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내측 연결형 임플란트 지대주의 체결부 길이 변화에 따른 비선형 유한요소법적 응력분석

Other Titles
 The non-linear FEM analysis of different connection lengths of internal connection abutment 
 이용상  ;  강경탁  ;  한동후 
 Journal of Korean Academy of Prosthodontics (대한치과보철학회지), Vol.54(2) : 110-119, 2016 
Journal Title
Journal of Korean Academy of Prosthodontics(대한치과보철학회지)
Issue Date
Implant ; Dental implant-abutment design ; Dental stress analysis ; Finite element analysis
Purpose: This study is aimed to assess changes of stress distribution dependent on different connection lengths and placement of the fixture top relative to the ridge crest.
Materials and methods: The internal-conical connection implant which has a hexagonal anti-rotation index was used for FEM analysis on stress distribution in accordance with connection length of fixture-abutment. Different connection lengths of 2.5 mm, 3.5 mm, and 4.5 mm were designed respectively with the top of the fixture flush with residual ridge crest level, or 2 mm above. Therefore, a total of 6 models were made for the FEM analysis. The load was 170 N and 30-degree tilted.
Results: In all cases, the maximum von Mises stress was located adjacent to the top portion of the fixture and ridge crest in the bone. The longer the connection length was, the lower the maximum von Mises stress was in the fixture, abutment, screw and bone. The reduction rate of the maximum von Mises stress depending on increased connection length was greater in the case of the fixture top at 2 mm above the ridge crest versus flush with the ridge crest.
Conclusion: It was found that the longer the connection length, the lower the maximum von Mises stress appears. Furthermore, it will help prevent mechanical or biological complications of implants.
Files in This Item:
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Appears in Collections:
2. College of Dentistry (치과대학) > Dept. of Prosthodontics (보철과학교실) > 1. Journal Papers
Yonsei Authors
Han, Dong Hoo(한동후)
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