Abstract
Nutcracker fractures of the tarsal navicular and cuboid usually result from dislocations of the midtarsal (Chopart's) joint. The classic pathomechanism consists of forced adduction or abduction (medial or lateral stress) mostly in combination with axial force. The resulting injuries are frequently misjudged or underestimated with respect to their potential consequences for global foot function. Radiographic imaging includes plain radiographs in exact standard projections and computed tomographic scanning. Classification of Chopart fracture-dislocations is based on the proposed pathomechanics and the direction of the dislocating force. The goals of open reduction and stable internal fixation of Chopart fracture-dislocations are realignment of the medial and lateral columns of the foot, restoration of joint congruity and temporal transfixation in case of ligamentous instability to ensure proper ligament healing.
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