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Related Experiment Videos

A comedy of errors: the bad knee.

Hugh U Cameron1

  • 1Orthopaedic and Arthritic Institute, Sunnybrook and Women's College Health Sciences Centre, 318-43 Wellesley Street East, Toronto, Ontario, Canada M4Y 1H1.

The Journal of Arthroplasty
|July 2, 2005
PubMed
Summary
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Total knee revision surgery addresses issues like loosening, wear, and stiffness. Minor errors in component placement are now a common cause of unsatisfactory outcomes, with 16% of femoral components needing correction.

Area of Science:

  • Orthopedic Surgery
  • Biomedical Engineering
  • Arthroplasty Research

Background:

  • Total knee replacement (TKR) is a common procedure for end-stage knee osteoarthritis.
  • Revision TKR is performed to address complications or failures of the primary TKR.
  • Established reasons for revision include aseptic loosening, wear, and stiffness.

Purpose of the Study:

  • To identify the primary reasons for total knee revision in a consecutive series.
  • To evaluate the incidence of component malplacement as a cause for revision.
  • To determine the frequency of femoral component derotation during revision surgery.

Main Methods:

  • Retrospective review of 241 consecutive total knee revision cases.
  • Analysis of indications for revision surgery.

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  • Documentation of intraoperative findings, including component positioning and need for correction.

    • Main Results:

    • Aseptic loosening, wear, and stiffness remain significant indications for revision.
    • Minor errors in tibial and femoral component placement are increasingly recognized as a cause of unsatisfactory outcomes.
    • Approximately 16% of femoral components required intraoperative derotation during revision procedures.

    Conclusions:

    • Component malplacement, particularly rotational errors, is a growing concern in total knee revision surgery.
    • Attention to precise component alignment during primary TKR may reduce the need for future revisions.
    • Further research into optimal surgical techniques for component placement is warranted.