하악 임플란트 Bicortication 의 응력분산효과에 관한 유한요소분석적 연구
A STUDY ON THE EFFECT OF STRESS DISTRIBUTION OF MANDIBULAR IMPLANT BICORTICATION UTILIZING FINITE ELEMENT ALALYSIS METHOD
이양진, 양재호, 이선형, 정헌영,
소속 상세정보
이양진 ( Yi Yang-Jin ) - 서울대학교 치과대학 치과보철학교실
양재호 ( Yang Jae-Ho ) - 서울대학교 치과대학 치과보철학교실
이선형 ( Lee Sun-Hyung ) - 서울대학교 치과대학 치과보철학교실
정헌영 ( Chung Hun-Young ) - 서울대학교 치과대학 치과보철학교실
KMID : 0362419950330030517
Abstract
Dental implantation is a method restoring missing teeth, especially in the case of severely resorbed edentulous patient. But the direct contact between bone and implant surface, induces stress concentration to the bone and eventually becomes a cause. The purpose of this study was to compare the stress distribution patterns between following two cylindrical implant models. One group has implant apex located in the inferior cortical bone and the other in the cancellous bone. Anterior edentulous mandible was modeled with two dimensional 953,878 nodes, 995,918 elements and compared the deflection and stress distribution under the 70 N,4 load cases for 26 models having variant mandibular height and length. The result were as follows; 1. The stress concentration was more affected by the height of the mandible than implant length. 2. Bicortication mitigates the stress of upper cortical and cancellous bone area at the same height of the mandible 3. Perforation of the inferior mandibular cortex significant stress concentration. 4. Stud type porstheses induced less stress concentration to the cortical and cancellous bone than bar type prostheses. 5. Stress of implant apex for stud type was larger than that of bar type.
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