The Journal of Korean Academy of Prosthodontics (대한치과보철학회지)

The Korean Academy of Prosthodonitics (대한치과보철학회)
권호 표지

SURFACE CHANGE AND FIT OF TIN-COATED ABUTMENT SCREW AFTER REPEATED CLOSING AND OPENING

TiN 코팅된 지대주 나사의 반복 착탈 후 표면 변화와 적합도에 관한 연구

  • Kim, Jong-Nam (Department of Dentistry, Graduate School of Chosun University) ;
  • Chung, Chae-Heon (Department of Dentistry, Graduate School of Chosun University) ;
  • Kim, Hee-Jung (Department of Dentistry, Graduate School of Chosun University)
  • 김종남 (조선대학교 치과대학 보철학교실) ;
  • 정재헌 (조선대학교 치과대학 보철학교실) ;
  • 김희중 (조선대학교 치과대학 보철학교실)
  • Published : 2007.02.28
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Abstract

Statement of problem: A few dry lubricants were applied to abutment screws for the improvement of joint stability. Purpose: The purpose of this study was to evaluate the surface change and fit of TiN-Coated abutment screw through the examination of tested screws in the field emission scanning electron microscope(FE-SEM;Netherland, Phillips co., model:XL 30 SFEG) after repeated closing and opening. Materials and method: Titanium(3i/implant Innovations Inc, USA) and Gold-Tite abutment screws(3i/implant Innovations Inc, USA) were selected for Group A and C respectively. TiN coated titanium abutment screws were also divided into two groups, Group B and D. Abutment screws of each group and the fit of abutment screw/implant fixture/abutment were observed on FE-SEM after repeated closing and opening test respectively. Results: 1. The abutment screws of TiN coated groups(Group B and D) showed more remarkable wear resistance in the threads of the screw than those of the other group(Group A and C). 2. There were more severe wear and defect of TiN coating in Group D tightened to 32 Ncm than Group B to 20 Ncm. 3. There was no difference in the fit of abutment screw/fixture/abutment among four groups, Group A, Group B, Group C and Group D. Conclusion: Under the conditions of this study, it is suggested that TiN coating of abutment screw be clinically acceptable and be expected to reduce the risk of abutment screw loosening. TiN coating of abutment screw showed good resistance against wear and the adequate fit of abutment screw/implant fixture/abutment.

Keywords

References

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