针对当前钛种植体在临床使用中因界面不匹配导致的种植失败问题,从仿生学角度出发,采用提拉法在钛表面涂覆聚氨酯(PU)高分子涂层,并通过过饱和Ca-P溶液浸泡试验在PU表面原位矿化生成了无机沉积物.采用SEM、EDX、IR、XRD、DSC-TG及接触角测定仪等对矿化后PU表面的理化性能进行了表征和分析,并通过细胞培养试验初步考察了MG63细胞在矿化前后PU表面的增殖及生长情况.结果表明,PU表面矿化物是由纳米片状晶体先聚集堆叠形成团簇状微球,然后微球间互相融合生长而形成的,其成分主要是弱结晶的非化学计量的羟基磷灰石晶体,而且矿化后的PU涂层亲水性更佳,更利于MG63细胞的黏附及增殖.
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