Medial displacement calcaneal tuberosity osteotomy in the treatment of posterior tibial insufficiency.

The loss of function of the posterior tibial tendon has been associated with a progressive deformity in adults, resulting in a painful flatfoot. Patients who have a painful flatfoot usually develop a valgus deformity of the hindfoot and an abduction deformity of the forefoot. If these deformities are supple, a medial displacement calcaneal tuberosity osteotomy together with a soft tissue repair by talonavicular capsulorraphy and repair of the spring ligament associated with a flexor digitorum tendon transfer to the posterior tibial can result in a satisfactory outcome.