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지대주 나사 풀림 방지를 위한 새로운 Lock Screw 시스템의 효과에 대한 유한요소해석적 연구

Other Titles
 Finite element analysis of the effect of novel Lock Screw system preventing abutment screw loosening 
 임은섭  ;  김종은  ;  김지환  ;  박영범 
 Journal of Dental Rehabilitation and Applied Science (구강회복응용과학지), Vol.35(3) : 132-142, 2019-09 
Journal Title
 Journal of Dental Rehabilitation and Applied Science (구강회복응용과학지) 
Issue Date
Finite element analysis ; Abutment screw loosening ; Preload ; Friction force ; Axial loading
Purpose: The purpose of this finite element analysis study is to introduce the novel Lock screw system and analyze its mechanical property to see if it can prevent abutment screw loosening. Materials and Methods: The Lock screw is a component tightened on the inside of the implant abutment which applies compressive force to the abutment screw head. To investigate the effect, modeling was done using CAD program and it was analyzed by finite element analysis under various load conditions. First, the preload was measured according to the tightening torque of the abutment screw then it was compared with the theoretical value to verify the analytical model. The validated analytical model was then divided into those with no external load and those with 178 N, and the tightening torque of the lock screw was changed to 10, 20, 30 Ncm respectively to examine the property of stress distribution on the implant components. Results: Using Lock screw under various loading conditions did not produce equivalent stresses beyond the yield strength of the implant components. In addition, the axial load was increased at the abutment-abutment screw interface. Conclusion: The use of Lock screw does not exert excessive stress on the implant components and may increase the frictional force between the abutment-abutment screw interface, thus it is considered to prevent loosening of the abutment screw.
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
Kim, Jong Eun(김종은) ORCID logo https://orcid.org/0000-0002-7834-2524
Kim, Jee Hwan(김지환) ORCID logo https://orcid.org/0000-0002-0872-4906
Park, Young Bum(박영범)
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