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논문 기본 정보
- 자료유형
- 학술저널
- 저자정보
- 발행연도
- 2011.3
- 수록면
- 33 - 41 (9page)
- DOI
- 10.14815/kjdm.2011.03.38.1.33
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초록· 키워드
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This study was performed to investigate bioactivity of precalcified nanotubular TiO2 layer on Ti-Nb-X (X = Zr, Mo) alloy system with low elastic modulus. Two kinds of Ti alloy containing Ti-29Nb-4Mo-0.6Zr and Ti-32Nb-5Zr were melted by using a vacuum furnace and sample ingots were cut with 20×10×1 mm in dimensions. Specimens were polished sequentially from #220 to #1000 SiC paper, ultrasonically washed with acetone, alcohol, and then rinsed with deionized water, and dried in an oven at 50℃ for 24 hours. The electrolyte solution for anodic oxidation was consisted of a glycerol solution containing 1 wt% NH<SUB>4</SUB>F and 20 wt% deionized water. Pulse signals with a potential of 20 V and current density of 20 mA/cm<SUP>2</SUP> were applied for 60 minutes. Anodized specimens were precalcified by soaking in NaH<SUB>2</SUB>PO<SUB>4</SUB> solution at 80℃ for 30 minutes followed by soaking in saturated Ca(OH)<SUB>2</SUB> solution at 100℃ for 30 minutes and heat-treated at 500℃ for 2 hours. The shapes of nanotubes on Ti-32Nb-5Zr alloy were 71.2±5.0 nm in diameters and 1299.2±72.2 nm in length in glycerol solution containing 20 wt% H2O and 1 wt% NH4F at 20 V, which was shorter by half in diameter and two times longer in length than pure titanium. The bioactivity of nanotubular TiO<SUB>2</SUB> layer on Ti-32Nb-5Zr alloy was improved with precalcification treatment in 0.5 M NaH<SUB>2</SUB>PO<SUB>4</SUB> at 80℃ and saturated Ca(OH)<SUB>2</SUB> solution at 100℃. The precalcification effect of pure titanium was higher than that of Ti-32Nb-5Zr alloy. MC3T3-E1 osteoblast cell adhesion on precalcified nanotubular TiO<SUB>2</SUB> surface showed a pronounced protrusion of filopodia and a higher degree of contact with nanotubular surface. Round highly differentiated MC3T3-E1 cells were seen on precalcified Ti-32Nb-5Zr alloy compared to pure titanium.
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UCI(KEPA) : I410-ECN-0101-2015-510-001125180