Correction of the cavus foot using external fixation.

Cavus deformity is of soft tissue, bony, or combined origin and is either static or progressive. The treatment algorithm depends on these factors. Bony deformities are treated by acute osteotomy or gradual distraction osteotomies, whereas soft tissue contractures are treated by soft tissue releases or distraction. External fixation is a powerful tool to obtain correction of the cavus deformity. It must be supplemented with soft tissue balancing procedures, such as tendon transfer and orthotic management, to maintain the correction in progressive cavus deformities.