Methods Three special particles of ultra high molecular weight polyethylene(UHMWPE), Ti 6Al 4V and Co Cr Mo were used respectively to induce the change of periimplant bone structure of a well fixed implant made of titanium alloy in rabbit femur or tibia.

• 方法 本实验采用扫描电镜技术对钛合金（Ti?6Al?4V）、钴－ 铬－ 钼（Co?Cr?Mo）与聚乙烯（ultra high molecular weight polyethylene，UHMWPE）三种微小颗粒诱导的假体周围骨组织改变进行超微结构观察。