The Role of Flexor Hallucis Longus Tendon Transfer in the Surgical Treatment of Foot Drop.

Foot drop has various etiologies, such as neurologic (peripheral nerve injury, neuropathy, lumbar radiculopathy, and cerebral lesions) or muscular (extensor muscle injury and compartment syndrome) causes. Tendon transfers can aid in the restoration of dorsiflexion in the treatment of foot drop. The tibialis posterior tendon is the primary tendon used in these surgeries for transfer. In this present study, the flexor hallucis longus tendon is transferred to the dorsum of the foot because of following knee dislocation that caused a nonfunctioning posterior tibial tendon. At the sixth month postoperative, the active dorsiflexion angle of the foot was increased to 00 and the American Orthopaedic Foot and Ankle Society score 81 points.