II 級ゴムを併用したマルチループエッジワイズアーチワイヤーにおける L-ループの効果について : アイディアルアーチワイヤーとの比較

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概要

• 論文の詳細を見る

• マルチループエッジワイズアーチワイヤー(MEAW)とアイディアルアーチワイヤーをフィニッシングアーチワイヤーとしてII級ゴムとともに用いた場合, 両ワイヤーの上顎歯列に対する影響を比較検討するために, 光弾性実験法を用いて応力分布の違いを評価した.実験は, まずエポキシおよびウレタン樹脂を使い上顎用光弾性モデルを作製した.次に0.018"×0.025"スタンダードブラケットを光重合型レジンで初期ひずみが出ないように装着した.荷重は等色線の観察を容易にするため, II級ゴムを円偏光器下において使用した.その結果, 大臼歯部では第一, 第二大臼歯とも遠心根尖部に応力集中がみられたが, いずれもMEAWモデルのほうが大きかった.小臼歯部では, MEAWモデルの第二小臼歯の根の歯冠側3分の1のところに高い応力がみられ, 前歯部においても応力の高いところが明らかとなった.この応力分布の観察から, II級ゴム使用時におけるMEAWの主な作用は, 臼歯部のわずかな圧下を伴った遠心傾斜と前歯部の挺出を伴った遠心傾斜であることが示された.MEAWはL-ループが組み込まれていることによりアイディアルアーチワイヤーに比べ少ない牽引力で効果的にII級関係を改善する可能性が示唆された.

著者

• HAYASHI Hiroaki

  Department of Applied Biological Chemistry, Graduate School of Agricultural and Life Sciences, The U

• Caputo Angelo

  Section Of Biomaterials Science School Of Dentistry University Of California Los Angeles Usa

• 松井 成幸

  Department Of Orthodontics School Of Dentistry Meikai University

• KATAYAMA Keiji

  Department of Orthodontics, School of Dentistry, Meikai University

• KIYOMURA Hiroshi

  Department of Orthodontics, School of Dentistry, Meikai University

• Katayama Keiji

  Department Of Orthodontics School Of Dentistry Meikai University

• Kiyomura Hiroshi

  Department Of Orthodontics School Of Dentistry Meikai University

• Hayashi Hiroaki

  Department Of Applied Biological Chemistry Graduate School Of Agricultural And Life Science The Univ

• Hayashi Hiroaki

  Department Of Orthodontics School Of Dentistry Meikai University

• Hayashi Hiroaki

  Department Of Agricultural Cheinistry Faculty Of Agriculture University Of Tokyo

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