A Prospective Metal Ion Study of Large-Head Metal-on-Metal Bearing: A Matched-Pair Analysis of Hip Resurfacing Versus Total Hip Replacement

• Autores: Paul E. Beaulé, Paul R. Kim, Amre Hamdi, Anna Fazekas
• Localización: Orthopedic Clinics of North America, ISSN 0030-5898, Vol. 42, Nº. 2, 2011, págs. 251-257
• Idioma: inglés
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• Resumen

  • The current study measured ion release among large-head metal-on-metal hip bearings. Twenty-six patients with a modular, Profemur? TL with A-Class? big femoral head total hip replacement were matched (gender, femoral size, BMI) with a group of 26 patients with the Conserve? Plus implant hip resurfacing. Compared with HR patients, THR patients had higher median serum cobalt ion levels at 6 months (3.26 vs 1.12 ?g/L, P = .002) 1 year (4.51 vs 1.02, P = .002), and 2 years (3.77 vs 1.22, P<.001) following surgery. No differences in chromium ions were observed. Further research is required to determine the clinical significance of elevated serum cobalt ions.