치관 보철물 제작에 사용되는 치과용 금속의 변연 적합도 비교
A comparison of marginal fitness by dental alloys
김남중, 황경숙, 박용덕,
소속 상세정보
김남중 ( Kim Nam-Joong ) - 신흥실업전문대학 치기공과
황경숙 ( Hwang Kyung-Sook ) - 신흥대학교 치기공과
박용덕 ( Park Yong-Duk ) - 경희대학교 치과대학 예방치과학교실
KMID : 0362120030250010029
Abstract
This study was aimed to verify a comparison by dental alloys upon the marginal fitness of dentalprosthesis. Firstly, we waxed up on 45 epoxy resin dies, pressed the margin with hands, andidentified the marginal fitness with microscope. And we made a single direct spruing system typeof sprue by 3 dental alloys - metal crown alloys, PFM crown alloys, and gold crown alloys - each15, total 45 waxing up, adjusting W/P ratio and invested the cast ring. Then, we made the dentalprosthesis using the electric casting machine. In these processes we followed the manufacturer’sinstructions, in order to maintain the other conditions from the inner and outer, which includedinvestment and burning out. After we tried on the dental prosthesis on epoxy resin dies, we havegot the means of marginal gap at 9 points with same distances, around the cervical line which waschecked already, using microscope(300). The results of this study were as follows :1. Metal crown alloys showed 2.9% better in marginal fitness than PFM crown alloys, and thedifference was not statistically significant(P=0.497). 2. Gold crown alloys showed 31.3% better in marginal fitness than Metal crown alloys, and thedifference was statistically significant(P=0.004).3. Gold crown alloys showed 32.4% better in marginal fitness than PFM crown alloys, and thedifference was statistically significant(P=0.002).4. We saw that Gold crown alloys was the best dental alloys in the marginal fitness among thethree.(P=0.049).
키워드
dental casting alloys;marginal fitness;dental prosthesis
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