Curtis technique for correcting recurrent hyperextension and locking of proximal interphalangeal joint. A, Palmar view of flexor tendons. B, One half of flexor digitorum sublimis tendon has been divided at bifurcation of tendon. Hole has been drilled in proximal phalanx. C, Freed half of tendon has been carried deep to flexor digitorum profundus tendon to opposite side of proximal phalanx, threaded through hole in bone, and anchored with pull-out suture under enough tension to cause slight flexion contracture of proximal interphalangeal joint. SEE TECHNIQUE 72.13.