Background: The flexor to extensor transfer of the flexor digitorum longus (FDL) tendon has been a relatively common operative procedure for the treatment of a flexible hammer toe deformity and chronic metatarsophalangeal (MTP) joint dislocation. A possible complication of using the tunnel technique rather than the tendon splitting technique is iatrogenic fracture through the drilled tunnel site. The purpose of this investigation was to study the FDL tendon and proximal phalanx dimensions in the area of the transfer procedure in order to improve preoperative planning and minimize postoperative complications.
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