Scientific article

Cup size and risk of dislocation after primary total hip arthroplasty

Published inThe Journal of arthroplasty, vol. 26, no. 8, p. 1305-1309
Publication date2011

We evaluated the relationship between cup diameter and dislocation risk in patients undergoing primary total hip arthroplasty (THA) with a 28-mm head. There were 50 dislocations, 28 of which occurred in 2221 (1.3%) THAs with a cup diameter smaller than 56 mm and 22 in 513 (4.3%) with a cup diameter of 56 mm or larger. Dislocation risk varied between 0.6% and 2.4% in the smaller cup group and between 4.1% and 5.2% in the larger cup group. The risk was substantially higher in the large cup group (unadjusted odds ratio, 3.5; 95% confidence interval, 2.0-6.2). Multivariable logistic regression revealed an adjusted odds ratio of 2.4 (95% confidence interval, 1.2-4.9). Patients with THA (28-mm head) had more than twice the risk of dislocation with cup size of 56 mm or higher compared to patients with smaller cups.

  • Aged
  • Aged, 80 and over
  • Arthroplasty, Replacement, Hip/instrumentation/methods
  • Cohort Studies
  • Female
  • Femur Head/pathology/surgery
  • Hip Dislocation/epidemiology
  • Hip Joint/surgery
  • Hip Prosthesis
  • Humans
  • Incidence
  • Logistic Models
  • Longitudinal Studies
  • Male
  • Middle Aged
  • Osteoarthritis, Hip/surgery
  • Prospective Studies
  • Prosthesis Design
  • Prosthesis Failure
  • Retrospective Studies
  • Risk Factors
  • Treatment Outcome
Citation (ISO format)
PETER, Robin et al. Cup size and risk of dislocation after primary total hip arthroplasty. In: The Journal of arthroplasty, 2011, vol. 26, n° 8, p. 1305–1309. doi: 10.1016/j.arth.2010.11.015
Main files (1)
Article (Published version)
ISSN of the journal0883-5403

Technical informations

Creation11/21/2012 11:17:00 AM
First validation11/21/2012 11:17:00 AM
Update time03/14/2023 5:48:56 PM
Status update03/14/2023 5:48:56 PM
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