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Related Experiment Videos

Fabellar impingement after total knee replacement--a case report

J W Wang1

  • 1Department of Orthopaedic Surgery, Chang Gung Memorial Hospital, Kaohsiung, Chang Gung Medical College, Taiwan, R.O.C.

Changgeng Yi Xue Za Zhi
|June 1, 1995
PubMed
Summary
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Fabellar impingement can cause unusual knee pain after total knee replacement. Removing large fabellae during surgery can prevent these postoperative complications.

Area of Science:

  • Orthopedic Surgery
  • Biomedical Engineering

Background:

  • Total knee replacement (TKR) is a common procedure for knee arthrosis.
  • Fabellae are small sesamoid bones within the gastrocnemius tendon that can vary in size.

Observation:

  • A patient developed postoperative knee pain due to impingement of a large fabella on the knee prosthesis.
  • The contralateral knee, which had a simultaneous fabellectomy, remained asymptomatic.

Findings:

  • Preoperative lateral radiographs identified large fabellae in both knees.
  • The symptomatic knee showed a large fabella impinging on the TKR prosthesis.
  • Surgical excision of the fabella resolved the postoperative pain and tenderness.

Implications:

Related Experiment Videos

  • Preoperative screening for large fabellae (over 1 cm) is crucial before TKR.
  • Simultaneous fabellectomy during TKR may prevent fabellar impingement complications.
  • This case highlights an uncommon cause of persistent knee pain after TKR.