Abstract

The aim of this study was to assess the ability of weight bearing computer tomography (CT) scans to detect subtalar joint instability. Seven pairs of fresh frozen male cadavers (tibial plateau to toe-tip) were tested. Eight radiographic measurements were performed to assess the congruency of the subtalar joint on digitally reconstructed radiographs (DRRs) and single CT images. Axial loading did not impact most measurements, whereas torque did impact most measurements. Measurements to assess the subtalar joint stability should primarily be performed at the subtalar joint level rather than at the ankle joint level when using weight bearing CT scans.

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