Key result
Artificial hip joints incorporating compliant layers demonstrated coefficients of friction of the order of 5 × 10-3, up to an order of magnitude lower than currently used prostheses.
Why the study?
Do artificial hip joints incorporating compliant layers reduce friction compared to currently used prostheses?
Do artificial hip joints incorporating compliant layers reduce friction compared to currently used prostheses?
Answers are grounded in this paper and cite their sources.
Artificial hip joints with compliant layers demonstrate significantly lower friction in simulator testing, suggesting potential for reduced wear in clinical application.
A new generation of hip replacements has been designed incorporating compliant layers to promote fluid film lubrication when the joints are implanted in patients. Tests in the Durham hip function simulator show that the friction in these joints is up to an order of magnitude lower than in currently used prostheses, and because this is due to complete separation of the rubbing surfaces, wear ought to be vastly reduced. Experiments have shown that the best results are achieved with compliant surfaces of hardness between 4 and 8 N/mm2. Such surfaces produce coefficients of friction of the order of 5 × 10-3.
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Unsworth et al. (1988) studied Artificial Hip Joints. Artificial hip joints incorporating compliant layers vs. Currently used prostheses was evaluated on Coefficient of friction. Artificial hip joints incorporating compliant layers demonstrated coefficients of friction of the order of 5 × 10-3, up to an order of magnitude lower than currently used prostheses.
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