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Quantification of self-polishing in vivo from explanted metal-on-metal total hip replacements

Lookup NU author(s): Professor Tom Joyce, Dr Harriet Grigg, David Langton

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Abstract

One of the claimed advantages of metal-on-metal total hip replacements is that they 'self-polish' in the body, however this assertion has not been supported by quantitative data. Two pairs of components, each consisting of a femoral head and acetabular cup, were obtained at revision surgery. They were subject to topographical analysis using a non-contacting profilometer. In the 'worn' regions a reduction in surface roughness was seen alongside a change in skewness values from positive to negative, while elastohydrodynamic theory suggested an improvement towards mild mixed lubrication during gait. Therefore self-polishing of metal-on-metal total hip replacements can occur in vivo. (C) 2010 Elsevier Ltd. All rights reserved.

Publication metadata

Author(s): Joyce TJ, Grigg H, Langton DJ, Nargol AVF

Publication type: Article

Publication status: Published

Journal: Tribology International

Year: 2011

Volume: 44

Issue: 5

Pages: 513-516

Print publication date: 16/04/2011

ISSN (print): 0301-679X

ISSN (electronic): 1879-2464

Publisher: Pergamon

URL: http://dx.doi.org/10.1016/j.triboint.2010.04.007

DOI: 10.1016/j.triboint.2010.04.007

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