한국표면공학회지 (41권5호 232-239)
Surface Characteristics and Electrochemical Behaviors of TiN and ZrN Coated Orthodontic Mini-screw
ZrN 및 TiN 코팅된 치과교정 용 미니나사의 표면특성과 전기화학적 거동
김신영;문영필;박근형;조호형;김원기;손미경;최한철;
Kim, S.J.;Moon, Y.P.;Park, G.H.;Jo, H.H.;Kim, W.G.;Son, M.K.;Choe, H.C.;
조선대학교 치과대학 생체재료학교실 및 생체재료나노계면활성화센터, 2단계 BK21;
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;
The dental orthodontic mini-screw requires good mechanical properties and high corrosion resistance for implantation in the bone. The purpose of this study was to investigate the electrochemical characteristics of TiN and ZrN coated orthodontic mini-screws, mini-screws were used for experiment. Ion plating was carried out for mini-screw using Ti and Zr coating materials with nitrogen gas. Ion plated surface of each specimen w as o bserved with f ield emission scanning e lectron microscopy ( FE-SEM), e nergy dispersive x-ray spectroscopy (EDX), and electrochemical tester. The surface of TiN and ZrN coated mini-screw were more smooth than that of other kinds of non-coated mini-screw due to dercrease of machined defects. The corrosion current density of the TiN and ZrN coated mini-screw decreased compared to non-coated sample. The corrosion potential of TiN and ZrN coated mini-screw were higher than that of non-coated mini-screw in 0.9% NaCl solution. The pitting corrosion resistance increased in the order of ZrN coated, TiN coated and non-coated wire. Pitting potential of ZrN coated mini-screw was the highest in the other specimens.
Orthodontic mini-screw;TiN coating;ZrN coating;Electrochemical characteristics;Ion-plating;
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