대한치과기공학회지 (Journal of Technologic Dentistry)

  • 제43권3호
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  • Pages.99-105
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  • 2021
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  • 1229-3954(pISSN)
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  • 2288-5218(eISSN)
대한치과기공학회 (Korean Academy of Dental Technology)
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지대주 나사 조임 토크가 맞춤형 지대주 임플란트 시스템의 연결부 안정성에 미치는 영향: 3차원 유한 요소 해석

Effect of tightening torque on the connection stability of a custom-abutment implant system: 3D finite element analysis

  • 홍민호 (부산가톨릭대학교 보건과학대학 치기공학과)
  • Hong, Min-Ho (Department of Dental Laboratory Science, College of Health Sciences, Catholic University of Pusan)
  • 투고 : 2021.08.18
  • 심사 : 2021.09.16
  • 발행 : 2021.09.30
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초록

Purpose: This study aims to examine the stress distribution effect of tightening torques of different abutment screws in a custom-abutment implant system on the abutment-fixture connection interface stability using finite element analysis. Methods: The custom-abutment implant system structures used in this study were designed using CATIA program. It was presumed that the abutment screws with a tightening torque of 10, 20, and 30 N·cm fixed the abutment and fixture. Furthermore, two external loadings, vertical loading and oblique loading, were applied. Results: When the screw tightening torque was 10 N·cm, the maximum stress value of the abutment screw was 287.2 MPa that is equivalent to 33% of Ti-6Al-4V yield strength. When the tightening torque was 20 N·cm, the maximum stress value of the abutment screw was 573.9 MPa that is equivalent to 65% of Ti-6Al-4V yield strength. When the tightening torque was 30 N·cm, the maximum stress value of the abutment screw was 859.6 MPa that is similar to the Ti-6Al-4V yield strength. Conclusion: As the screw preload rose when applying each tightening torque to the custom-abutment implant system, the equivalent stress increased. It was found that the tightening torque of the abutment influenced the abutment-fixture connection interface stability. The analysis results indicate that a custom-abutment implant system should closely consider the optimal tightening torque according to clinical functional loads.

키워드

과제정보

This paper was supported by grant from Catholic University of Pusan, 2021.

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