Cup inclination and serum concentration of cobalt and chromium after metal-on-metal total hip arthroplasty

We investigated whether cup inclination influences serum levels of cobalt and chromium after metal-on-metal total hip arthroplasty. Out of a consecutive series, 3 groups of 20 patients each were established according to their cup inclination: greatest inclination (55°–63°, mean 58°), intermediate in...

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Bibliographic Details
Published in:The Journal of arthroplasty 2004-12, Vol.19 (8), p.66-70
Main Authors: Brodner, Wolfram, Grübl, Alexander, Jankovsky, Rafael, Meisinger, Vanee, Lehr, Stephan, Gottsauner-Wolf, Florian
Format: Article
Language:English
Subjects:
Adult
Aged
Aged, 80 and over
Arthroplasty, Replacement, Hip
Chromium - blood
Cobalt - blood
cup inclination
Humans
metal-on-metal
Middle Aged
Prosthesis Design
serum chromium
serum cobalt
total hip arthroplasty
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Description
Summary:We investigated whether cup inclination influences serum levels of cobalt and chromium after metal-on-metal total hip arthroplasty. Out of a consecutive series, 3 groups of 20 patients each were established according to their cup inclination: greatest inclination (55°–63°, mean 58°), intermediate inclination (44°–46°, mean 45°), and smallest inclination (23°–37°, mean 33°). We did not detect any statistically significant difference of serum cobalt ( P = .23) or serum chromium ( P = .13) levels between the 3 groups applying the Kruskal Wallis test. However, 3 patients with cup inclinations of 58°, 63°, and 61° exhibited 9.8–53.6-fold elevated cobalt and 9.5–30.5-fold elevated chromium levels when compared with the median concentrations of this trial. We therefore recommend accurate cup placement also for metal-on-metal articulations.
ISSN:0883-5403
1532-8406
DOI:10.1016/j.arth.2004.09.003