A Case of Subtalar Anterolateral Dislocation.

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A rare case of subtalar anterolateral dislocation, is reported. The patient was a 62 year-old male who was injured when his car fell into a 30m deep ravine while being reversed.There was an open wound on the innerside of the left ankle joint, and the medial tibial condyle and head of the talus were exposed. Roentgenograms showed a subtalar anterolateral dislocation and fracture of the sustentaculum tali. Open reduction was immediately performed under spinal anesthesia. The bone was fixed with Kirscher wires and a plaster cast applied postoperatively.The Kirschner wires were removed 3 weeks postoperatively and the plaster cast was removed after 6 weeks. The patient was allowed full weight bearing 8 weeks postoperatively. One year after the accident, the patient had no pain and was doing very well.The mechanism causing the subtalar dislocation is considered to be as follows: lateral dislocation occurred because of forsed dorsal flexion of the ankle joint and eversion of the foot. The anterior dislocation was caused by application of force posteriorly to the leg and heel. Therefore, a combination of lateral and anterior dislocation mechanism occurring at the time of the fall caused the anterolateral dislocation.
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