Fig. 3From: Morphological characteristics of the posterior malleolar fragment according to ankle fracture patterns: a computed tomography-based studya The occurrence of posteriormalleolar fractures in the supination-external rotation stage IV injury is mainly caused by the rotational force. b The posterior malleolar fracture in the pronation-external rotationstage IV injury may have occurreddue to a combination of rotational and axial forcesBack to article page