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임플랜트-지대주의 연결방법에 따른 임플랜트 보철의 유한요소 응력분석

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Author(s)
허진경
Issued Date
2005
Abstract
Finite Element Stress Analysis of Implant Prosthesis according to Connection Types of Implant-Abutment

Hur, Jin-Kyung, D.D.S., M.S.D.
Advisor: Prof. Kay, Kee-Sung, D.D.S., M.S.D., Ph.D.
Dept of Dentistry,
Graduate School of Chosun University

The purpose of this study was to assess the loading distributing characteristics of implant systems with internal connection(model 1) or external connection(model 2) under vertical and inclined loading using finite element analysis.
Two finite element models were designed according to type of internal connection(model 1) or external connection(model 2). The crown for mandibular first molar was made using cemented abutment. Each three-dimensional finite element model was created with the physical properties of the implant and surrounding bone.
This study simulated loads of 200N at the central fossa in a vertical direction (loading condition A), 200N at the centric cusp tip in a 15◦ inward inclined direction (loading condition B), or 200N at the centric cusp tip in a 30◦ outward inclined direction (loading condition C) respectively. Von Mises stresses were recorded and compared in the supporting bone, fixture, abutment and abutment screw.

The following results have been made based on this study:

1.In comparison with the whole stress of the model 1 and model 2, the stress pattern was shown through th contact of the abutment and the implant fixture in the model 1, while the stress pattern was shown through the abutment screw mainly in the model 2.
2.Without regard to the loading condition, greater stress was taken at the cortical bone, and lower stress was taken at the cancellous bone. The stress taken at the cortical bone was greater at the model 1 than at the model 2, but the stress taken at the cortical bone was much less than the stress taken at the abutment, the implant fixture, and the abutment screw in case of both model 1 and model 2.
3. Without regard to the loading condition, the stress pattern of the abutment was greater at the model 1 than at the model 2.
4. In comparison with the stress distribution of model 1 and model 2, the maximum stress was taken at the abutment in the model 1, while the maximum stress was taken at the abutment screw in the model 2.
5. The magnitude of the maximum stress taken at the supporting bone, the implant fixture, the abutment, and the abutment screw was greater in the order of loading condition A, B, and C.

In conclusion, the stress distribution pattern of the internal connection system was mostly distributed widely to the lower part along the inner surface of the implant fixture contacting the abutment core through its contact portion because of the intimate contact of the abutment and the implant fixture, and so the less stress was taken at the abutment screw, while the abutment screw can be the weakest portion clinically because the greater stress was taken at the abutment screw in case of the external connection system, and therefore the further clinical study about this problem is needed.
Alternative Title
Finite Element Stress Analysis of Implant Prosthesis according to Connection Types of Implant-Abutment
Alternative Author(s)
Hur, Jin-Kyung
Affiliation
조선대학교 대학원
Department
일반대학원 치의학과
Advisor
계기성
Awarded Date
2005-02
Table Of Contents
Ⅰ. 서 론 1
Ⅱ. 연구재료 및 방법 4
Ⅲ. 연구성적 9
Ⅳ. 총괄 및 고안 21
Ⅴ. 결 론 27
참고문헌 29
Degree
Doctor
Publisher
조선대학교 대학원
Citation
허진경. (2005). 임플랜트-지대주의 연결방법에 따른 임플랜트 보철의 유한요소 응력분석.
Type
Dissertation
URI
https://oak.chosun.ac.kr/handle/2020.oak/5859
http://chosun.dcollection.net/common/orgView/200000234654
Appears in Collections:
General Graduate School > 4. Theses(Ph.D)
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