Subtalar joint stability. Talocalcaneal interosseous ligament function studied in cadaver specimens

Gary A. Knudson, Harold B. Kitaoka, Chun Liang Lu, Zong Ping Luo, Kai Nan An

Research output: Contribution to journalArticlepeer-review

37 Scopus citations


We used 6 fresh-frozen foot specimens to evaluate the contribution of the talocalcaneal interosseous ligament (IOL) in stabilizing the subtalar (talocalcaneal) joint. The tibia and ankle joint were secured, and the calcaneus was subjected to a bending and axial force applied circumferentially. The position of the calcaneus relative to the talus was monitored with a magnetic tracking system. Motion was recorded at every half degree in the 0°to 360°are before and after sectioning of the IOL. The results in the intact feet indicated that, with circumferential loading of the subtalar joint, there were two stable zones (supination stable zone, pronation stable zone) during which little displacement occurred and two transition zones during which the supination and pronation movement occurred. There was a greater degree of supination displacement after IOL sectioning (p = 0.008), but no pronation displacement. The IOL contributed substantially to subtalar joint stability, particularly in supination.

Original languageEnglish (US)
Pages (from-to)442-446
Number of pages5
JournalActa Orthopaedica Scandinavica
Issue number5
StatePublished - 1997

ASJC Scopus subject areas

  • Surgery
  • Orthopedics and Sports Medicine


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