Publication Date
9-1-2020
Journal
Arthroplasty Today
DOI
10.1016/j.artd.2020.04.006
PMID
32514421
PMCID
PMC7267711
PubMedCentral® Posted Date
6-2-2020
PubMedCentral® Full Text Version
Post-print
Published Open-Access
yes
Keywords
Total hip arthroplasty, Cross-linked polyethylene, Wear, Outcome, Implant design
Abstract
BACKGROUND: Cross-linked polyethylene (XLPE) liners have shown lower wear rates than conventional polyethylene liners in total hip arthroplasty. The primary aim of our study was to report our most recent analysis of wear rates and clinical outcomes of a third-generation XLPE liner. Secondary aims were to investigate the rate of adverse events related to mechanical failure or oxidation of this liner.
METHODS: A series of 266 total hip arthroplasties using a specific XLPE liner were retrospectively reviewed. Radiographs were examined to determine linear and volumetric wear rates and presence of osteolysis. Clinical outcomes, revision rates, mechanical failures, and risk factors for accelerated polyethylene wear were additionally investigated.
RESULTS: The mean age at the time of surgery was 65.8 years and the mean follow-up was 5.5 years. The mean linear wear rate was 0.003 mm/year and the mean volumetric wear rate was 0.42 mm
CONCLUSION: Wear rates for this third-generation XLPE liner were low at mid-term follow-up, and no adverse sequelae of oxidation or deleterious mechanical properties were observed. This remained true regardless of femoral head size and material or patient age and body mass index. Further analysis will be necessary to ensure continued wear resistance, oxidative stability, and mechanical strength at long-term follow-up.
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