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Complications following conversion of a hip hemiarthroplasty to a total hip arthroplasty

Simcha G Fichman1, Tatu J Mäkinen2, Alex Vincent1

  • 1Mount Sinai Hospital, Division of Orthopaedic Surgery, University of Toronto, 600 University Avenue, Toronto, Ontario, M5G 1X5, Canada.

International Orthopaedics
|July 2, 2015
PubMed

Insights

Conversion of hip hemiarthroplasty to total hip arthroplasty (CTHA) shows similar complication and re-revision rates compared to first-time total hip arthroplasty (THA) revision. Contemporary implants did not significantly alter outcomes in this study.

Area of Science:

  • Orthopedic Surgery
  • Arthroplasty
  • Hip Reconstruction

Background:

  • Conversion of hip hemiarthroplasty to total hip arthroplasty (CTHA) is a complex procedure associated with significant complications.
  • Previous studies indicate high rates of dislocation and early component loosening following CTHA.
  • Contemporary implants aim to improve outcomes in revision hip arthroplasty procedures.

Purpose of the Study:

  • To evaluate the complication rates of CTHA performed with modern implants.
  • To compare the outcomes of CTHA with first-time total hip arthroplasty (THA) revision.

Main Methods:

  • Retrospective matched-cohort study comparing 46 CTHA patients with 46 first-time THA revision patients.
  • Mean follow-up periods of 47 months (CTHA) and 23 months (THA revision).
  • Radiographic evaluation for loosening/failure and clinical assessment using the Harris Hip Score (HHS).

Main Results:

  • Complications requiring re-revision occurred in 10.9% of CTHA patients versus 13.0% in the THA revision group.
  • Recurrent dislocation led to re-revision in 4.3% of CTHA patients.
  • Other re-revisions in the CTHA group were for component loosening and deep infection.

Conclusions:

  • CTHA using contemporary revision implants demonstrated comparable dislocation rates and re-revision rates to first-time THA revision.
  • The findings suggest that CTHA is a viable option when performed with modern implant technology.
Abstract

Keywords:
ConversionDislocationHemiarthroplastyRevisionTotal hip arthroplasty

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