Journal
JOURNAL OF ARTHROPLASTY
Volume 30, Issue 10, Pages 1781-1786Publisher
CHURCHILL LIVINGSTONE INC MEDICAL PUBLISHERS
DOI: 10.1016/j.arth.2015.04.040
Keywords
arthroplasty; hip; modular; titanium; ions
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Funding
- Wright Medical Technologies (Memphis, Tennessee)
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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. (c) 2015 Elsevier Inc. All rights reserved.
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