THE PERFORMANCE OF MIXED MANUFACTURER METAL ON METAL TOTAL HIP REPLACEMENTS

R. Cook, B. Bolland, S. Tilley, J. Latham
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引用次数: 3

Abstract

Using a femoral head from one manufacturer on the stem of another manufacturer poses the risk that the taper interface between the components do not contact correctly and the performance of the joint will be impaired. The cohorts in this study are a combination of modular Birmingham Hip Resurfacing (BHR) and Adept femoral heads on CPT stems. The study reviews the geometry of the taper interfaces to establish if the taper clearance angles was outside of the normal range for other taper interfaces. In addition the rates of material loss from the bearings and taper and a ranking of the stem damage were reviewed to determine if the levels of loss were above that seen for other similar joints. The material loss analysis demonstrated that the rates or levels of loss from the bearings, taper and stem are no different to levels published for manufacturer matched joints and in many cases are lower. The results demonstrate that the taper clearance angles for the mixed manufacturer joints (BHR-CPT: 0.067 to −0.116, Adept-CPT: 0.101 to −0.056) were within the range of other studies and manufacturer matched clearances (0.134 to −0.149). Using components from different manufacturers has not in this instance increased the level of material loss from the joints, when compared to other similar manufacturer matched joints.
混合制造商金属在金属全髋关节置换术中的性能
将一个制造商的股骨头用在另一个制造商的股骨头上有可能导致组件之间的锥形界面不能正确接触,从而损害关节的性能。本研究的队列是模块化伯明翰髋关节表面置换(BHR)和CPT柄上的Adept股骨头的组合。研究回顾了锥度界面的几何形状,以确定锥度间隙角是否超出了其他锥度界面的正常范围。此外,还审查了轴承和锥度的材料损失率以及阀杆损伤等级,以确定损失水平是否高于其他类似接头。材料损耗分析表明,轴承、锥度和阀杆的损耗率或水平与制造商发布的匹配接头的水平没有什么不同,在许多情况下甚至更低。结果表明,混合制造商接头的锥度间隙角(BHR-CPT: 0.067至- 0.116,Adept-CPT: 0.101至- 0.056)在其他研究和制造商匹配的间隙(0.134至- 0.149)范围内。与其他类似制造商匹配的接头相比,使用不同制造商的组件在这种情况下不会增加接头的材料损失水平。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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