Archives of Orthopaedic and Trauma Surgery

, Volume 131, Issue 12, pp 1731–1737

Eight-year wear analysis in Longevity highly cross-linked polyethylene liners comparing 26- and 32-mm heads

  • Ichiro Nakahara
  • Nobuo Nakamura
  • Masaki Takao
  • Takashi Sakai
  • Takashi Nishii
  • Nobuhiko Sugano
Hip Arthroplasty

DOI: 10.1007/s00402-011-1360-z

Cite this article as:
Nakahara, I., Nakamura, N., Takao, M. et al. Arch Orthop Trauma Surg (2011) 131: 1731. doi:10.1007/s00402-011-1360-z

Abstract

Introduction

Although wear reduction of highly cross-linked polyethylene has been demonstrated to be independent of femoral head diameter in some simulation studies, the clinical effects of femoral head diameter on wear of highly cross-linked polyethylene sockets remain unclear. We compared the in vivo wear of Longevity highly cross-linked polyethylene liners at 8-year follow-up using 26- or 32-mm cobalt-chromium heads.

Materials and methods

A retrospective cohort study was performed on 90 cementless total hip arthroplasties (THAs) using Longevity highly cross-linked polyethylene liners combined with 26- (45 THAs) or 32-mm (45 THAs) cobalt-chromium heads. Annual radiographs were analyzed using PolyWare computer-assisted methods and linear and volumetric total head penetration rates and linear and volumetric steady-state wear rates were compared.

Results

The two groups showed similar background data, and no significant differences were identified between groups in total head penetration rate or steady-state wear rate. Steady-state wear rates were negligible. Osteolysis was not observed in any hips in either group.

Conclusions

At the 8-year follow-up, wear of the Longevity was the same irrespective of the use 26- or 32-mm heads.

Keywords

Wear Highly cross-linked polyethylene Head diameter Osteolysis Total hip arthroplasty 

Copyright information

© Springer-Verlag 2011

Authors and Affiliations

  • Ichiro Nakahara
    • 1
  • Nobuo Nakamura
    • 2
  • Masaki Takao
    • 1
  • Takashi Sakai
    • 1
  • Takashi Nishii
    • 1
    • 3
  • Nobuhiko Sugano
    • 1
    • 3
  1. 1.Department of Orthopaedic SurgeryOsaka University Graduate School of MedicineSuitaJapan
  2. 2.Department of Orthopaedic SurgeryKyowakai HospitalSuitaJapan
  3. 3.Department of Orthopaedic Medical EngineeringOsaka University Graduate School of MedicineSuitaJapan

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