Modified Elmslie operation (Chrisman-Snook). A, Split of peroneus brevis tendon. B, Mobilized half of peroneus brevis tendon threaded through anterior talocalcaneal ligament (held by sutures) and through hole in fibula. C, Completed reconstruction (see text). D, Modification of original operation with end of graft sutured to its anterior portion at anterior end of fibular tunnel. E to G, As an alternative, a semitendinosus allograft can be used. SEE TECHNIQUE 90.5.