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Total knee arthroplasty after a previous patellectomy

G A Paletta1, R S Laskin

  • 1Hospital for Special Surgery, New York, N.Y. 10021, USA.

The Journal of Bone and Joint Surgery. American Volume
|November 1, 1995
PubMed
Summary

Total knee arthroplasty after patellectomy shows comparable outcomes with both posterior cruciate-sacrificing and posterior cruciate-sparing implants. This study evaluated knee function five years post-surgery.

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Area of Science:

  • Orthopedic Surgery
  • Biomedical Engineering
  • Reconstructive Surgery

Background:

  • Previous patellectomy presents unique challenges for total knee arthroplasty (TKA).
  • Understanding implant performance in patients with prior patella removal is crucial for surgical planning.

Purpose of the Study:

  • To compare the outcomes of TKA with cement in patients who previously underwent patellectomy.
  • To evaluate the efficacy of posterior cruciate-sacrificing versus posterior cruciate-sparing implants in this patient cohort.

Main Methods:

  • Retrospective matched-control analysis of 22 patients undergoing TKA post-patellectomy.
  • Comparison with computer-generated control groups without prior patellectomy.
  • Utilized the Knee Society rating system for pre-operative and 5-year post-operative evaluation.

Main Results:

  • Patients were divided into two groups based on implant type: posterior stabilized (sacrificing PCL) and posterior cruciate-sparing.
  • Outcomes were assessed using the Knee Society rating system five years after total knee arthroplasty.
  • Matched control groups without prior patellectomy were used for comparison.

Conclusions:

  • The study aimed to determine the functional results of total knee arthroplasty in patients with a history of patellectomy.
  • Comparison between posterior cruciate-sacrificing and posterior cruciate-sparing implants was a key focus.
  • Long-term functional outcomes were evaluated using a standardized rating system.

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