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Publication Details
AFRICAN RESEARCH NEXUS
SHINING A SPOTLIGHT ON AFRICAN RESEARCH
medicine
Ceramic-on-metal bearings in total hip replacement: Whole blood metal ion levels and analysis of retrieved components
Journal of Bone and Joint Surgery - Series B, Volume 91, No. 9, Year 2009
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Description
This study reports on ceramic-on-metal (CoM) bearings in total hip replacement. Whole blood metal ion levels were measured. The median increase in chromium and cobalt at 12 months was 0.08 μg/1 and 0.22 μg/1, respectively, in CoM bearings. Comparable values for metal-on-metal (MoM) were 0.48 μg/1 and 0.32 μg/1. The chromium levels were significantly lower in CoM than in MoM bearings (p = 0.02). The cobalt levels were lower, but the difference was not significant. Examination of two explanted ceramic heads revealed areas of thin metal transfer. CoM bearings (one explanted head and acetabular component, one explanted head and new acetabular component, and three new heads and acetabular components) were tested in a hip joint simulator. The explanted head and acetabular component had higher bedding-in. However, after one million cycles all the wear rates were the same and an order of magnitude less than that reported for MoM bearings. There were four outliers in each clinical group, primarily related to component malposition. ©2009 British Editorial Society of Bone and Joint Surgery.
Authors & Co-Authors
Isaac, Graham H.
United Kingdom, Leeds
University of Leeds
Brockett, C.
United Kingdom, Leeds
University of Leeds
Breckon, A.
United Kingdom, Leeds
University of Leeds
South Africa, Johannesburg
Orthomedics (pty) Ltd.
van der Jagt, Dick Ronald
United Kingdom, Leeds
University of Leeds
South Africa, Johannesburg
Charlotte Maxeke Johannesburg Academic Hospital
Williams, S.
United Kingdom, Leeds
University of Leeds
Hardaker, C.
United Kingdom, Leeds
University of Leeds
United States, Warsaw
Depuy Synthes
Fisher, J.
United Kingdom, Leeds
University of Leeds
Schepers, Anton
United Kingdom, Leeds
University of Leeds
South Africa, Johannesburg
Charlotte Maxeke Johannesburg Academic Hospital
Statistics
Citations: 67
Authors: 8
Affiliations: 4
Identifiers
Doi:
10.1302/0301-620X.91B9.22306
ISSN:
0301620X
Research Areas
Health System And Policy