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Related Experiment Videos

Revision of failed knee replacements using fixed-axis hinges.

A E Inglis1, P S Walker

  • 1Department of Biomedical Engineering, Royal National Orthopaedic Hospital, Stanmore, Middlesex, England.

The Journal of Bone and Joint Surgery. British Volume
|September 1, 1991
PubMed
Summary
This summary is machine-generated.

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Revision of failed knee hinged arthroplasties often requires specialized implants. Repeated revisions increase complication risks, particularly femur fractures, indicating bone loss is a significant concern.

Area of Science:

  • Orthopedic Surgery
  • Biomedical Engineering

Background:

  • Hinged knee arthroplasties are used for severe knee instability.
  • Revision of failed hinged knee implants presents significant challenges.

Purpose of the Study:

  • To evaluate outcomes of revising failed hinged knee arthroplasties.
  • To identify complications associated with revision surgeries.

Main Methods:

  • Retrospective analysis of 40 failed hinged knee arthroplasties.
  • Revision involved similar or elongated stemmed hinged implants.
  • Second and third revisions were performed for persistent failures.

Main Results:

  • Femur fracture at the stem tip was a frequent complication.

Related Experiment Videos

  • 16 first revisions failed, requiring second revisions.
  • Second revisions had a higher complication rate, with some needing distal femoral or proximal tibial replacement.

    • Conclusions:

    • Failure of hinged knee arthroplasties leads to substantial bone loss, primarily in the femur.
    • Revising with a similar hinged prosthesis design is often unsuccessful.
    • Revision surgeries, especially multiple ones, carry a high risk of complications like femur fracture.