대한치과보철학회지 (The Journal of Korean Academy of Prosthodontics)
- 제31권3호
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- Pages.317-349
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- 1993
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- 0301-2875(pISSN)
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- 2005-3789(eISSN)
Alumina와 zirconia가 치과용 코아 도재의 물리적 성질에 미치는 영향에 관한 실험적 연구
AN EXPERIMENTAL STUDY OF THE EFFECT OF ALUMINA AND ZIRCONIA ON MECHANICAL PROPERTIES OF DENTAL CORE PORCELAIN
- Shin Hyeon-Soo (Department of Prosthodontics, School of Dentistry, Yonsei University) ;
- Lee Sang-Jin (Department of Ceramic Engineering, Yonsei University) ;
- Lee Keun-Woo (Department of Prosthodontics, School of Dentistry, Yonsei University)
- 발행 : 1993.08.01
초록
This study investigated the effect of filler particle size and weight% on mechanical properties of dental core porcelain. In alumina, variation in particle size and weight% and in zirconia, variation in weight%, all specimens were tested three-point bending strength, transmittance, thermal expansion coefficient, porosity and shrinkage and observed with SEM and analysed with X-ray diffractometer. In order to develop shrink-free porcelain, after firing alumina only, glass wasinfiltrated. And aluminum was added to alumina with the expanding character of aluminum oxidize into alumina, and was followed by second firing of glass infiltration procedure. Then mechanical properties were observed. The results of this study were obtained as follows. 1. The bending strength of zirconia was higher than that of alumina, and