삽입철거 회수가 수종의 Cr-Co 합금 Clasp 유지력에 미치는 영향에 관한 실험적 연구
THE EXPERIMENTAL STUDY ON THE EFFECT OF THE INSERTION-WITHDRAWAL COUNT TO THE RETENTIVE CAPACITIES OF SEVERAL Cr-Co ALLOY CLASPS
배정수, 이호용,
소속 상세정보
배정수 ( Bae Jung-Soo ) - 연세대학교 치과대학 치과보철학교실
이호용 ( Lee Ho-Yong ) - 연세대학교 치과대학 치과보철학교실
KMID : 0362419920300040498
Abstract
This study was to investigate the retentive force changes according to repeated insertion and withdrawal of Cr-Co alloy clasps, commonly used in this country, and the differences in retentive capacities between Aker’s clasp and I-bar clasp. The author selected 4 kinds of Cr0Co alloys and Type Ⅳ gold alloy, and measured the retentive force changes of each clasp type in undercut depth of 0.25mm and analyzed statistically. The following results were obtained. 1. In both Aker’s and I-bar clasps, there were no statistically significant differencies in retentive forces among 4 Cr-Co alloys. 2. Cr-Co alloys exerted greater retentive forces than those of gold alloy, 2 times greater in Aker’s clasps and 2.5 times in I-bar clasps. 3. In all test specimens, I-bar clasps exerted greater retentive forces than Aker’s clasps. 4. In all test specimens, there were trends of second order relationships in retentive force changes.
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