Edge loading in third generation alumina ceramic-on-ceramic bearings
Edge loading in third generation alumina ceramic-on-ceramic bearings
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DOI：
10.1016/j.arth.2003.09.018
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发表时间：
2004-06-01
影响因子：
3.5
通讯作者：
Tuke, MA
中科院分区：
文献类型：
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作者：
Walter, WL;Insley, GM;Tuke, MA
氧化铝陶瓷对陶瓷关节面在标准髋关节模拟器条件下表现非常好，但在体内，一些回收的关节面显示出不寻常的条纹磨损模式。我们研究了从1,588例使用第三代氧化铝陶瓷对陶瓷关节面的非骨水泥型髋关节置换术中取出的16个关节面，以表征条纹磨损形成的机制。这些关节面均未因关节面失效而被回收。股骨头和内衬的平均磨损量分别为0.4 mm 3/年和0.3 mm 3/年。股骨头和内衬上的磨损条纹图显示，大多数磨损不会发生在正常行走时;相反，当髋关节屈曲时，它们可能发生在边缘加载时，例如从椅子上站起来或爬上台阶。(C)2004年爱思唯尔公司All rights reserved.
Alumina ceramic-on-ceramic bearings perform exceptionally well under standard hip simulator conditions, but in vivo some retrieved bearings have shown an unusual stripe pattern of wear. We studied 16 bearings retrieved from a series of 1,588 cementless hip arthroplasties with third generation alumina ceramic-on-ceramic bearings to characterize the mechanism of stripe wear formation. None of these bearings were retrieved for bearing failure. The average wear volume was 0.4 mm 3 per year in the heads and 0.3 mm(3) per year in the liners. Mapping of wear stripes on the heads and liners showed that the majority do not occur with normal walking; instead they probably occur with edge loading when the hip is flexed, such as with rising from a chair or with climbing a high step. (C) 2004 Elsevier Inc. All rights reserved.