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

다국어 초록 (Multilingual Abstract)

The purpose of this study was to investigate the bone conduction of Ti-6Al-4V alloy modified by anodic oxidation and preca lcification 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 simula ted body f luid with pH 7 .4 a t 36.5℃ for 10 days. The results obtained were summarized as follows; 1. Vertically-oriented self-organized TiO2 n a notubes of d iameters 6 0.0~90.0 nm were f abrica ted by a nodizing 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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