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A multi-laboratory, simulator study investigated the wear of polytetrafluorethylene (PTFE) cups run in bovine serum. Each laboratory used its own test protocol with a variety of simulator types. Our wear model incorporated 32mm dia CoCr heads matched to PTFE cups run with serum protein-concentrations in the range 17–69mg/ml. The multi-lab data demonstrated that protein-concentration had the most significant...
The objective of this study was to compare the effects of static, sinusoidal and physiological load-profiles on wear of Al 2 O 3 –PTFE materials. This was an accelerated wear model of clinical relevance. In nine experiments, the peak load-levels were varied from 1 to 4kN in a hip simulator with multi-directional kinematics and with bovine serum used as the lubricant. Systematic wear...
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