为解决经皮器械长期生物密封问题,选择具有三维支架结构和合适的表面微孔多孔钛作为其皮下固定材料,表面预沉积一层类骨磷灰石,空白样品作为对照,皮下植入兔子的背部.术后40天和70天对样品与周围软组织间的结合强度进行测定,并对断口处组织与材料间的结合形貌和区域成分进行分析.结果表明,随着时间的延长,不同表面特征的材料与组织的结合强度都不断增大;表面具有类骨磷灰石层的样品无论是结合强度还是结合形态都优于空白样品,涂层样品40天时与组织的结合强度几乎与对照样品70天时与组织的结合强度相当.说明类骨磷灰石层在体内有利于较早形成活跃的细胞材料表面,有助于皮下结缔组织的长入以及与材料表面的牢固结合.
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