JP2018183246A - Mouthpiece, and production method of mouthpiece - Google Patents

Mouthpiece, and production method of mouthpiece Download PDF

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JP2018183246A
JP2018183246A JP2017085034A JP2017085034A JP2018183246A JP 2018183246 A JP2018183246 A JP 2018183246A JP 2017085034 A JP2017085034 A JP 2017085034A JP 2017085034 A JP2017085034 A JP 2017085034A JP 2018183246 A JP2018183246 A JP 2018183246A
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resin
mouthpiece
shape holding
shape
holding portion
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芳伸 水野
Yoshinobu Mizuno
芳伸 水野
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ECO A CO Ltd
ECO-A CO Ltd
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ECO A CO Ltd
ECO-A CO Ltd
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Abstract

PROBLEM TO BE SOLVED: To provide a mouthpiece having a comfortable fitting feeling in an oral cavity, and having an optimum two-layer structure.SOLUTION: A mouthpiece is constituted of a shape retention part 1 made of a first resin, and formed in a shape along a tooth row, and a covering part 2 made of a second resin having a lower softening temperature than the first resin, having a softening temperature of 40°C or higher and 100°C or lower, and including the shape retention part 1.SELECTED DRAWING: Figure 1

Description

本発明は、マウスピースおよびマウスピースの製造方法に関するものである。   The present invention relates to a mouthpiece and a method for manufacturing the mouthpiece.

従来、熱湯軟化式のマウスピースは、その本体を熱湯に浸して軟化させ口腔内に挿入し噛み込むことで口蓋側面や舌側面と密着させその機能を発揮する。このようなマウスピースとしては、マウスピース全体が硬い樹脂と柔らかい樹脂の二層構造で構成されているものがある（例えば、特許文献１）。   2. Description of the Related Art Conventionally, a hot water softening mouthpiece is soaked in hot water that it is softened, inserted into the oral cavity and chewed, thereby bringing it into close contact with the side surface of the palate and the side of the tongue and exerting its function. As such a mouthpiece, there is one in which the entire mouthpiece has a two-layer structure of a hard resin and a soft resin (for example, Patent Document 1).

特開２００５−１１８５１３JP-A-2005-118513

しかしながら、二層構造のものは異なる樹脂を接合するために表面積を大きくとる必要がありその結果大きくまた硬くなってしまう。そのため口腔内に入れ難く装着感が著しく悪くなる。その結果咬合面が安定せず、深く噛めないことがある。更には使用時に咬合面の噛み込みで、へたれが生じるなどの問題もある。   However, the two-layer structure needs to have a large surface area for joining different resins, and as a result, it becomes large and hard. Therefore, it is difficult to put in the oral cavity, and the wearing feeling is remarkably deteriorated. As a result, the occlusal surface is not stable and may not be chewed deeply. Furthermore, there is a problem that sagging occurs due to biting of the occlusal surface during use.

そこで本発明は以上のような従来技術の問題を鑑みてなされたもので、口腔内での装着感も快適でありかつ、最適な二層構造を有するマウスピースを提供することを目的としている。   Therefore, the present invention has been made in view of the above-described problems of the prior art, and an object of the present invention is to provide a mouthpiece that is comfortable in the oral cavity and has an optimal two-layer structure.

上記目的を達成するために、本発明のマウスピースは、第１の樹脂からなり、歯列に沿う形状に形成された形態保持部と、前記第１の樹脂より軟化温度が低く、かつ４０℃以上１００℃以下の軟化温度を有する第２の樹脂からなり、前記形態保持部を内包する被覆部と、を具備することを特徴とする。   In order to achieve the above object, the mouthpiece of the present invention is made of a first resin, and has a shape holding portion formed in a shape along the dentition, a softening temperature lower than that of the first resin, and 40 ° C. It is made of a second resin having a softening temperature of 100 ° C. or lower and includes a covering portion that encloses the shape holding portion.

この場合、前記形態保持部は、唇側面側および頬側面側を支持する外壁支持部と、口蓋側面側又は舌側面側を支持する内壁支持部と、前記外壁支持部と前記内壁支持部を連結する底面支持部とからなり、前記底面支持部の咬合面に対応する部分の少なくとも一部に隙間を有するように形成すれば良い。   In this case, the form holding portion connects the outer wall support portion supporting the lip side surface side and the cheek side surface side, the inner wall support portion supporting the palate side surface side or the lingual side surface side, and the outer wall support portion and the inner wall support portion. What is necessary is just to form so that it may have a clearance gap in at least one part of the part corresponding to the occlusal surface of the said bottom face support part.

また、前記隙間は、前記第２の樹脂が充填すれば良い。   The gap may be filled with the second resin.

また、前記形態保持部は、インサート成形用の位置決め穴を有していても良い。   Moreover, the said shape holding | maintenance part may have a positioning hole for insert molding.

また、前記第２の樹脂は、ポリオレフィン系エラストマー又はエチレンビニルアセテートを用いることができる。   The second resin can be a polyolefin elastomer or ethylene vinyl acetate.

また、前記第１の樹脂は、ポリエチレンテレフタレートを用いることができる。   Further, polyethylene terephthalate can be used as the first resin.

また、前記形態保持部は、唇小帯に対応する部分に凹状の溝を有する方が好ましい。   Further, it is preferable that the shape holding portion has a concave groove in a portion corresponding to the lip small band.

また、本発明のマウスピースの製造方法は、第１の樹脂からなり、歯列に沿う形状に形成された形態保持部と、第２の樹脂からなる被覆部と、を具備するマウスピースの製造方法であって、前記形態保持部に形成されたインサート成形用の位置決め穴で当該形態保持部を金型内に支持し、前記第１の樹脂より軟化温度が低く、かつ４０℃以上１００℃以下の軟化温度を有する前記第２の樹脂を前記金型内に注入して、前記形態保持部を内包する被覆部をインサート成形により形成することを特徴とする。   Moreover, the manufacturing method of the mouthpiece of this invention consists of 1st resin, and manufacture of the mouthpiece which comprises the form holding part formed in the shape along a dentition, and the coating | coated part which consists of 2nd resin. In the method, the shape holding portion is supported in the mold by the insert molding positioning hole formed in the shape holding portion, the softening temperature is lower than that of the first resin, and 40 ° C. or more and 100 ° C. or less. The second resin having the softening temperature is injected into the mold, and the covering portion including the shape holding portion is formed by insert molding.

本発明のマウスピースは、形態保持部を被覆部に内包するので、硬い樹脂からなる形態保持部を従来のマウスピースより小さくできる。これにより、マウスピースを口腔内に入れやすくすることができる。   Since the mouthpiece of the present invention encloses the shape holding portion in the covering portion, the shape holding portion made of hard resin can be made smaller than the conventional mouthpiece. Thereby, it can be made easy to put the mouthpiece into the oral cavity.

また、形態保持部の咬合面に対応する部分に隙間を設ければ、形態保持部を曲げやすく、マウスピースを更に口腔内に入れやすくすることができる。また、咬合面で深く噛み込めると共に、噛み込みによるへたれも防止することができる。   Moreover, if a clearance gap is provided in the part corresponding to the occlusal surface of a form holding part, a shape holding part can be bent easily and it can make it easier to put a mouthpiece in an oral cavity. In addition, it is possible to deeply bite at the occlusal surface and to prevent sagging due to biting.

本発明のマウスピースを舌側面側から見た斜視図である。It is the perspective view which looked at the mouthpiece of this invention from the tongue side surface side. 本発明のマウスピースを唇側面側から見た斜視図である。It is the perspective view which looked at the mouthpiece of the present invention from the labial side.

以下に、図１、図２を用いて、本発明のマウスピースを説明する。本発明のマウスピースは、第１の樹脂からなる形態保持部１と第２の樹脂からなる被覆部２とで主に構成される。   The mouthpiece of the present invention will be described below with reference to FIGS. The mouthpiece of the present invention is mainly composed of a shape holding portion 1 made of a first resin and a covering portion 2 made of a second resin.

形態保持部１は、マウスピースの形状を保持するためのもので、歯列に沿う略Ｕ字状に形成される。具体的には、形態保持部１は、唇側面側および頬側面側を支持する外壁支持部11と、上顎用のマウスピースの口蓋側面側又は下顎用のマウスピースの舌側面側を支持する内壁支持部12と、外壁支持部11と内壁支持部12を連結する底面支持部13とからなる。外壁支持部11の唇側面側は、前歯を保護するために、内壁支持部12の口蓋側面側や舌側面側より大きく形成しても良い。当該形態保持部１は、マウスピースの大きさを左右し、口腔内への入れやすさ等が変わるため、マウスピースの形態を保持できる範囲で、歯列に合わせて可能な限り小さく形成される方が好ましい。   The shape holding part 1 is for holding the shape of the mouthpiece, and is formed in a substantially U shape along the dentition. Specifically, the shape holding unit 1 includes an outer wall support unit 11 that supports the lip side surface and the cheek side surface side, and an inner wall that supports the palate side surface side of the upper jaw mouthpiece or the tongue side surface side of the lower jaw mouthpiece. The support unit 12 includes an outer wall support unit 11 and a bottom surface support unit 13 that connects the inner wall support unit 12. The lip side surface side of the outer wall support portion 11 may be formed larger than the palate side surface side or the tongue side surface side of the inner wall support portion 12 in order to protect the front teeth. Since the shape holding part 1 affects the size of the mouthpiece and changes the ease of insertion into the mouth, etc., the shape holding part 1 is formed as small as possible in accordance with the dentition as long as the shape of the mouthpiece can be held. Is preferred.

また、底面支持部13の咬合面に対応する部分には、少なくとも一部に隙間14を有する方が好ましい。これにより、当該隙間14で歯を深く噛み込むことができるので、使用感が良く、また、噛み込みによるへたれを防止することもできる。また、当該隙間14をＵ字状に形成することにより、形態保持部１の両端を曲げやすくすることができるので、マウスピースを更に口腔内に入れやすくすることができる。   Further, it is preferable that the portion corresponding to the occlusal surface of the bottom surface support portion 13 has a gap 14 at least partially. Accordingly, since the teeth can be deeply bitten by the gap 14, the feeling of use is good and it is possible to prevent sagging due to biting. Moreover, since the both ends of the shape holding | maintenance part 1 can be bent easily by forming the said clearance gap 14 in a U shape, it can make it easier to put a mouthpiece in an oral cavity.

また、形態保持部１には、インサート成形時に金型内に形態保持部１の位置決めを行うための位置決め穴15，16を設けても良い。位置決め穴の位置は、形態保持部１を金型内に位置決めできればどこに配置しても良く、例えば、図１に示すように、外壁支持部11の唇側面側（位置決め穴15）や、底面支持部13側（位置決め穴16）等に設ければ良い。位置決め穴の形状は、角丸矩形状や円状、楕円状等、成形条件に合わせて適宜設計すれば良い。   Further, the shape holding portion 1 may be provided with positioning holes 15 and 16 for positioning the shape holding portion 1 in the mold at the time of insert molding. The position of the positioning hole may be located anywhere as long as the shape holding portion 1 can be positioned in the mold. For example, as shown in FIG. 1, the lip side surface (positioning hole 15) of the outer wall support portion 11 and the bottom support What is necessary is just to provide in the part 13 side (positioning hole 16) etc. The shape of the positioning hole may be appropriately designed according to the molding conditions such as a rounded rectangular shape, a circular shape, an elliptical shape, or the like.

また、形態保持部１は、マウスピースの使用時に、上唇小帯または下唇小帯との干渉を避けるため、唇小帯に対応する部分に凹状の溝17を有する方が好ましい。   In addition, it is preferable that the shape holding unit 1 has a concave groove 17 in a portion corresponding to the lip band to avoid interference with the upper lip band or the lower lip band when the mouthpiece is used.

形態保持部１に用いられる第１の樹脂は、被覆部２に用いられる第２の樹脂よりも軟化温度が十分に高いものが良く、好ましくは、軟化温度が１００℃を超えるものが良い。また、第１の樹脂は、第２の樹脂よりも高い硬度を有するものが良く、好ましくは、マウスピースの使用時において、強く咬合した際にも変形をせずマウスピースとしての形状を保持できるものが良い。また、第１の樹脂は、毒性のないものが用いられることは言うまでもない。このような樹脂としては、具体的には、ポリエチレンテレフタレート（ＰＥＴ）等を用いることができる。   The first resin used in the shape holding unit 1 should have a sufficiently higher softening temperature than the second resin used in the covering unit 2, and preferably has a softening temperature exceeding 100 ° C. Further, the first resin should have a higher hardness than the second resin, and preferably, when the mouthpiece is used, it can retain its shape as a mouthpiece without being deformed even when it is strongly bitten. Things are good. Needless to say, the first resin is non-toxic. As such a resin, specifically, polyethylene terephthalate (PET) or the like can be used.

被覆部２は、前記形態保持部１を内包し、口腔内や歯牙を保護するためのものである。ここで内包とは、形態保持部１の唇や頬、舌等の口腔側と歯牙側の両方が被覆されていることを意味するが、口腔内や歯牙を保護できれば完全に被覆されている必要はない。例えば、形態保持部１に形成されたインサート成形用の位置決め穴15，16は、インサート成形時に支持され、第２の樹脂で被覆できない部分であるため、その目的上、被覆部２に覆われていなくても構わない。   The coating | coated part 2 encloses the said shape holding | maintenance part 1, and protects the inside of a mouth and a tooth. Here, the inclusion means that both the oral cavity side and the tooth side such as the lips, cheeks, and tongues of the shape holding unit 1 are covered, but if the oral cavity and the tooth can be protected, they must be completely covered. There is no. For example, the positioning holes 15 and 16 for insert molding formed in the shape holding portion 1 are portions that are supported at the time of insert molding and cannot be covered with the second resin, and are therefore covered with the covering portion 2 for that purpose. It doesn't matter.

第２の樹脂は、衝撃等を吸収し、口腔内や歯牙を保護できる程度に柔らかいものが良く、弾性又は粘弾性を有するものが好ましい。また、被覆部２は、第１の樹脂より軟化温度が低く、かつ４０℃以上１００℃以下の軟化温度を有する第２の樹脂からなる。これにより、第２の樹脂より高い温度の熱湯によって第２の樹脂を軟化させることができるので、使用者の口腔内や歯牙に合わせて被覆部２を変形させることができる。また、第２の樹脂は、毒性のないものが用いられることは言うまでもない。このような樹脂としては、具体的には、ポリオレフィン系エラストマーやエチレンビニルアセテート（ＥＶＡ）等の低融点の熱可塑性樹脂を用いることができる。   The second resin is preferably soft enough to absorb impact and the like and protect the oral cavity and teeth, and preferably has elasticity or viscoelasticity. The covering portion 2 is made of a second resin having a softening temperature lower than that of the first resin and having a softening temperature of 40 ° C. or higher and 100 ° C. or lower. Thereby, since 2nd resin can be softened with the hot water of temperature higher than 2nd resin, the coating | coated part 2 can be deform | transformed according to a user's intraoral area and a tooth. Needless to say, non-toxic resin is used as the second resin. As such a resin, specifically, a low melting thermoplastic resin such as a polyolefin-based elastomer or ethylene vinyl acetate (EVA) can be used.

被覆部２は、温度等によって変形可能であるが、マウスピース全体の大きさによっては、口腔内への入れやすさや使用感等が変わるため、口腔内の状態に合わせて適度な厚みにするのが好ましい。   The covering portion 2 can be deformed depending on the temperature or the like, but depending on the size of the entire mouthpiece, the ease of insertion into the oral cavity, the feeling of use, etc. will change, so the thickness should be appropriate for the oral cavity. Is preferred.

また、形態保持部１の底面支持部13に上述した咬合用の隙間14が形成されている場合には、当該隙間14は、咬合面で深くかみ合わせることができる厚みで第２の樹脂が充填されている方が好ましいが、ある程度の隙間14を空けたままでも構わない。   Further, when the above-described occlusal gap 14 is formed in the bottom surface support part 13 of the shape holding part 1, the gap 14 is filled with the second resin with a thickness that can be deeply engaged with the occlusal surface. However, it is possible to leave some gaps 14 between them.

また、形態保持部１に上述した唇小帯用の凹状の溝が形成されている場合には、当該溝に合わせて被覆部２にも凹状の溝を形成しても良い。   Moreover, when the concave groove | channel for the above-mentioned lip small band is formed in the form holding part 1, you may form a concave groove also in the coating | coated part 2 according to the said groove | channel.

次に、本発明のマウスピースの使用方法について説明する。   Next, the usage method of the mouthpiece of this invention is demonstrated.

まず、上述した本発明のマウスピースを、第２の樹脂の軟化温度よりも高く、第１の樹脂の軟化温度よりも低い温度に加熱する。加熱はどのように行っても良いが、例えば、第２の樹脂の軟化温度よりも高く、第１の樹脂の軟化温度よりも低い温度に調節した熱湯に浸漬したり、恒温室に置くことで加熱することができる。   First, the mouthpiece of the present invention described above is heated to a temperature higher than the softening temperature of the second resin and lower than the softening temperature of the first resin. Heating may be performed in any way, for example, by immersing in hot water adjusted to a temperature higher than the softening temperature of the second resin and lower than the softening temperature of the first resin, or by placing it in a temperature-controlled room Can be heated.

加熱により、被覆部２の樹脂が十分に軟化していることを確認した後、火傷に注意しつつ、口腔内に装着し軽く噛んで被覆部２の形状を変形させて調整する。   After confirming that the resin of the covering portion 2 is sufficiently softened by heating, the shape of the covering portion 2 is deformed and adjusted by wearing it in the oral cavity and carefully biting it while paying attention to burns.

マウスピースの形状が整ったら、口に水を含むか、自然冷却によって、第２の樹脂をその軟化温度よりも低くなるように冷却して硬化させる。   When the shape of the mouthpiece is ready, the second resin is cooled and cured so as to be lower than its softening temperature by containing water in the mouth or by natural cooling.

その後、このまま使用しても良いし、口腔内から取り出して、必要な時まで保管しても良い。   Thereafter, it may be used as it is, or may be taken out from the oral cavity and stored until necessary.

なお、すぐに使用する必要がない場合には、頬の外から指で押し、樹脂が少し硬くなったことそして、形状調整が出来ていることを確認した段階で、口腔内から取り出しても良い。取り出したマウスピースは、室温にて自然冷却するか、常温の水に全体を浸漬して強制的に冷却を行う。送風機等での強制空冷でもよい。   If it is not necessary to use immediately, the finger may be pushed out of the cheek and removed from the mouth after confirming that the resin has become a little hard and that the shape has been adjusted. . The taken out mouthpiece is naturally cooled at room temperature or is forcibly cooled by immersing the whole in normal temperature water. Forced air cooling with a blower or the like may be used.

次に、本発明のマウスピースの製造方法について説明する。本発明のマウスピースの製造方法は、少なくとも形態保持部１と、被覆部２と、で構成されるマウスピースの製造方法である。   Next, the manufacturing method of the mouthpiece of this invention is demonstrated. The manufacturing method of the mouthpiece of this invention is a manufacturing method of the mouthpiece comprised at least with the form holding | maintenance part 1 and the coating | coated part 2. FIG.

まず、上述したように、第１の樹脂からなり歯列に沿う形状に形成された形態保持部１を準備する。当該形態保持部１には、被覆部２をインサート成形する際に、金型内に形態保持部１の位置決めを行うための位置決め穴を設けておく。当該形態保持部１の形成は、どのような方法を用いても良いが、例えば、上述した形態保持部１と略同形の凹部を有し、当該形態保持部１を形成可能な金型にポリエチレンテレフタレート（ＰＥＴ）等の第１の樹脂を注入する射出成形等、従来から知られている方法を用いれば良い。   First, as described above, the shape holding unit 1 made of the first resin and formed in a shape along the dentition is prepared. The shape holding portion 1 is provided with a positioning hole for positioning the shape holding portion 1 in the mold when the covering portion 2 is insert-molded. Any method may be used to form the shape holding unit 1. For example, the shape holding unit 1 has a recess substantially the same shape as the above-described shape holding unit 1, and polyethylene is used as a mold that can form the shape holding unit 1. A conventionally known method such as injection molding in which a first resin such as terephthalate (PET) is injected may be used.

次に、形態保持部１に形成されたインサート成形用の位置決め穴を用いて、当該形態保持部１を金型内に支持する。   Next, the shape holding part 1 is supported in the mold using the insert molding positioning holes formed in the form holding part 1.

次に、４０℃以上１００℃以下の軟化温度を有する第２の樹脂を当該軟化温度以上に加熱して金型内に注入し、形態保持部１を内包するように被覆部２をインサート成形により形成する。第２の樹脂としては、例えば、ポリオレフィン系エラストマーやエチレンビニルアセテート（ＥＶＡ）等の低融点の熱可塑性樹脂を用いることができる。   Next, the second resin having a softening temperature of 40 ° C. or higher and 100 ° C. or lower is heated to the softening temperature or higher and poured into the mold, and the covering portion 2 is formed by insert molding so as to enclose the shape holding portion 1. Form. As the second resin, for example, a thermoplastic resin having a low melting point such as a polyolefin-based elastomer or ethylene vinyl acetate (EVA) can be used.

最後に、金型内を第２の樹脂の軟化温度未満に冷却し、第２の樹脂を固化させて、金型内から取り出す。   Finally, the inside of the mold is cooled to below the softening temperature of the second resin, the second resin is solidified, and taken out from the mold.

１：形態保持部
２：被覆部
11：外壁支持部
12：内壁支持部
13：底面支持部
14：隙間
15：位置決め穴
16：位置決め穴
17：溝 1: Form holding part 2: Covering part
11: Outer wall support
12: Inner wall support
13: Bottom support
14: Clearance
15: Positioning hole
16: Positioning hole
17: Groove

Claims (8)

第１の樹脂からなり、歯列に沿う形状に形成された形態保持部と、
前記第１の樹脂より軟化温度が低く、かつ４０℃以上１００℃以下の軟化温度を有する第２の樹脂からなり、前記形態保持部を内包する被覆部と、
を具備することを特徴とするマウスピース。 A shape holding portion made of a first resin and formed in a shape along the dentition,
A second resin having a softening temperature lower than that of the first resin and having a softening temperature of 40 ° C. or higher and 100 ° C. or lower; and a covering portion including the shape holding portion;
The mouthpiece characterized by comprising. 前記形態保持部は、唇側面側および頬側面側を支持する外壁支持部と、口蓋側面側又は舌側面側を支持する内壁支持部と、前記外壁支持部と前記内壁支持部を連結する底面支持部とからなり、前記底面支持部の咬合面に対応する部分の少なくとも一部に隙間を有することを特徴とする請求項１記載のマウスピース。   The shape holding portion includes an outer wall support portion that supports the lip side surface side and cheek side surface side, an inner wall support portion that supports the palate side surface side or the tongue side surface side, and a bottom surface support that connects the outer wall support portion and the inner wall support portion. The mouthpiece according to claim 1, further comprising a gap in at least a part of a portion corresponding to the occlusal surface of the bottom surface support portion. 前記隙間は、前記第２の樹脂が充填されていることを特徴とする請求項２記載のマウスピース。   The mouthpiece according to claim 2, wherein the gap is filled with the second resin. 前記形態保持部は、インサート成形用の位置決め穴を有することを特徴とする請求項１ないし３のいずれかに記載のマウスピース。   The mouthpiece according to any one of claims 1 to 3, wherein the shape holding portion has a positioning hole for insert molding. 前記第２の樹脂は、ポリオレフィン系エラストマー又はエチレンビニルアセテートであることを特徴とする請求項１ないし４のいずれかに記載のマウスピース。   The mouthpiece according to any one of claims 1 to 4, wherein the second resin is a polyolefin-based elastomer or ethylene vinyl acetate. 前記第１の樹脂は、ポリエチレンテレフタレートであることを特徴とする請求項１ないし５のいずれかに記載のマウスピース。   The mouthpiece according to any one of claims 1 to 5, wherein the first resin is polyethylene terephthalate. 前記形態保持部は、唇小帯に対応する部分に凹状の溝を有することを特徴とする請求項１ないし３のいずれかに記載のマウスピース。   The mouthpiece according to any one of claims 1 to 3, wherein the shape holding portion has a concave groove in a portion corresponding to the lip zonule. 第１の樹脂からなり、歯列に沿う形状に形成された形態保持部と、第２の樹脂からなる被覆部と、を具備するマウスピースの製造方法であって、
前記形態保持部に形成されたインサート成形用の位置決め穴で当該形態保持部を金型内に支持し、前記第１の樹脂より軟化温度が低く、かつ４０℃以上１００℃以下の軟化温度を有する前記第２の樹脂を前記金型内に注入して、前記形態保持部を内包する被覆部をインサート成形により形成することを特徴とするマウスピースの製造方法。 A manufacturing method of a mouthpiece comprising a first resin and a shape holding part formed in a shape along the dentition, and a covering part made of a second resin,
The shape holding portion is supported in the mold by a positioning hole for insert molding formed in the shape holding portion, has a softening temperature lower than that of the first resin, and a softening temperature of 40 ° C. or higher and 100 ° C. or lower. A manufacturing method of a mouthpiece, wherein the second resin is injected into the mold, and a covering portion including the shape holding portion is formed by insert molding.
JP2017085034A 2017-04-24 2017-04-24 Mouthpiece, and production method of mouthpiece Pending JP2018183246A (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP7508601B2 (en) 2020-06-24 2024-07-01 ピースフルスリープ・ピーティーワイ・リミテッド Mouthguard

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP7508601B2 (en) 2020-06-24 2024-07-01 ピースフルスリープ・ピーティーワイ・リミテッド Mouthguard

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