Lateral instability of the ankle treated by a modified Evans procedure.

A technically simple tenodesis of the peroneus brevis tendon has been applied in the treatment of 42 patients with lateral instability of the ankle; 33 patients have been examined 2-10 years after the operation and 91 per cent showed excellent or good results. It is concluded that this procedure gives good stability in the varus as well as the antero-posterior direction and is therefore comparable to the technically more difficult Watson-Jones procedure.