대한치과기공학회지 (Journal of Technologic Dentistry)
- 제30권1호
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- Pages.9-15
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- 2008
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- 1229-3954(pISSN)
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- 2288-5218(eISSN)
Ring 내 납형의 위치에 따른 귀금속합금 주조체의 수축공 관찰
The examination of the pores of casting bodies depending on the position of wax pattern in the ring for precious alloys
- Park, Min-Ju (Technical Research Center, Alphadent Co., Ltd.) ;
- Noh, Hak (Technical Research Center, Alphadent Co., Ltd.) ;
- Ko, Dae-Jin (Technical Research Center, Alphadent Co., Ltd.) ;
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Jung, Jong-Hyun
(Dept. of Dental Lab. Technology, Gwangju Health College)
- 발행 : 2008.07.15
초록
An investigation was carried out to examine the pores of casting bodies depending on the position of wax pattern in the ring for precious alloy by optical micrographs. From the result of optical micrographs, many pores were found in the Group C that wax pattern is placed in the center of the ring. However, any pores were scarcely found in the Group A, B, D and E that wax patterns are placed out of the center of thermal zone. In comparison with the pores of casting bodies of Group C, many pores were found at the cusp area rather than at the proximal surface. From these examination, it was concluded that wax pattern should be placed out of the center of thermal zone to prevent casting boies from occurring pores.