各種歯科材料の疲労に関する研究 : 第1報合着用セメントおよび支台築造用コンポジットレジンの圧縮強さについて

概要

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In this study, we investigated compressive strength of various Juting cements and composite resin cores in both dry and wet condition, and then influences of repeating load on compressive strength in wet condition of distilled water at 37℃. As frequency of repeating load increased, compressive strength of all materials decreased. It means that the repeated load cycling test used in this study is adequate for evaluating durability of various dental materials. The results were as follows : 1. In the condition of no loading in both dry and wet condition, resin cement indicated the highest compressive strength of all cements examined and was followed by glass ionomer cement, zinc phosphate cement and polycarboxylate cement. Glass ionomer cement was notably influenced in wet condition. 2. After 10,000 cycles of loading in wet condition, resin cement indicated the highestcompressive strength again and was followed by glass ionomer cement, polycarboxylate cementand zinc phosphate cement. In particular, compressive strength of zinc phosphate cementdecreased remarkably. 3. In the condition of no loading, visible light-cured composite resin core was superior tochemical one. Visible light one was notably influenced in wet condition. 4. After 10,000 cycles of loading, visible light-cured composite resin core was superior to chemical one.
日本補綴歯科学会の論文
1989-08-01