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A comparative tribological study of the wear of composite cushion cups in a physiological hip joint simulator.

Abstract：

:A composite cushion acetabular cup for a total hip replacement has been designed and developed jointly by Leeds University and DePuy International. In order to assess the long-term performance of this novel design, two sets of simulator tests of more than 4 million cycles duration have been carried out with the cushion bearings using the Leeds PA hip joint simulator with bovine serum as the lubricant. The results of these simulator tests were compared to the results from a previously reported study that used 32 mm ultrahigh molecular weight polyethylene (UHMWPE) acetabular cups. Under a physiological walking cycle simulation, with continuous cyclic motion and loading, the composite cushion cups produced negligible wear compared to a volumetric wear rate of 32 mm3 per million cycles for the conventional UHMWPE acetabular cups. This study has demonstrated for the first time the beneficial effects of fluid film lubrication in reducing wear in composite cushion acetabular cups.

journal_name

J Biomech

journal_title

Journal of biomechanics

authors

Bigsby RJ,Auger DD,Jin ZM,Dowson D,Hardaker CS,Fisher J

doi

10.1016/s0021-9290(98)00034-7

subject

Has Abstract

pub_date

1998-04-01 00:00:00

pages

363-9

issue

4

eissn

0021-9290

issn

1873-2380

pii

S0021-9290(98)00034-7

journal_volume

31

pub_type

杂志文章

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