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TiN 및 DLC 코팅된 척추용 나사못 시스템 Rod의 기계적 특성 분석
강관수(Kwan-Su Kang),정태곤(Tae-Gon Jung),양재웅(Jae-Woong Yang),우수헌(Su-Heon Woo),박태현(Tea-Hyun Park),정용훈(Yong-Hoon Jeong) 한국표면공학회 2017 한국표면공학회지 Vol.50 No.3
In this study, surface morphology and mechanical property of TiN and DLC coated pedicle screw have been investigated by field-emission scanning electron microscopy, energy dispersive X-ray spectroscopy, Xray diffraction, vickers hardness test, axial gripping, and axial torsional gripping capacity test. From the EDS and XRD results, the composition and crystal structure of TiN and DLC coated surface were verified. The hardness value was increased by TIN and DLC coating, and the DLC coating surface has the highest value. The gripping capacity also showed higher value for TiN and DLC coated specimen than that of non-coated (Ti alloy) surface. The surface morphology of gripping tested specimen showed rougher scratched surface from Ti alloy than TiN and DLC coated layer.
TiN 및 DLC 코팅된 척추경나사못시스템 수술기구의 기계적 안정성 분석
강관수(Kwan-Su Kang),정태곤(Tae-Gon Jung),양재웅(Jae-Woong Yang),우수헌(Su-Heon Woo),박태현(Tea-Hyun Park),정용훈(Yong-Hoon Jeong) 한국표면공학회 2019 한국표면공학회지 Vol.52 No.3
Durability of instrument is one of the most important factor to ensure accurate treatment and decrease failure for the orthopedic surgical operation. Normally, a set-screw driver tip has been processed with hard coating for their higher durability and wear resistance. And several surface modification methods were obtained such as titanium nitride (TiN) coating, diamond like carbon coating, other nitriding, and etc. In this study, we have surface modified on set-screw driver tip with TiN and DLC, investigated whether the TiN and DLC coatings affect the mechanical properties and durability of the set-screw driver tip in the pedicle screw system. The surface morphologies were observed with scanning-electron microscopy (SEM), and the static/dynamic torsional properties were investigated with universal testing machine based on ASTM F543. Coating thickness of each coatings were commonly around 1oC. Static torsional stiffness, and ultimate torque values for DLC and TiN coated samples were significantly higher than those of non-coated sample by the pared T-test. Surface morphology of after the dynamic torsional test was more clean with less scratch or friction traces from DLC coating than that of TiN coating and non-coated sample.
마그네트론 스퍼터링 시스템을 이용한 정형외과용 PEEK의 타이타늄/하이드록시아파타이트 이중 코팅층의 표면 특성 분석
강관수(Kwan-Su Kang),정태곤(Tae-Gon Jung),양재웅(Jae-Woong Yang),우수헌(Su-Heon Woo),박태현(Tea-Hyun Park),정용훈(Yong-Hoon Jeong) 한국표면공학회 2018 한국표면공학회지 Vol.51 No.3
In this study, we have fabricated pure titanium (Ti)/hydroxyapatite (HA) double layer coating on medical grade PEEK from magnetron sputtering system, an investigation was performed whether the surface can be had more improve bio-active for orthopedi/dental applications than that of non-coated one. Pure Ti and HA coating layer were obtained by a radio-frequency and direct current power magnetron sputtering system. The microstructures surface, mechanical properties and wettability of the pure Ti/HA double layer deposited on the PEEK were analyzed by scanning electron microscopy (SEM), energy dispersive X-ray spectroscopy (EDS), X-ray diffraction (XRD), nano-indentation, and contact angle test. According to the EDS and XRD results, the composition and crystal structure of pure Ti and HA coated surface were verified. The elastic modulus and hardness value were increased by pure Ti and HA coating, and the pure Ti/HA double layer coating surface has the highest value. The contact angle showed higher value for pure Ti/HA double layered coating specimens than that of non-coated (PEEK) surface.