Orthotic Devices for the Foot and Ankle.

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Abstract

[Indexed for MEDLINE] 9. Foot Ankle Clin. 2019 Jun;24(2):173-181. doi: 10.1016/j.fcl.2019.02.001. Epub 2019 Apr 2. Anatomy and Biomechanics of Cavovarus Deformity. Krähenbühl N(1), Weinberg MW(2). Author information: (1)Department of Orthopaedics, University of Utah, 590 Wakara Way, Salt Lake City, UT 84108, USA. Electronic address: nicola.krahenbuhl@hsc.utah.edu. (2)Department of Orthopaedics, University of Utah, 590 Wakara Way, Salt Lake City, UT 84108, USA. A high longitudinal plantar arch, varus position of the heel, forefoot equinus, and pronation of the first ray are characteristic of a cavovarus deformity. Forefoot-driven and hindfoot-driven deformities are distinguished based on pathomechanics. In first ray strong plantarflexion, the forefoot touches the ground first. This leads to compensatory varus heel, lock of the midfoot, reduction of the flexible phase, and decrease in shock absorption. In hindfoot-driven cavovarus deformity, the subtalar joint may compensate for varus deformities above the ankle joint. Overload of the lateral soft tissue structures and degenerative changes may occur in longstanding cavovarus deformity. Copyright © 2019 Elsevier Inc. All rights reserved. DOI: 10.1016/j.fcl.2019.02.001