纯钛表面阳极氧化电压对成骨细胞早期黏附及伸展的影响

目的:通过成骨细胞离体培养试验,观察不同阳极氧化电压对成骨细胞早期黏附及伸展的影响。方法:分别在电压为140V、200V及260V,电流密度为70A/m2等条件下,在0.03mol/L甘油磷酸钙(Ca-GP)和0.15mol/L醋酸钙混合电解液中,对纯钛样本表面进行阳极氧化处理。对阳极氧化后样本的平均粗糙度进行测量,并在其表面进行人成骨细胞培养,对早期细胞黏附及伸展等情况进行研究。采用SPSS13.0forWindows统计分析软件中的单因素方差分析进行统计学处理。结果:纯钛表面平均粗糙度为0.17μm,经阳极氧化后,随电压升高,平均粗糙度分别为0.23μm、0.26μm及0.33μm,统计学分析表明有显著性差异(P<0.05)。经过2h细胞培养后,阳极氧化处理后,纯钛表面细胞骨架发生形态学改变,且随阳极氧化电压的增高,细胞形态不规则呈现升高的趋势。统计分析结果表明,260V电压阳极氧化组,细胞黏附数显著高于对照组(P<0.05)。结论:阳极氧化处理可改善纯钛表面特性,成骨细胞在其表面的黏附及伸展等早期细胞行为受阳极氧化电压的影响。

Effects of voltage during anodization on titanium surface on cell attachment and spreading of osteoblasts

PURPOSE: The effects of the voltage during anodic oxidation on cell attachment and spreading of human osteoblasts in early stage were investigated. METHODS: The samples were anodized in the electrolyte of 0.03 M calcium glycerophosphate (Ca-GP) mixed with 0.15 M calcium acetate (CA) under current density of 70 A/m2 and different voltages, 140V, 200V or 260V. The surface roughness of the specimens and the attachment and spreading of human osteoblasts in early stage were investigated. SPSS13.0 for windows was used for one-way ANOVA. RESULTS: The surface average roughness of cp Ti was significantly improved from 0.17 micro m to 0.23 micro m, 0.26 micro m, 0.33 micro m, respectively, by anodic oxidation with increased voltage (P<0.05). After 2 hours of cell culture, cell skeleton was reorganized and cell morphology became more irregular with the increase of anodizing voltages. Cell attachment on the specimens anodized under 260V was significantly higher than on the surface of cp Ti (P<0.05). CONCLUSION: The surface properties of cp Ti can be affected by anodic oxidation. The early cell attachment and spreading were enhanced with anodizing voltage.