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Type: Journal article
Title: Wear of highly crosslinked polyethylene acetabular components: a review of RSA studies
Author: Callary, S.
Solomon, L.
Holubowycz, O.
Campbell, D.
Munn, Z.
Howie, D.
Citation: Acta Orthopaedica, 2015; 86(2):159-168
Publisher: Informa Healthcare
Issue Date: 2015
ISSN: 1745-3674
Statement of
Stuart A Callary, Lucian B Solomon, Oksana T Holubowycz, David G Campbell, Zachary Munn, and Donald W Howie
Abstract: Background and purpose - Wear rates of highly crosslinked polyethylene (XLPE) acetabular components have varied considerably between different published studies. This variation is in part due to the different techniques used to measure wear and to the errors inherent in measuring the relatively low amounts of wear in XLPE bearings. We undertook a scoping review of studies that have examined the in vivo wear of XLPE acetabular components using the most sensitive method available, radiostereometric analysis (RSA). Methods - A systematic search of the PubMed, Scopus, and Cochrane databases was performed to identify published studies in which RSA was used to measure wear of XLPE components in primary total hip arthroplasty (THA). Results - 18 publications examined 12 primary THA cohorts, comprising only 260 THAs at 2-10 years of follow-up. The mean or median proximal wear rate reported ranged from 0.00 to 0.06 mm/year. However, differences in the manner in which wear was determined made it difficult to compare some studies. Furthermore, differences in RSA methodology between studies, such as the use of supine or standing radiographs and the use of beaded or unbeaded reference segments, may limit future meta-analyses examining the effect of patient and implant variables on wear rates. Interpretation - This scoping review confirmed the low wear rates of XLPE in THA, as measured by RSA. We make recommendations to enhance the standardization of reporting of RSA wear results, which will facilitate early identification of poorly performing implants and enable a better understanding of the effects of surgical and patient factors on wear.
Keywords: Acetabulum; Humans; Prosthesis Failure; Polyethylene; Arthroplasty, Replacement, Hip; Hip Prosthesis; Radiostereometric Analysis
Rights: Open Access - This article is distributed under the terms of the Creative Commons Attribution Noncommercial License which permits any noncommercial use, distribution, and reproduction in any medium, provided the source is credited.
RMID: 0030011374
DOI: 10.3109/17453674.2014.972890
Appears in Collections:Orthopaedics and Trauma publications

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