Format

Send to

Choose Destination
J Arthroplasty. 2016 Jan;31(1):137-41. doi: 10.1016/j.arth.2015.07.045. Epub 2015 Aug 29.

In Vivo Wear Performance of Cobalt-Chromium Versus Oxidized Zirconium Femoral Total Knee Replacements.

Author information

1
Orthopaedic Innovation Centre, Winnipeg, MB, Canada.
2
London Health Sciences Centre, London, ON, Canada.
3
Concordia Joint Replacement Group, Winnipeg, MB, Canada.

Abstract

This study examines the damage and wear on the polyethylene (PE) inserts from 52 retrieved Genesis II total knee replacements to identify differences in tribological performance between matched pairs of cobalt-chromium (CoCr) and oxidized zirconium (OxZr) femoral components. Observer damage scoring and microcomputed tomography were used to quantify PE damage and wear, respectively. No significant differences were found between CoCr and OxZr groups in terms of PE insert damage, surface penetration, or wear. No severe damage such as cracking or delamination was noted on any of the 52 PE inserts. Observer damage scoring did not correlate with penetrative or volumetric PE wear. The more costly OxZr femoral component does not demonstrate clear tribological benefit over the standard CoCr component in the short term with this total knee replacement design.

KEYWORDS:

cobalt chromium; damage; oxidized zirconium; polyethylene; total knee replacement; wear

PMID:
26424405
DOI:
10.1016/j.arth.2015.07.045
[Indexed for MEDLINE]

Supplemental Content

Full text links

Icon for Elsevier Science
Loading ...
Support Center