Kabo J M, Gebhard J S, Loren G, Amstutz H C
Biomechanics Research Section, University of California School of Medicine, Los Angeles 90024-1795.
J Bone Joint Surg Br. 1993 Mar;75(2):254-8. doi: 10.1302/0301-620X.75B2.8444946.
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.
对翻修手术中取出的聚乙烯髋臼杯采用影像测量技术测定线性磨损，并将测量值与X线片测量值进行比较。尽管X线片测量值略微低估了实际磨损，但二者之间存在密切相关性。表面置换组件的平均线性磨损率远高于股骨头直径达32mm的传统假体。使用新公式计算的体积磨损小于先前体内研究报告的结果，且在数量级上与体外实验磨损测试结果相似。表面置换组件的体积磨损率最高，对于传统组件，其体积磨损率随组件直径呈线性增加。
