In vivo surface wear mechanisms of femoral components of cemented total hip arthroplasties -: The influence of wear mechanism on clinical outcome
In vivo surface wear mechanisms of femoral components of cemented total hip arthroplasties -: The influence of wear mechanism on clinical outcome
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DOI：
10.1016/s0883-5403(03)00278-x
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发表时间：
2004-01-01
影响因子：
3.5
通讯作者：
Ling, RSM
中科院分区：
文献类型：
--
作者：
Howell, JR;Blunt, LA;Ling, RSM
对172个回收的股骨假体进行了股骨柄磨损的外观和机制研究，其中74个股骨柄在体内保持稳定。使用了宏观、微观和纳米级的检查尺度。因微动（磨损）而导致的阀杆表面损失被发现影响 93% 的阀杆。然而，肉眼通常很难看到变化，并且在 19% 的情况下，如果不使用光学显微镜，这些变化就会被完全忽略。假体的表面光洁度决定了柄磨损的机制。哑光表面表现出典型的磨损过程，也会损坏水泥，从水泥和金属表面释放颗粒碎片。这可能会破坏骨水泥内的茎的稳定性。抛光后的阀杆呈现出典型的微动外观，阀杆表面保留有碎屑，并且对水泥没有明显损坏。哑光和抛光阀杆磨损机制的这些差异对阀杆功能有显着影响。
The appearance and mechanism of femoral stem wear was studied in 172 retrieved femoral components, of which 74 stems had been stable in vivo. Macroscopic, microscopic, and nano-level scales of examination were used. Loss of stem surface in response to micromotion (wear) was found to affect 93% of stems. However, changes were frequently difficult to see with the naked eye, and in 19% of cases they would have been missed completely without the use of light microscopy. The surface finish of the prosthesis determined the mechanism of stem wear. Matte surfaces showed typical abrasive processes that also damage the cement, releasing particulate debris from the cement and metal surfaces. This may destabilize the stem within the cement. Polished stems showed a typical fretting appearance with retention of debris on the stem surface and without significant damage to the cement. These differences in wear mechanism between matte and polished stems have significant effects on stem function.