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Related Experiment Videos

Dislocation after total hip arthroplasty: a single surgeon's experience.

B E Heithoff1, J J Callaghan, D D Goetz

  • 1Department of Orthopaedic Surgery, University of Iowa Health Care, Iowa City, Iowa 52242, USA.

The Orthopedic Clinics of North America
|November 2, 2001
PubMed
Summary
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Dislocations after arthroplasty can occur years later, with modular 22mm components posing the highest risk. Constrained liners may reduce revision rates for dislocation.

Area of Science:

  • Orthopedic Surgery
  • Biomedical Engineering

Background:

  • Arthroplasty is a common procedure for joint replacement.
  • Dislocation remains a significant complication following arthroplasty.
  • Long-term data on dislocation rates are crucial for patient management.

Purpose of the Study:

  • To evaluate the incidence and timing of dislocations after primary arthroplasty.
  • To identify risk factors associated with dislocation, including implant components.
  • To assess the effectiveness of constrained liners in revision arthroplasty for dislocation.

Main Methods:

  • Retrospective analysis of a single surgeon's practice over 26 years.
  • Review of patient records to identify dislocation events and timing.
  • Comparison of dislocation rates based on implant component type, specifically modular 22mm components.

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Main Results:

  • Dislocations continue to occur long after the initial arthroplasty.
  • Over a quarter of dislocations occurred more than 2 years post-surgery.
  • Modular 22mm components were associated with the highest dislocation rates.
  • Constrained liners demonstrated a reduced dislocation rate in revision cases.

Conclusions:

  • Arthroplasty dislocations can have a late onset, requiring long-term patient awareness.
  • Caution is advised when using modular 22mm components due to their association with high dislocation rates.
  • Constrained liners are effective in managing recurrent dislocations during revision surgery.