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Influence of Pore Characteristics on Electrochemical and Biological Behavior of Ti Foams

机译:孔隙特征对Ti泡沫电化学和生物行为的影响

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摘要

This study reports on titanium (Ti) foams produced using the powder metallurgy technique. During the investigation, the cross-sectional area and perimeter distributions of the pores within the foam were measured. Metallographic image processing analysis software combined with scanning electron microscopic images demonstrated that the pore size and circularity were affected by varying the volume percentage of the space-holder material. The corrosion resistance was investigated using electrochemical impedance spectroscopy and cyclic polarization tests. MG-63 osteoblast-like cells were used to study the biocompatibility and to evaluate the cell attachment, viability, and alkaline phosphatase activity. Analytical results indicated that 50 and 60 vol.% samples were suitable for biomedical applications. Because of the high degree of interconnectivity in the 60 and 70% porosity samples, the electrochemical parameters produced similar results. The corrosion rate of the porous samples showed that the amount of dissolved Ti was at an acceptable level that can be ejected by the body. Applying a fluoridated hydroxyapatite coating significantly increased the osteoblast cell functions on the porous surface.
机译:本研究报告了使用粉末冶金技术生产的钛(Ti)泡沫。在调查期间,测量泡沫内孔的横截面积和周边分布。金相图像处理分析软件与扫描电子显微镜相结合,通过改变空间架材料的体积百分比,影响孔径和圆形度。使用电化学阻抗光谱和循环偏振试验研究了耐腐蚀性。使用Mg-63骨质细胞样细胞来研究生物相容性并评价细胞附着,活力和碱性磷酸酶活性。分析结果表明50和60体积。%样品适用于生物医学应用。由于60和70%孔隙率样本中的高度相互互连,电化学参数产生了类似的结果。多孔样品的腐蚀速率显示溶解的Ti的量是可接受的水平,其可以被体内喷射。涂覆氟化羟基磷灰石涂层显着增加了多孔表面上的成骨细胞功能。

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