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Related Experiment Videos

Patellar tendon rupture after total knee arthroplasty.

J A Rand1, B F Morrey, R S Bryan

  • 1Department of Orthopedics, Mayo Clinic, Rochester, Minnesota 55905.

Clinical Orthopaedics and Related Research
|July 1, 1989
PubMed
Summary

Patellar tendon ruptures after total knee arthroplasty (TKA) are rare but challenging to treat, with discouraging outcomes. Avoiding deep infection is critical for better results in these high-risk patients.

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Area of Science:

  • Orthopedic Surgery
  • Biomaterials Science
  • Reconstructive Surgery

Background:

  • Patellar tendon rupture is a known complication following total knee arthroplasty (TKA).
  • This complication can significantly impair knee function and patient outcomes.
  • Identifying risk factors and optimizing treatment strategies are crucial for managing these challenging cases.

Purpose of the Study:

  • To evaluate the incidence and outcomes of patellar tendon ruptures after TKA.
  • To assess the effectiveness of different surgical repair methods.
  • To identify factors associated with complications and poor results.

Main Methods:

  • Retrospective review of 18 patellar tendon ruptures in 17 patients treated between 1973 and 1985.
  • Analysis of patient history, including prior procedures like distal patellar realignment and knee manipulation.

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  • Evaluation of surgical treatments including xenograft reconstruction and staple fixation.
  • Assessment of follow-up outcomes, including functional recovery and complication rates, particularly deep infection.

    • Main Results:

    • Patellar tendon ruptures occurred in 0.17% of TKAs during the study period.
    • Four ruptures were associated with prior distal patellar realignment, and one with knee manipulation.
    • Surgical repair outcomes were poor: only 2 xenograft reconstructions and 2 of 4 staple fixations were successful.
    • Four knees developed deep infection after patellar tendon rupture repair.

    Conclusions:

    • Patellar tendon rupture after TKA is associated with discouraging treatment outcomes.
    • Deep infection is a significant complication that must be avoided.
    • Patients with limited preoperative motion and difficult surgical exposure during primary TKA may be at higher risk.