Classification of calcaneal fractures by spiral computed tomography: implications for surgical treatment
We have studied the radiographic and Cf features of120 displaced intra-articular fractures of the calcaneum in order todefine the pathological anatomy. In 96% of cases, theCFscansidentifiedthreemainfragments: sustentacular, lateral joint and body. The sustentacular fragment was often rotated into yams, the lateral joint fragment into valgus and the body fragment impacted upwards, in varus and displaced laterally. The displacement of these fragments varied according to which of three fracture types was present, as defined by the composition of the fractured lateral wall of the calcaneum. In type 1 it was formed by the lateral joint fragment alone; in type 2 by both body and lateral joint fragments; and in type 3 by the body fragment alone. Fracture fragment displacement differs fromthat previously described, in that true uniform depression of the lateraijoint fragment is rare.