임플랜트 상부 보철물의 고정 방식에 따른 힘의 분포에 관한 연구
A COMPARISON OF LOAD TRANSFER IN SCREW-AND CEMENT-RETAINED IMPLANT FIXED PARTIAL DENTURE DESIGNS
이주희, 김창회, 김영수,
소속 상세정보
이주희 ( Lee Joo-Hee ) - 서울대학교 치과대학 치과보철학교실
김창회 ( Kim Chang-Whe ) - 서울대학교 치과대학 치과보철학교실
김영수 ( Kim Yung-Soo ) - 서울대학교 치과대학 치과보철학교실
KMID : 0362420010390020125
Abstract
To compare the stress distribution patterns between cement-retained and screw-retained implant supported fixed prostheses according to four different abutment types, a three dimensional finite element analysis was performed. The hypothetical three unit fixed partial denture case was modeled on the three implants (10mm length and 3.75 diameter) in mandibular bone. Four angles of implantation (vertical 10,15 and 20 degree inclined mesially) were created and three different directions of force (vertical, oblique, horizontal) were applied at the center of the second premolar and distal end of the first molar for each cases. Within the limits of this study, the results were as follows. 1. In vertically installed cases, the more stress was concentrated at upper components, but mesially inclined cases, the more stress was concentrated at cortical bone. 2. The more inclined mesially the more stress was observed, especially at cortical bone. 3. The cement-retained models showed lower principal stress and more even stress distribution than the screw-retained models. 4. The similar stress distribution pattern was showed in model 1 and model 2, model 3 and model 4. 5. The more stress was observed when the loads were applied at the distal end of 1st molar than the center of 2nd premolar. 6. The fixture and the model as a whole, lesser stress values were observed when vertical loads were applied as compared to horizontal and oblique loads.
키워드
Screw-retained; Cement-retained; 3 dimensional finite element analysis; Mesial inclination
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