アブストラクト(24巻2号:神奈川歯学)

神奈川歯学

Japanese

Title : SEM観察による義歯製作過程における粘膜表面形態の変化
Subtitle : 原著
Authors : 松尾悦郎*, 森田望之*, 豊田實*, 今井崇隆*, 本間和人*, 木村朗*, 松尾雅斗**
Authors(kana) :
Organization : *神奈川歯科大学補綴学教室第一講座, **神奈川歯科大学口腔解剖学教室
Journal : 神奈川歯学
Volume : 24
Number : 2
Page : 412-419
Year/Month : 1989 / 9
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初めとする一連の操作を必要とし, 各ステップでの行為が寸法精度や表面形態再現性に影響を及ぼすと考えられる. また, 影響を及ぼす因子は多種なものが存在し, 因子自体や, それらの組み合わせによって様々な結果を生じる. 使用される材料単体の収縮変形, 膨張変形, 弾性ひずみならびに永久ひずみなどのデータは表示されている正しい指定にしたがって使用すれば, その材料のステップ内では適切な性能が得られるように調整されているが, 他の材料の使用がからむ一連の操作の流れの中では, どの過程でどの程度の変化が生ずるかについては不明な点が多い. 過去の実験では金型などを原型としてレジン床に置換されるまでの原型に対するレジンの変形を対象としたものが多く, 途中経過を, ブラックボックスとして結果のみを論じたもの, あるいは各過程毎の材料単独の測定のみにとどまっている. したがって, 原型に当たる口腔粘膜から完成義歯までを総括的に寸法精度や表面形態再現性の定量を行い, どの段階が完成義歯の精度に大きく関与する等を知る必要がある.
Practice : 歯科学
Keywords : 義歯製作, 粘膜表面形態, SEM観察

English

Title : Observation with SEM on The Displacement of Mucosal Surface in Process of Denture Fabrication
Subtitle : Original article
Authors : Etsuro MATSUO*, Kimiyuki MORITA*, Minoru TOYODA*, Munetaka IMAI*, Kazuto HONMA*, Akira KIMURA*, Masato MATSUO**
Authors(kana) :
Organization : *The 1st Department of Prosthetic Dentistry, Kanagawa Dental College, **Departmemt of Oral Anatomy, Kanagawa Dental College
Journal : Kanagawa Shigaku
Volume : 24
Number : 2
Page : 412-419
Year/Month : 1989 / 9
Article : Original article
Publisher : Kanagawa Odontological Society
Abstract : Abstract : The process of denture fabrication entails a series of steps that begin with impression-taking. Dimensional accurracy and displacement of surface repeatability affect results in these individual steps. Although changes in individual materials have already been measured in the past, there has been almost no measurement up to now of denture fabrication up to the denture base, using the mucous membrane as the standard and then measuring changes in the displacement of surface repeatability for each step. Noticing this lack, the authors used a Scannig Electron Microscope (SEM), presently the only non-contact measuring instrument that can be used, and measured changes at the different stages including the mucous membrane, the impression materials, the plaster and the resin. A drying process is required for the mucous membrane, and such a process can cause cganges in the mucous membrane which is the basis of measuremnt. For this reason, the authors used Araldite, a product from Ciba-Geigy AG, as a replica material and made replicas for all the test materials, using the replicas for measurement. Results were as follows : 1. Araldite was used as the replica material, thus making it possible with the SEM to observe changes in the displacement of surface repeatability at the individual stages. 2. Major changes in the accuracy of surface were observed during impression-taking and in the period of moving from the impression material to the plaster. 3. During high-power observation with the SEM, the fine bumps on the surface of the plaster and resin disappeared and the susfaces became smooth. This is believed to be the result of the separating agent and heat.
Practice : Dentistry
Keywords :