Five-year results of the uncemented RM pressfit cup clinical evaluation and migration measurements by EBRA

J Arthroplasty. 2013 Sep;28(8):1291-6. doi: 10.1016/j.arth.2012.11.004. Epub 2013 Mar 20.

Abstract

This was a prospective consecutive, study of 50 patients (mean age 72 years, 56% males) treated unilaterally for primary osteoarthrosis using the uncemented, isoelastic, monoblock RM Pressfit Cup. Migration and wear were assessed using the EBRA (Ein-Bild-Röntgen-Analyse) software (201 radiographs from 36 patients). Mean migration was 0.82 mm after 2 years and 1.25 mm after 5 years. A decreasing migration rate over the period was observed. The mean annual wear rate was 0.09 mm/y. Five years after surgery, 84% of patients reached good or excellent Harris hip score values. No revisions related to the acetabular component were necessary. All cups appeared to have high primary stability.

Keywords: EBRA; RM Pressfit Cup; migration; total hip arthroplasty.

MeSH terms

  • Aged
  • Algorithms
  • Arthroplasty, Replacement, Hip*
  • Female
  • Follow-Up Studies
  • Hip Joint / diagnostic imaging*
  • Hip Joint / surgery
  • Hip Prosthesis*
  • Humans
  • Incidence
  • Joint Instability / epidemiology
  • Longitudinal Studies
  • Male
  • Osteoarthritis, Hip / surgery
  • Prospective Studies
  • Prosthesis Design
  • Prosthesis Failure*
  • Radiography
  • Retrospective Studies
  • Software
  • Treatment Outcome