JPH0428359A - 歯列矯正用マウスピースの製造法 - Google Patents

歯列矯正用マウスピースの製造法

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Publication number
JPH0428359A
JPH0428359A JP13498490A JP13498490A JPH0428359A JP H0428359 A JPH0428359 A JP H0428359A JP 13498490 A JP13498490 A JP 13498490A JP 13498490 A JP13498490 A JP 13498490A JP H0428359 A JPH0428359 A JP H0428359A
Authority
JP
Japan
Prior art keywords
model
mouthpiece
teeth
plaster
teeth set
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
JP13498490A
Other languages
English (en)
Inventor
Takeo Shimada
武雄 島田
Shoichi Chihara
千原 彰一
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Mitsubishi Chemical Corp
Original Assignee
Mitsubishi Petrochemical Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Mitsubishi Petrochemical Co Ltd filed Critical Mitsubishi Petrochemical Co Ltd
Priority to JP13498490A priority Critical patent/JPH0428359A/ja
Publication of JPH0428359A publication Critical patent/JPH0428359A/ja
Pending legal-status Critical Current

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  • Dental Tools And Instruments Or Auxiliary Dental Instruments (AREA)

Abstract

(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。

Description

【発明の詳細な説明】 〔発明の背景〕 〈産業上の利用分野〉 本発明は、歯牙に傷を付けることなく簡易に歯列の矯正
を行なうことができる歯列矯正用マウスピースの製造法
に関する。
〈従来の技術〉 従来、歯列の矯正は、一般に矯正を行なう歯牙に力を加
えるために、他の正常な歯牙にワイヤー掛のための支具
を装着して行なう方法が採用されている。
〈発明が解決しようとする課題〉 しかし、このような方法では、他の正常な歯牙をも傷を
付は易いばかりか、一部の歯牙にのみ特に力が加わり易
いことから、ワイヤー掛された歯牙が痛むといった欠点
があった。
〔発明の概要〕
く要旨〉 本発明者らは上記課題を解決するために鋭意研究を重ね
た結果、従来の歯列矯正方法と全く異なる特殊なマウス
ピースを用いることによって他の正常な歯牙を傷付ける
こと無く、歯牙に加える力を歯牙全体でこれを保持して
、矯正する歯牙のみに特に力を加えることができるので
、従来の矯正法と異なり簡易に矯正を行なうことができ
るとの知見を得て本発明を完成するに至った。
すなわち、本発明の歯列矯正用マウスピースの製造法は
、歯列不正患者より採取した歯列石膏模型を修正して歯
列矯正用石膏模型を製作し、該歯列矯正用石膏模型に軟
化した熱可塑性重合体シートを密着した後同化させて取
り外すことを特徴とするものである。
く効果〉 本発明の歯列矯正用マウスピースの製造法によって製作
された歯列矯正用マウスピースは、軟質材料を用いてい
るので装着が容易であり、かつ歯牙全体に覆せて使用す
るので特定な歯牙を痛めることもない。また、はずして
歯牙や口腔の中を清めることも容易に出来るといった著
しい効果を奏する。
〔発明の詳細な説明〕
CI〕歯列矯正用石膏模型の製作 (1)患者の歯列模型の製作工程 本発明の歯列矯正用マウスピースの製造法においては、
先ず、歯列矯正を行なう患者の口蓋より、印象利を用い
て凹型の歯列模型を製作し、この凹型の歯列模型に石膏
を流し込んで患者の正確な歯列の凸型の歯列石膏模型を
製作する。
この時凹型の歯列模型の作成に使用する印象祠は、一般
に歯科分野で用いられるものが使用でき、ンリコーン印
象材、寒天印象材、アルシネ−1・印象材等が用いられ
る。また、凸型の歯列石膏模型に使用する石膏は、硬質
石膏、又は超硬質石膏を用いるのがよい。
(2)歯列矯正用石膏模型の製作工程 上記方法によって製作された患者の歯列の凸型の石膏模
型をベースにして、最終的に、あるいは段階的に矯正さ
れるべき形にまで修正を加えて歯列矯正用石膏−模型を
製作する。
このような歯列矯正用石膏模型は、患者の歯列石膏模型
の矯正する歯牙の矯正するべき方向の力を加えたくない
部所に肉盛りし、その反対側の力を加えたい部所を切削
して修正を行なう。
切削に使用する道具は、石膏を切削することが出来れば
何を使用してもよいが、一般に技工用バーやハンドピー
スを用いて行なわれる。また肉盛りはコンポジットレジ
ンやエポキシ樹脂等で行う。
又肉盛りに使用する材料もその後の操作に耐えるだけの
接着強度及び引張り強度があれば、どのようなものを使
ってもよい。
〔■〕歯列矯正用マウスピースの製作 (1)熱可塑性重合体シートの熱成形 前記方法によって製作された歯列矯正用石膏模型に加熱
によって軟化されたシート状の熱可塑性重合体を貼着し
、さらに熱成形にて密着させて歯列矯正用石膏模型の歯
列を正確に転写する。
ここで用いる熱可塑性重合体は、エラストマ特性及び強
度の優れたもの、更には装着感の優れたものを用いる必
要がある。
上記の条件をE足させる為に、使用する熱可塑性重合体
は、曲げ弾性率(ASTM  D747)が800 k
g/cm以下、好ましくは50〜500kg/cmのも
のであることが望ましい。
このような条件を満足する材料としては、エチレン・酢
酸ビニル共重合体、エチレン・アクリル酸エステル共重
合体、エチレン・メタアクリル酸エステル共重合体、エ
チレンやα−オレフィン共重合体、ポリエチレン等のエ
チレン系樹脂のほかエチレン・プロピレンエラストマー
、エチレン・プロピレン・ジエン化合物系エラストマー
、スチレン・ブタジェン系(水添物も含む)エラストマ
、ポリエステルエラストマー、ウレタンエラストマー、
ポリブタジェン等がある。
これらの中でもエチレン系樹脂(特にエチレン・酢酸ビ
ニル共重合体、エチレン・α−オレフィン共重合体、ポ
リエチレン)、スチレン・ブタジェン系エラストマーを
用いることが好ましい。
これらは、単独で用いても或いは他の重合体と混合した
り、積層して用いても、また、各種の添加剤を添加して
用いてもよい。
このような添加剤としては、顔料、老化防止剤、成形改
良剤、安定剤、紫外線防止剤、酸化防止剤、摩耗改良剤
等がある。
また、該熱可塑性重合体シートの厚みは、一般に0.2
5〜3 mm s好ましくは0.3〜1.5++++n
特に0.3〜]、 +n+nであることか好ましい。
前記熱成形の具体的な成形法としては、真空成形や圧空
成形を行なうことが好ましいが、プロ成形やスラッシュ
モールド成形を行なうこともてきる。
該熟成形の成形条件は熱成形の方法及び熱可塑性重合体
の種類によって異る。
望ましい熱成形である真空成形や圧空成形の場合には、
前記熱可塑性重合体シートを軟化させる必要があるので
、該シートを構成する素材のビカット軟化点(J I 
S−に7206)以上、融点以下の温度にまで加熱され
る。
前記熱成形によって矯正された歯列の形状を正確に転写
した熱可塑性重合体シートをそのまま常温附近の温度に
まで冷却して固化し、歯型石膏模型より取り外し、歯周
部分を目安に切断して形状を整えることによる凹型の歯
列矯正用マウスビスが得られる。この場合の切断は歯周
より3mm程度内側でも外側でも良いが歯周に直接当た
らない方がよい。
このようにして製作された凹型の歯列矯正用マウスピー
スは矯正する歯の部分だけが嵌合し難くなっているが、
該マウスピースは50〜800程度のゴム弾性を有して
おり、それほど硬くないので患者の歯列に無理なく装着
することができる。
また、矯正する歯牙以外の部分は各々の歯牙への適合性
か良いので、矯正する歯牙へ与える力を歯牙全体で分散
して受は止めることができる。
また、該マウスピースはそれほど硬度が高くないので、
歯列矯正用石膏模型を傷つけることか無く、同一形状の
歯列矯正用マウスピースを複数個製作できるし、この矯
正歯列石膏模型をベースにして更に切削、肉盛りして修
正を加えて、次の段階の矯正を行なうこともでき、この
ような操作を複数回繰り返してより正常な歯列に矯正す
ることができる。
〔実験例〕
本発明の歯列矯正用マウスピースについて、更に具体的
に説明するため、以下に実施例および比較例の実験例を
示す。
実施例1 歯列石膏模型の製作 土前歯2本の矯正を行う歯列不正患者の印象を、アルシ
ネ−1・印象材(スターミックス、日本歯研工業■製)
を用いて作成し、そこに硬質石膏(ダイヤストーン、三
菱鉱業セメント■製)を流して歯型石膏模型を作成した
歯列矯正用石膏模型の製作 前記歯列石膏模型の前歯を技工用バーで1mmの厚さで
切削すると共に、切削した個所の反対側を、エポキシ樹
脂系接着剤(コニシボンド、コニシ株式会社製)にて1
. mmの厚さで肉盛りして歯列矯正用石膏模型を製作
した。
熱可塑性重合体シートの製作 エチレン・酢酸ビニル共重合体樹脂(三菱ポリエチ−E
VA rV501HJ 、三菱油化■製、曲げ弾性率4
00 kg/cm、ビカット軟化点54℃、融点91°
C)の厚さ0. 5mm、縦15帥、横15amのプレ
スシートを吸収精密圧接器(スターバラり三金工業■製
)上に載置し、該プレスシートが85℃の温度になる迄
昇温した時に、前記歯列矯正用石膏模型に密着させて転
写を行った。
上記の如く転写して成形した転写成形体をドライヤーの
冷風で5分間冷却して固化させた。この転写成形体は石
膏模型より容易にとり外せた。
マウスースの製作 この凹状部分2と凸状部分3とを形成した転写成形体を
歯列矯正用石膏模型の歯周部位より2++++n上部に
合わせてハサミで切削して第1図に示すような上顎の歯
列と下顎の歯列に分離して装着することができる上顎の
歯列の歯列矯正用マウスピース]aと下顎の歯列の歯列
矯正用マウスピース1bとからなる歯列矯正用マウスピ
ース]を作成した。この歯列矯正用マウスピース1を上
記の矯正を行なう歯列不正患者に凹状部分2を歯列に被
せて試したところ、容易に装着出来かつ、前歯2本に歯
列の表面を覆う部分4の矯正の力が加わっていた。
前記歯列不正患者にこの歯列矯正用マウスピースを]ケ
月間装着した後に取り外し、上記歯列矯正用石膏模型を
更に]−mm切削し、その反対側の部位を’1. m+
n肉盛して修正を行ない、第2段階の歯列矯正用石膏模
型を製作した。
そして、この第2段階の歯列矯正用石膏模型をベースに
して再度熱可塑性重合体ンートを密着させて、第2段階
の歯列矯正用マウスピースを製作した。
そして、この第2段階の歯列矯正用マウスピースを前記
第1段階の歯列矯正を行なった歯列不正患者に装着した
ところ、装着が可能であった。これは前記第1段階の歯
列矯正が十分に行なわれたことを示すもので、第2段階
の歯列矯正に入ったことを意味するものである。
【図面の簡単な説明】
第1図は本発明実施例の歯列矯正用マウスピースの斜視
図を表す。 1・・・歯列矯正用マウスピース、1a・・・上顎の歯
列の歯列矯正用マウスピース、1b・・下顎の歯列の歯
列矯正用マウスピース、 2・・・凹状部分、 3・・ 凸状部分、 4・・・歯列の表面を覆う部分、 5・・・歯肉 の表面を覆う部分。

Claims (1)

  1. 【特許請求の範囲】 1、歯列不正患者より採取した歯列石膏模型を修正して
    歯列矯正用石膏模型を製作し、該歯列矯正用石膏模型に
    軟化した熱可塑性重合体シートを密着した後固化させて
    取り外すことを特徴とする歯列矯正用マウスピースの製
    造法。 2、熱可塑性重合体が、曲げ弾性率 (ASTM−D747)800kg/cm以下のもので
    ある請求項1に記載の歯列矯正用マウスピースの製造法
JP13498490A 1990-05-24 1990-05-24 歯列矯正用マウスピースの製造法 Pending JPH0428359A (ja)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP13498490A JPH0428359A (ja) 1990-05-24 1990-05-24 歯列矯正用マウスピースの製造法

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP13498490A JPH0428359A (ja) 1990-05-24 1990-05-24 歯列矯正用マウスピースの製造法

Publications (1)

Publication Number Publication Date
JPH0428359A true JPH0428359A (ja) 1992-01-30

Family

ID=15141208

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Country Status (1)

Country Link
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