The unstable knee: Wobble and Buckle

M. P. Abdel, S. B. Haas

Research output: Contribution to journalArticlepeer-review

21 Scopus citations


Instability after total knee replacement (TKR) accounts for 10% to 22% of revision procedures. All patients who present for evaluation of instability require a thorough history to be taken and physical examination, as well as appropriate imaging. Deep periprosthetic infection must be ruled out by laboratory testing and an aspiration of the knee must be carried out. The three main categories of instability include flexion instability, extension instability (symmetric and asymmetric), and genu recurvatum. Most recently, the aetiologies contributing to, and surgical manoeuvres required to correct, flexion instability have been elucidated. While implant design and patient-related factors may certainly contribute to the aetiology, surgical technique is also a significant factor in all forms of postoperative instability.

Original languageEnglish (US)
Pages (from-to)112-114
Number of pages3
JournalBone and Joint Journal
Issue number11
StatePublished - Nov 1 2014

ASJC Scopus subject areas

  • Surgery
  • Orthopedics and Sports Medicine


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