Effect of medial displacement calcaneal osteotomy on ankle kinematics in a cadaver model

James D. Michelson, Mark Mizel, Peter Jay, Guy Schmidt

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24 Scopus citations


Although medical displacement calcaneal osteotomy has been advocated for treatment of acquired pes planus, no studies have determined the biomechanical consequences at the ankle of such a procedure. The present investigation examined the alteration in ankle motion that resulted from a medial sliding calcaneal osteotomy. In dorsiflexion, the ankle specimens were found to have altered internal rotation and varus alignment. At maximal dorsiflexion, there was a 76% increase in internal rotation (4.4°± 2.5°versus 2.5°± 1.7°for intact ankles, P < 0.004) and an increase of 425% in varus (0.42 °± 0.56°versus 0.08°± 0.34°for intact ankles, P < 0.003). There were no significant differences seen in plantar flexion. Based on these results, caution is advised in the indiscriminate use of medial sliding osteotomies, because this procedure may predispose the patient to premature ankle arthritis as a consequence of the altered ankle motions.

Original languageEnglish (US)
Pages (from-to)132-136
Number of pages5
JournalFoot and Ankle International
Issue number3
StatePublished - Mar 1998

ASJC Scopus subject areas

  • Surgery
  • Orthopedics and Sports Medicine


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