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NiTi合金种植体仿生生长磷灰石涂层及其生物学研究 被引量:5

Study on the Biomimetic HA Formation on NiTi Implant and its Biological Response
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摘要 为赋予NiTi形状记忆合金表面具有生物活性,并探讨类骨磷灰石涂层NiTi作为人工骨修复替代材料的可行性。本研究通过酸碱处理活化NiTi合金,采用仿生方法制备羟基磷灰石涂层,在中国白兔股骨中植入,以无涂层NiTi合金为对照,在植入后15周和26周分别进行组织病理学和超微组织学测试。结果表明仿生生长磷灰石的成分和结构近似于自然骨中的矿物质,晶粒为纳米尺度,是含碳酸根及钙离子缺陷的类骨磷灰石。NiTi/HA植入兔股骨可刺激成骨细胞活跃、增殖,15周后形成完全骨接触界面,且结合状态良好无裂隙。同期NiTi植入体与骨组织间有未吸收的纤维组织,界面结合较差有裂隙。植入26周后,两种种植体与皮质骨均为骨接触。但在髓腔界面,NiTi/HA周围干细胞成骨过程基本完成,新骨紧密包裹种植体;而NiTi表面新骨层残破不全,出现裂隙。说明类骨磷灰石涂层NiTi合金是生物活性材料,有较强的成骨能力,与骨组织间为化学键合。
出处 《中国生物医学工程学报》 CAS CSCD 北大核心 2006年第3期355-360,共6页 Chinese Journal of Biomedical Engineering
基金 国家自然科学基金资助项目(50471048) 高校博士点专项基金(20040056016) 天津市重大科技攻关项目(043186311)。
关键词 NITI形状记忆合金 类骨磷灰石 仿生生长 生物活性 NiTi shape memory alloy bone-like apatite biomimetic formation bioactive
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参考文献19

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