Restorative Dentistry and Endodontics
- Volume 4 Issue 1
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- Pages.35-38
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- 1978
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- 2234-7658(pISSN)
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- 2234-7666(eISSN)
AN EXPERIMENTAL STUDY ON HARDNESS IN COMPOSITE RESINS
수종복합레진의 경도측정에 관한 실험적 연구
- Um, Chung-Moon (Dept. of Operative Dentistry, College of Dentistry, Seoul National University)
- 엄정문 (서울대학교 치과대학 보존학교실)
- Published : 1978.12.31
Abstract
The purpose of this study was to measure micro-knoop hardness and coefficient of thermal expansion on composite resins (Epolite, Adaptic, Hipol and Compo T.) Four different type of composite resins were measured at the varying depth of 30, 60, 90, 150, 200, 400, 700 and 1000 micron from the surface to deep portion. The specimens were stored both in the air room temperature for 2 days, 30 days and in water at
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