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Related Experiment Videos

Single plane and biplane external fixators for knee arthrodesis

D J Hak1, J R Lieberman, G A Finerman

  • 1University of California Los Angeles, Department of Orthopaedic Surgery, USA.

Clinical Orthopaedics and Related Research
|July 1, 1995
PubMed
Summary

Knee arthrodesis using external fixators achieved a 75% fusion rate, but success decreased with prior surgeries. Complications were common, highlighting challenges in complex cases.

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Area of Science:

  • Orthopedic surgery
  • Biomedical engineering

Background:

  • Knee arthrodesis is a salvage procedure for severe knee joint destruction.
  • External fixators offer a method for knee fusion, particularly in complex cases.

Purpose of the Study:

  • To evaluate the efficacy and complications of knee arthrodesis using external fixators.
  • To identify factors influencing fusion rates in patients undergoing knee arthrodesis.

Main Methods:

  • Retrospective review of 36 knee arthrodeses performed with external fixators.
  • Analysis of single-plane versus biplane fixator designs.
  • Assessment of fusion rates and complications based on patient history and prior procedures.

Main Results:

  • An overall fusion rate of 75% was achieved, with 61% achieving fusion after the initial procedure.

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  • Fusion rates were lower in patients with a history of multiple prior knee procedures.
  • Complications included nonunion (14), pin tract infections (6), and delayed unions (5).

    • Conclusions:

    • Knee arthrodesis with external fixators can achieve fusion, but success is compromised by prior surgical history, especially in infected total knee arthroplasty cases.
    • External fixator design (single vs. biplane) showed similar initial fusion rates.
    • Challenges remain in achieving knee fusion for patients with failed total knee arthroplasty or significant bone loss.