Crack initiation in retrieved cross-linked highly cross-linked ultrahigh-molecular-weight polyethylene acetabular liners: an investigation of 9 cases.
Crack initiation in retrieved cross-linked highly cross-linked ultrahigh-molecular-weight polyethylene acetabular liners: an investigation of 9 cases.
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DOI：
10.1016/j.arth.2010.07.016
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发表时间：
2011-08
影响因子：
3.5
通讯作者：
Rimnac, Clare M.
中科院分区：
文献类型：
--
作者：
Furmanski, Jevan;Kraay, Matthew J.;Rimnac, Clare M.
在翻修手术中取出9个交联UHMWPE髋臼衬套。其中8个衬垫在回收时完好无损，功能正常。六个案例在边缘缺口的根部含有浅的初始裂纹；一条裂缝已经扩展了几毫米。裂纹表面的光学和电子显微镜检查显示了蛤壳痕迹，这是疲劳裂纹的特征。在灾难性交联衬垫失效的报告中已经确定了缺口处的裂纹起裂，裂纹起裂位置表现出相似的形态和蛤壳标记。因此，我们相信在这个案例系列中发现的浅裂缝是灾难性边缘断裂的前兆。本研究的结果建议进一步的调查，以澄清在交联髋臼衬垫开裂的病因和患病率。
Nine cross-linked UHMWPE acetabular liners were retrieved at revision surgery. Eight of the liners were fully intact and functional at retrieval. Six cases contained shallow initiated cracks at the root of rim notches; one crack had propagated several millimeters. Optical and electron microscopic inspection of the crack surfaces revealed clam shell markings, which are characteristic of fatigue crack initiation. Crack initiation at notches has been identified in reports of catastrophic cross-linked liner failures, with cracks initiation sites exhibiting similar morphology and clam shell markings. Thus, we believe the shallow cracks identified in this case series are precursors to catastrophic rim fracture. The results of this study recommend further investigations to clarify the etiology and prevalence of crack initiation in cross-linked acetabular liners.
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DOI：
10.5435/00124635-200800001-00019
发表时间：
2008-01-01
影响因子：
3.2
作者：
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影响因子：
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发表时间：
2004-04-01
影响因子：
5.3
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DOI：
10.2106/00004623-197860020-00014
发表时间：
1978-01-01
影响因子：
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作者：
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