アブストラクト（25巻1号：神奈川歯学）

神奈川歯学

Japanese

Title　： 非接触型微小形態計測装置の補綴領域への導入の試み -義歯製作の各過程における形態変化の追求-
Subtitle　： 原著
Authors　： 森田望之, 松尾悦郎
Authors（kana）　：
Organization　： 神奈川歯科大学補綴学教室第一講座
Journal　： 神奈川歯学
Volume　： 25
Number　： 1
Page　： 22-40
Year/Month　： 1990 / 6
Article　： 原著
Publisher　： 神奈川歯科大学学会
Abstract　： 「緒言」 義歯製作過程には印象採得を始めとする一連の複雑な操作を必要とし, 各ステップで形態再現精度に影響を及ぼすと考えられている. 従来から, 印象材, 石膏, レジンなどの主要材料の理工学的性質については, 金属原型を基準とした, 石膏模型やレジン床の寸法精度の変化が数多く報告されている. しかし, これらの研究は形態が単純な金属原型による結果であり, 複雑な形態を有する粘膜を対象とする場合には適切であるか否かはわからない. また, 一連の系の最初と結果のみが述べられ, 中間ステップをブラックボックスとして実験を行っているものが多く, 各ステップでの形態再現性に関する変化を, 研究したものは殆んどない. したがって, 原型とした粘膜から完成した義歯まで総括的に寸法精度や, 形態再現性の定量を行い, どの段階が最も義歯の適合に関与するかを判定する必要性があると考えられる. 著者らは以前からこの点に着目して, 走査型電子顕微鏡(SEM)やあらさ試験法を応用した研究を行ったが, 測定器性能の限界による以下のような問題点がクローズアップされた.
Practice　： 歯科学
Keywords　： 非接触測定, 表面形態変化, モアレトポグラフィー

English

Title　： An Attempt of Introduction to Prosthodontics of a Non-contact Device for Measuring Small Configurations Determining Configurational Chnges During the Indiviual Steps of Denture Fabrication
Subtitle　：
Authors　： Kimiyuki MORITA, Etsuro Matsuo
Authors（kana）　：
Organization　： The 1st Department of Prosthetic Dentistry, Kanagawa Dental College
Journal　： Kanagawa Shigaku
Volume　： 25
Number　： 1
Page　： 22-40
Year/Month　： 1990 / 6
Article　： Original article
Publisher　： Kanagawa Odontological Society
Abstract　： [Abstract]: Denture fabrication involves a number a number of complex operations that have an effect on reproduction accuracy during each step of the process. Traditionally, metal patterns act as the standard for the mechanical properties of the main materials used in denture making. This means that doubts still remain in cases where the mucous membrane, with its complex configurations, is the object of investigation. The non-contact measuring instrument using laser light (known hereafter as "measuring instrument") enabled measuring small configurations. The measuring instrument enabled measurement of physical configurations that up to now were considered impossible to measure. The fabrication process up to creation of a denture base with the mucous membrane as the basic pattern was divided into four steps for measurement : mucous membrane, impression material, plaster and resin. The measuring device simultaneously carried out qualitative and quantitative analysis in three dimensions for all steps. Processing of test materials was unnecessary so that measurements could be accomplished in a very short time. Measurements revealed a variety of features, including those that are not affected by the physical properties of the materials for measurement. It was also possible to systematically investigate they arious changes that take place during denture fabrication with the mucous membrane acting as the basic pattern. The following results were obtained : 1. The experiment confirmed possible application in dentistry of a non-contact device that uses laser light to measre extremely small configurations. 2. Results hint at the possibility of quantative measurement of objects that cannot be directly measured with conventional methods. 3. During fabrication of dentures, it is very easy for changes in the total cofiguration to occur when taking impressions. Minute changes in the configuration occure on the surface when taking the plaster cast. During the final stage of the resin base, the tiny configurations became flat and resembled the configutation of the impression more than the original configuration of the mucous membrane.
Practice　： Dentistry
Keywords　：