한국표면공학회지 (Journal of the Korean institute of surface engineering)

  • 제41권6호
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  • Pages.292-300
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  • 2008
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  • 1225-8024(pISSN)
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  • 2288-8403(eISSN)
한국표면공학회 (The Korean Institute of Surface Engineering)
권호 표지
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TiN 및 WC코팅된 치과용 어버트먼트 나사의 안정성

Stability of TiN and WC Coated Dental Abutment Screw

  • 손미경 (조선대학교 치과대학 치과보철학교실) ;
  • 이충환 (조선대학교 치과대학 치과보철학교실) ;
  • 정재헌 (조선대학교 치과대학 치과보철학교실) ;
  • 정용훈 (조선대학교 치과대학 생체재료학교실 및 생체재료나노계면활성화센터, 2단계 BK21) ;
  • 최한철 (조선대학교 치과대학 생체재료학교실 및 생체재료나노계면활성화센터, 2단계 BK21)
  • Son, M.K. (Department of Prosthodontics, College of Dentistry, Chosun University) ;
  • Lee, C.H. (Department of Prosthodontics, College of Dentistry, Chosun University) ;
  • Chung, C.H. (Department of Prosthodontics, College of Dentistry, Chosun University) ;
  • Jeong, Y.H. (Department of Dental Materials & Research Center of Nano-Interface Activation for Biomaterials, College of Dentistry, 2nd Stage of Brain Korea 21 for College of Dentistry, Chosun University) ;
  • Choe, H.C. (Department of Dental Materials & Research Center of Nano-Interface Activation for Biomaterials, College of Dentistry, 2nd Stage of Brain Korea 21 for College of Dentistry, Chosun University)
  • 발행 : 2008.12.31
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초록

Dental implant system is composed of abutment, abutment screw and implant fixture connected with screw. The problems of loosening/tightening and stability of abutment screw depend on surface characteristics, like a surface roughness, coating materials and friction resistance and so on. For this reason, surface treatment of abutment screw has been remained research problem in prosthodontics. The purpose of this study was to investigate the stability of TiN and WC coated dental abutment screw, abutment screw was used, respectively, for experiment. For improving the surface characteristics, TiN and WC film coating was carried out on the abutment screw using EB-PVD and sputtering, respectively. In order to observe the coating surface of abutment screw, surfaces of specimens were characterized, using field emission scanning electron microscope(FE-SEM) and energy dispersive x-ray spectroscopy(EDS). The stability of TiN and WC coated abutment screw was evaluated by potentiodynamic, and cyclic potentiodynamic polarization method in 0.9% NaCl solution at $36.5{\pm}1^{\circ}C$. The corrosion potential of TiN coated specimen was higher than those of WC coated and non-coated abutment screw. Whereas, corrosion current density of TiN coated screws was lower than those of WC coated and non-coated abutment screw. The stability of screw decreased as following order; TiN coating, WC coating and non-coated screw. The pitting potentials of TiN and WC coated specimens were higher than that of non-coated abutment screw, but repassivation potential of WC coated specimen was lower than those of TiN coated and non-coated abutment screws due to breakdown of coated film. The degree of local ion dissolution on the surface increased in the order of TiN coated, non-coated and WC coated screws.

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