TiO2 나노튜브를 형성한 Ti-6Al-4V 합금의 석회화 순환처리가 생체활성도에 미치는 영향 (Effect of Cyclic Pre-calcification on the Bioactivity of Ti-6Al-4V Alloy Modified by Nonotubular TiO2 Layer)

서지정보

· 발행기관 : 대한치과재료학회
· 수록지 정보 : 대한치과재료학회지 / 43권 / 3호 / 223 ~ 230페이지
· 저자명 : 송재주, 한아름, 정세진, 석홍병, 변선미, 임청하

초록

The purpose of this study was to evaluate the effect of calcium phosphate treatment on the bioactivity of Ti-6Al-4V alloy modified by anodic oxidation, pre-calcification treatment, and heat treatment. Anodic oxidation were performed to increase specific surface area and form nanotubular TiO2 layer (AH). After that, pre-calcification treatment was carried out in NaH2PO4 solution and Ca(OH)2 saturated solution for 10 cycles (APH 10) and 30 cycles (APH 30) to induce the precipitation of calcium phosphates on surface. Additionally, the specimens were heat treated for structural stability and elimination of remaining impurities. The nanotubes were shown densely on the AH group. APH 10 and 30 groups showed the precipitated calcium phosphate on the nanotubular TiO2 layer, but the APH 30 group showed more precipitation of calcium phosphate. Additionally, APH 10 and 30 groups showed the precipitation of HAp after immersion in SBF for 3 days. Compared to the untreated group, the surface treatment groups (AH, APH 10, and APH 30) showed a significant increase in surface roughness (p < 0.05), and the APH 30 group showed the highest surface roughness. Contact angle was decreased significantly in the surface treated groups compared to the untreated group (p < 0.05), and wettability was highest in APH 30 group. Consequently, we found out that APH 30 group greatly improved bioactivity by formation of nanotubular TiO2 layer and HAp precipitation.

영어초록

The purpose of this study was to evaluate the effect of calcium phosphate treatment on the bioactivity of Ti-6Al-4V alloy modified by anodic oxidation, pre-calcification treatment, and heat treatment. Anodic oxidation were performed to increase specific surface area and form nanotubular TiO2 layer (AH). After that, pre-calcification treatment was carried out in NaH2PO4 solution and Ca(OH)2 saturated solution for 10 cycles (APH 10) and 30 cycles (APH 30) to induce the precipitation of calcium phosphates on surface. Additionally, the specimens were heat treated for structural stability and elimination of remaining impurities. The nanotubes were shown densely on the AH group. APH 10 and 30 groups showed the precipitated calcium phosphate on the nanotubular TiO2 layer, but the APH 30 group showed more precipitation of calcium phosphate. Additionally, APH 10 and 30 groups showed the precipitation of HAp after immersion in SBF for 3 days. Compared to the untreated group, the surface treatment groups (AH, APH 10, and APH 30) showed a significant increase in surface roughness (p < 0.05), and the APH 30 group showed the highest surface roughness. Contact angle was decreased significantly in the surface treated groups compared to the untreated group (p < 0.05), and wettability was highest in APH 30 group. Consequently, we found out that APH 30 group greatly improved bioactivity by formation of nanotubular TiO2 layer and HAp precipitation.

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