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. ©2008 British Editorial Society of Bone and Joint Surgery.
CITATION STYLE
Langton, D. J., Jameson, S. S., Joyce, T. J., Webb, J., & Nargol, A. V. F. (2008). The effect of component size and orientation on the concentrations of metal ions after resurfacing arthroplasty of the hip. Journal of Bone and Joint Surgery - Series B, 90(9), 1143–1151. https://doi.org/10.1302/0301-620X.90B9.20785
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