Clinical Orthopaedics and Related Research

, Volume 466, Issue 5, pp 1186–1192

Alumina Inlay Failure in Cemented Polyethylene-backed Total Hip Arthroplasty

  • Kentaro Iwakiri
  • Hiroyoshi Iwaki
  • Yukihide Minoda
  • Hirotsugu Ohashi
  • Kunio Takaoka
Original Article Hip

DOI: 10.1007/s11999-008-0168-9

Cite this article as:
Iwakiri, K., Iwaki, H., Minoda, Y. et al. Clin Orthop Relat Res (2008) 466: 1186. doi:10.1007/s11999-008-0168-9

Abstract

Alumina-on-alumina bearings for THA have markedly improved in mechanical properties through advances in technology; however, alumina fracture is still a concern. We retrospectively reviewed 77 patients (82 hips) with cemented alumina-on-alumina THAs to identify factors relating to alumina failure. The mean age of the patients at surgery was 63 years. The prostheses had a cemented polyethylene-backed acetabular component with an alumina inlay and a 28-mm alumina head. Revision surgery was performed because of alumina inlay failure in four hips (three fractures and one dissociation; 5.6%), deep infection in two, and recurrent dislocation in one. The 8-year survival rate was 90.7% with revision for any reason and 94.4% with revision for alumina failure as the end point. There were no differences in age, body mass index, gender, mobility, function, abduction angle, or size of component among the four hips with alumina failure and the remaining 68 hips without it; however, radiolucent lines in the sockets were more apparent in four cases with alumina inlay failure. This alumina-on-alumina THA thus yielded unsatisfactory medium-term results because we observed a high rate of catastrophic alumina inlay failure.

Level of Evidence: Level IV, therapeutic study. See the Guidelines for Authors for a complete description of levels of evidence.

Copyright information

© The Association of Bone and Joint Surgeons 2008

Authors and Affiliations

  • Kentaro Iwakiri
    • 1
  • Hiroyoshi Iwaki
    • 1
  • Yukihide Minoda
    • 1
  • Hirotsugu Ohashi
    • 2
  • Kunio Takaoka
    • 1
  1. 1.Department of Orthopaedic SurgeryOsaka City University Graduate School of MedicineOsakaJapan
  2. 2.Department of Orthopaedic SurgerySaiseikai Nakatsu HospitalOsakaJapan

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