The Journal of Bone and Joint Surgery, Vol 69, Issue 5 706-711, Copyright © 1987 by Journal of Bone and Joint Surgery, Inc
Posteromedial dislocation of the ankle without fracture
MR Colville, JM Colville and A Manoli
We report the results of treatment in eight patients who had posteromedial
dislocation of the ankle without fracture. The ages of seven of the eight
patients ranged from twenty-three to thirty-six years. Four patients had
increased generalized ligamentous laxity. One-half of the injuries were
sustained during athletic competition. The mechanism of injury appeared to
be forced inversion of the foot when it was maximally plantar flexed and
axially loaded. Five of the eight patients had an open injury, and four of
the five patients had an associated injury to the anterolateral
neurovascular structures. No patient had an injury to the distal
tibiofibular ligaments or to the syndesmosis. The three patients who had a
closed dislocation achieved good long-term functional and roentgenographic
results after closed reduction and immobilization. The patients who had an
open injury that was treated by anatomical repair of the disrupted lateral
ligaments at the time of initial debridement also achieved good long-term
functional and roentgenographic results. It does not appear to be necessary
to repair the deltoid ligament. In one patient who had an open dislocation
and in whom the lateral ligaments were not repaired, moderate instability
of the ankle resulted and degenerative changes developed in the joint.