INVIVO WEAR OF POLYETHYLENE ACETABULAR COMPONENTS
INVIVO WEAR OF POLYETHYLENE ACETABULAR COMPONENTS
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DOI：
10.1302/0301-620x.75b2.8444946
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发表时间：
1993-03-01
影响因子：
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通讯作者：
AMSTUTZ, HC
中科院分区：
文献类型：
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作者：
KABO, JM;GEBHARD, JS;AMSTUTZ, HC
通过阴影技术测量翻修手术中取出的聚乙烯髋臼杯，以确定线性磨损，并将数值与X线片获得的数值进行比较。它们之间存在密切的相关性，尽管放射学测量略微低估了真实磨损。表面置换组件的平均线性磨损率远大于那些传统的假体与股骨头直径达32 mm的体积磨损，使用一个新的公式计算，被发现是小于以前报道的体内，和类似的幅度在体外实验磨损测试的结果。体积磨损率是最大的表面置换组件，对于传统的组件，被发现以线性方式增加组件直径。
Polyethylene acetabular cups retrieved at revision surgery were measured by a shadowgraph technique to determine linear wear, and the values were compared with those obtained from radiographs. There was a close correlation between them, although the radiographic measurements slightly underestimated the true wear. Average linear wear rates for surface-replacement components were much greater than those for conventional prostheses with femoral heads up to 32 mm in diameter.Volumetric wear, calculated using a new formula, was found to be less than previously reported in vivo, and similar in magnitude to the results of experimental wear tests in vitro. The volumetric wear rates were greatest for the surface-replacement components and, for conventional components, were found to increase in a linear manner with component diameter.