The impact of surface and geometry on coefficient of friction of artificial hip joints

Journal of the Mechanical Behavior of Biomedical Materials
Dipankar ChoudhuryI Křupka

Abstract

Coefficient of friction (COF) tests were conducted on 28-mm and 36-mm-diameter hip joint prostheses for four different material combinations, with or without the presence of Ultra High Molecular Weight Polyethylene (UHMWPE) particles using a novel pendulum hip simulator. The effects of three micro dimpled arrays on femoral head against a polyethylene and a metallic cup were also investigated. Clearance played a vital role in the COF of ceramic on polyethylene and ceramic on ceramic artificial hip joints. Micro dimpled metallic femoral heads yielded higher COF against a polyethylene cup; however, with metal on metal prostheses the dimpled arrays significantly reduced the COF. In situ images revealed evidence that the dimple arrays enhanced film formation, which was the main mechanism that contributed to reduced friction.

Citations

Oct 28, 2018·Biotechnology Journal·Jean-Pierre AlcarazDonald K Martin
Jul 15, 2020·Computer Methods in Biomechanics and Biomedical Engineering·Jinghua XuJianrong Tan
Mar 5, 2018·Journal of the Mechanical Behavior of Biomedical Materials·Dipankar ChoudhuryMin Zou
Apr 18, 2021·Journal of the Mechanical Behavior of Biomedical Materials·Gang ShenFengzhou Fang
Jun 3, 2021·Journal of Functional Biomaterials·Risha RufaquaMartin Hartl
Jun 26, 2021·Journal of Tribology·Quentin Allen, Bart Raeymaekers

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