치아우식보철용 금관/지대주 사이의 변연적합성에 die spacer 코팅이 미치는 영향
Effects of die spacer coating on marginal accuracy of metal crown on implant abutment
민정범, 박근형, 김선욱, 박수정, 최한철, 고영무,
소속 상세정보
민정범 ( Min Jeong-Bum ) - 조선대학교 치과대학 치과보존학교실
박근형 ( Park Keun-Hyung ) - 조선대학교 치과대학 치과재료학교실 및 치과기자재시험평가센터
김선욱 ( Kim Sun-Wook ) - 조선대학교 치과대학 치과재료학교실 및 치과기자재시험평가센터
박수정 ( Park Su-Jung ) - 조선대학교 치과대학 치과재료학교실 및 치과기자재시험평가센터
최한철 ( Choe Han-Cheol ) - 조선대학교 치과대학 치과재료학교실 및 치과기자재시험평가센터
고영무 ( Ko Yeong-Mu ) - 조선대학교 치과대학 치과재료학교실
KMID : 0362220070340020083
Abstract
An important criterion for the success of a crown is marginal fit. Fit of a restoration and its cementation procedure is crucial to both its short and long term prognosis. Marginal fit is affected by many variables during the fabrication process. Casting alloys were prepared and fabricated using non-precious metal at 950℃. Specimens are divided into four groups: I(die spacer painted casting for wax pattern), Ⅱ(die spacer non painted casting for wax pattern), Ⅲ(die spacer painted casting for resin pattern) and Ⅳ(die spacer painted casting for resin pattern). The specimens were cut and polished for marginal gap observation. The marginal gap was observed using scanning electron microscopy(SEM). We observed the marginal fidelity of die spacer painted specimens was higher than that of die spacer non painted specimens by SEM. Casting for wax pattern, the gap size at the top decreased as die spacer application times increased, indicated the good marginal fidelity for abutment/crown. In the other hands, casting for resin pattern, the gap size of die spacer painted specimens at the top decreased than die spacer non painted specimens about 3 ～ 4 times. The purpose of this study was to evaluate the marginal fidelity according to die spacer application times and measurement site.
키워드
restoration;die spacer application times;measurement site;marginal gap
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