Measurement of polyethylene wear in cementless total hip arthroplasty.


Journal Article

We made a clinical study of polyethylene wear in 240 hips of 187 patients having primary total hip arthroplasties from 1989 to 1990, using uncemented Osteonics components, with a head size of 26 mm. We excluded cups with anteversion of over 20 degrees and measured linear wear by a new method using a digitiser and special software of our design. Follow-up was from two to five years (mean 4.3). The mean age at operation was 50.3 years, with more men than women (1.4:1). The mean linear wear per year was 0.15 mm; this did not increase with the longevity of the prosthesis (p = 0.54). In 59 hips showing evidence of osteolysis, the mean linear wear rate was significantly higher at 0.23 mm/year (p <0.001). The mean linear wear rate also correlated significantly with age at the time of operation (p = 0.008), but we found no significant correlations with body-weight, gender, aetiology of the disease, thickness of polyethylene, or cup position. Our new method of measurement is time-saving and reproducible. The results confirm the greater rate of linear wear of polyethylene in patients showing osteolysis and in those who are younger.

Full Text

Cited Authors

  • Shih, CH; Lee, PC; Chen, JH; Tai, CL; Chen, LF; Wu, JS; Chang, WH

Published Date

  • May 1997

Published In

Volume / Issue

  • 79 / 3

Start / End Page

  • 361 - 365

PubMed ID

  • 9180309

Pubmed Central ID

  • 9180309

Electronic International Standard Serial Number (EISSN)

  • 2044-5377

International Standard Serial Number (ISSN)

  • 0301-620X

Digital Object Identifier (DOI)

  • 10.1302/0301-620x.79b3.6630


  • eng