli of the first support portion and the second support portion.
A mouthpiece according to claim 1 or 2. The bending elastic modulus of the mounting portion is 50 to 500 MPa,
A mouthpiece according to claim 3. The first support part or the second support part has a fixing part that fixes the mounting part,
A mouthpiece according to any one of claims 1-4. A contact portion of the first support portion or the second support portion with the mounting portion has an uneven shape complementary to a contact portion of the mounting portion with the first support portion or the second support portion. ,
A mouthpiece according to any one of claims 1-5. The mounting portion is provided so as to cover the entire dentition,
A mouthpiece according to any one of claims 1-6. The first support part or the second support part is provided so as to cover the entire tooth row,
Mouthpiece according to any one of claims 1-7. At least one of the first support portion and the second support portion comprises a pair of left and right support portions covering part of the tooth row,
Mouthpiece according to any one of claims 1-7. further comprising a connecting member that connects the pair of left and right support portions,
A mouthpiece according to claim 9 . The first support part and the second support part each have a pair of left and right wire members,
Mouthpiece according to any one of claims 1-7. Having the mounting part detachably attached to at least one of the first support part and the second support part and mounted on the row of teeth,
Mouthpiece according to any one of claims 1-11.

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