Cement migration after THR -: A comparison of Charnley Elite and Exeter femoral stems using RSA
Cement migration after THR -: A comparison of Charnley Elite and Exeter femoral stems using RSA
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DOI：
10.1302/0301-620x.81b1.8904
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发表时间：
1999-01-01
影响因子：
--
通讯作者：
Murray, DW
中科院分区：
文献类型：
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作者：
Alfaro-Adrián, J;Gill, HS;Murray, DW
使用X线立体摄影测量分析（RSA）的研究表明，骨水泥型全髋关节置换术（THR）的股骨部件相对于骨向远端迁移，但尚不清楚这是否发生在骨水泥-植入物或骨水泥-骨界面或骨水泥鞘内。我们的目的是确定这种迁移发生的位置，因为这对植入物的功能和失效方式具有重要意义。使用RSA，我们对两种不同设计的THR（埃克塞特和Charnley Elite）的股骨柄尖端和骨水泥限制器的迁移进行了两年的比较。我们假设，如果骨水泥限制器发生迁移，则至少部分骨水泥鞘也会发生迁移。我们的结果表明，埃克塞特在不同界面处向远端迁移的速度是Charnley Elite的3倍。对于埃克塞特，迁移发生在骨水泥-植入物界面，而对于Charnley Elite，骨水泥-骨和骨水泥-植入物界面均发生迁移。
Studies using roentgen stereophotogrammetric analysis (RSA) have shown that the femoral components of cemented total hip replacements (THR) migrate distally relative-to the bone, but it is not clear whether this occurs at the cement-implant or the cement-bone interface or within the cement mantle. Our aim was to determine where this migration occurred, since this has important :implications for the way in which implants function and fail.Using RSA we compared for two years the migration of the tip of the stem with that of the cement restrictor for two different designs of THR, the Exeter and Charnley Elite. We have assumed that if the cement restrictor migrates, then at least part of the cement mantle also migrates.Our results have shown that the Exeter migrates distally three times faster than the Charnley Elite and at different interfaces. With the Exeter migration was at the cement-implant interface whereas with the Charnley Elite there was migration at both the cement-bone and the cement-implant interfaces.