Abstract
The goal of this study is to evaluate serum levels of chromium (Cr), cobalt (Co),
and titanium (Ti) within the first two years following total hip arthroplasty using
a Ti modular neck system. Twenty-five patients were randomized to a metal-on-metal
(MoM) bearing with an all CoCr shell, and the remaining 25 received a metal-on-polyethylene
(MoP) with a Ti shell. Serum levels demonstrated increases for Cr, Co, and Ti at 1 year
(P < .001). MoM had similar Ti levels to MoP hips at 1 year (P = 0.11) but lower at 2 years (P = 0.03). Results suggest that the passive corrosion (i.e., chemical, pitting, and crevice
corrosion) of exposed non-articular metal surfaces may be a greater source of ions
than the neck-stem or head-neck interfaces.
Keywords
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Article info
Publication history
Published online: May 09, 2015
Accepted:
April 20,
2015
Received:
December 3,
2014
Footnotes
Source of Funding: This study was partially funded by Wright Medical Technologies (Memphis, Tennessee). The study design and enrollment was otherwise independent.
One or more of the authors of this paper have disclosed potential or pertinent conflicts of interest, which may include receipt of payment, either direct or indirect, institutional support, or association with an entity in the biomedical field which may be perceived to have potential conflict of interest with this work. For full disclosure statements refer to http://dx.doi.org/10.1016/j.arth.2015.04.040.
Identification
Copyright
© 2015 Elsevier Inc. Published by Elsevier Inc. All rights reserved.
