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The effect of component size and orientation on the concentrations of metal ions after resurfacing arthroplasty of the hip

Lookup NU author(s): Dr Simon Jameson, Professor Tom Joyce

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Abstract

Increased concentrations of metal ions after metal-on-metal resurfacing arthroplasty of the hip remain a concern. Although there has been no proven link to long-term health problems or early prosthetic failure, variables associated with high metal ion concentrations should be identified and, if possible, corrected. Our study provides data on metal ion levels from a series of 76 consecutive patients (76 hips) after resurfacing arthroplasty with the Articular Surface Replacement. Chromium and cobalt ion concentrations in the whole blood of patients with smaller (<= 51 mm) femoral components were significantly higher than in those with the larger (>= 53 mm) components (p < 0.01). Ion concentrations in the former group were significantly related to the inclination (p = 0.01) and anteversion (p = 0.01) of the acetabular component. The same relationships were not significant in the patients with larger femoral components (p = 0.61 and p = 0.49, respectively). Accurate positioning of the acetabular component intra-operatively is essential in order to reduce the concentration of metal ions in the blood after hip resurfacing arthroplasty with the Articular Surface Replacement implant.


Publication metadata

Author(s): Langton DJ, Jameson SS, Joyce TJ, Webb J, Nargol AVF

Publication type: Article

Publication status: Published

Journal: Journal of Bone and Joint Surgery: British Volume

Year: 2008

Volume: 90B

Issue: 9

Pages: 1143-1151

ISSN (print): 0301-620X

Publisher: British Editorial Society of Bone and Joint Surgery

URL: http://dx.doi.org/10.1302/0301-620X.90B9.20785

DOI: 10.1302/0301-620X.90B9.20785


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