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Eleven-year results of the ABG I hip replacement

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Abstract

The ABG I uncemented hip prosthesis has demonstrated an unacceptably high failure rate and poor functional outcome in our patients. A prospective review was performed of 38 implanted hips with a mean follow-up of 11 years. Sixteen hips have been revised or are candidates for revision hip surgery, due principally to polyethylene wear and pelvic osteolysis. Contributing factors were likely to be the poor wear characteristics of the polyethylene liners—which were gamma irradiated in air—and the thinness of these liners. Of further concern were the poor pain and function scores in the remaining hips [mean Harris Hip Scores (HHS) of 70 (SD 22) at 11-year follow-up]. The influence of the surgical learning curve on clinical results may have been an important factor. Undersized femoral components were associated with poor pain and functional scores in five patients with HHS < 60. All ABG I hip implants must remain under careful, long-term review.

Résumé

La prothèse de hanche non cimentée ABG I a montré un taux d’échec inacceptable et un mauvais résultat fonctionnel chez nos patients. Une revue prospective de 38 hanches opérées avec un suivi moyen de 11 ans est présentée. Seize hanches ont été réopérées ou vont l’être, principalement à cause de l’usure du polyethylène et de l’ostéolyse pelvienne. Les facteurs principaux étaient la mauvaise résistance à l’usure du composant PE qui était gamma-irradié et de faible épaisseur. De plus, les hanches restantes avaient un mauvais résultat pour la douleur et la fonction (score moyen de Harris de 70 à 11 ans). La courbe d’apprentissage était peut-être un facteur important du résultat clinique. Les implants fémoraux sous-dimensionnés étaient associés à des mauvais scores chez cinq patients (<60). Tous ces implants doivent rester sous surveillance étroite pour le suivi à long terme.

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Correspondence to W. Y. Kim.

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Kim, W.Y., Muddu, B.N. Eleven-year results of the ABG I hip replacement. International Orthopaedics (SICO 30, 182–184 (2006). https://doi.org/10.1007/s00264-006-0075-1

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