전석회화 처리가 양극산화 TiO2 나노튜브 층을 생성한 Ti-6Al-4V 합금의 표면활성도에 미치는 영향 (Effect of Precalcification Treatment on Bioactivity of Ti-6Al-4V Alloy Modified by Anodic Oxidation)

서지정보

· 발행기관 : 대한치과재료학회
· 수록지 정보 : 대한치과재료학회지 / 37권 / 1호 / 69 ~ 74페이지
· 저자명 : 전우용

초록

The purpose of this study was to investigate the bone conduction of Ti-6Al-4V alloy modified by anodic oxidation and precalcification treatments. Specimens of 20×10×1 mm in dimensions were polished sequentially from #220 to #1000 SiC paper, ultrasonically washed with acetone, then rinsed with deionized water. The electrolyte for anodization process consisted of 0.5 M Na2SO4 and 0.7 wt% NaF. Anodization was carried out at a potential of 20 V and current density of 20 mA/cm2 for 2 hours. Specimens were heat-treated at 500℃ for 2 hours and precalcified by soaking in Na2HPO4 solution for 24 hours and then in saturated Ca(OH)2 solution for 5 hours. To evaluate the activity of the precalcified TiO2 nanotube layer, modified specimens were immersed in simulated body fluid with pH 7.4 at 36.5℃ for 10 days. The results obtained were summarized as follows; 1. Vertically-oriented self-organized TiO2 nanotubes of diameters 60.0~90.0 nm were fabricated by anodizing treatment at 20 V for 2 h in an 0.5 M Na2SO4 and 0.7 NaF solution. 2. The amorphous structure of anodized TiO2 nanotubes was changed to anatase structure after heat treatment at 590 ℃ for 2 h. 3. The F ion in anodized TiO2 nanotube layer was removed after heat-treatment at 500 ℃. 4. The bone conduction of TiO2 nanotube layer was more enhanced by precalcification treatment in the solution containing calcium and phosphate ions.

영어초록

The purpose of this study was to investigate the bone conduction of Ti-6Al-4V alloy modified by anodic oxidation and precalcification treatments. Specimens of 20×10×1 mm in dimensions were polished sequentially from #220 to #1000 SiC paper, ultrasonically washed with acetone, then rinsed with deionized water. The electrolyte for anodization process consisted of 0.5 M Na2SO4 and 0.7 wt% NaF. Anodization was carried out at a potential of 20 V and current density of 20 mA/cm2 for 2 hours. Specimens were heat-treated at 500℃ for 2 hours and precalcified by soaking in Na2HPO4 solution for 24 hours and then in saturated Ca(OH)2 solution for 5 hours. To evaluate the activity of the precalcified TiO2 nanotube layer, modified specimens were immersed in simulated body fluid with pH 7.4 at 36.5℃ for 10 days. The results obtained were summarized as follows; 1. Vertically-oriented self-organized TiO2 nanotubes of diameters 60.0~90.0 nm were fabricated by anodizing treatment at 20 V for 2 h in an 0.5 M Na2SO4 and 0.7 NaF solution. 2. The amorphous structure of anodized TiO2 nanotubes was changed to anatase structure after heat treatment at 590 ℃ for 2 h. 3. The F ion in anodized TiO2 nanotube layer was removed after heat-treatment at 500 ℃. 4. The bone conduction of TiO2 nanotube layer was more enhanced by precalcification treatment in the solution containing calcium and phosphate ions.

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