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Related Experiment Videos

Total knee arthroplasty after patellectomy

A B Joshi1, C M Lee, L Markovic

  • 1Centre for Hip Surgery, Wrightington Hospital for Joint Disease, Wigan, Lancashire, UK.

The Journal of Bone and Joint Surgery. British Volume
|November 1, 1994
PubMed
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Total knee arthroplasty (TKA) after patellectomy leads to poorer outcomes and higher complication rates. Prior patellectomy significantly impacts TKA success, increasing risks like instability and persistent pain.

Area of Science:

  • Orthopedic Surgery
  • Biomedical Engineering

Background:

  • Patellectomy, the surgical removal of the kneecap, can alter knee biomechanics.
  • Previous patellectomy may present unique challenges for total knee arthroplasty (TKA).

Purpose of the Study:

  • To compare TKA outcomes in patients with prior patellectomy versus those with an intact patella.
  • To evaluate complication rates and functional results following TKA in knees with a history of patellectomy.

Main Methods:

  • Retrospective comparison of 19 patients who underwent TKA after patellectomy with a matched control group.
  • Mean follow-up duration of 63 months (range: 21-114 months).

Main Results:

  • The study group (prior patellectomy) experienced poor outcomes in five patients.

Related Experiment Videos

  • Complications included coronal plane instability (3 patients), persistent pain (4 patients), and supracondylar fractures (3 patients).
  • The overall complication rate in the patellectomy group was 36%, compared to zero complications in the control group.

    • Conclusions:

    • Total knee arthroplasty in knees with prior patellectomy is associated with a significantly higher complication rate.
    • Inferior functional results and increased risks of instability and pain are observed after TKA in patients with a history of patellectomy.