Extensor Hallucis Longus Coaptation to Tibialis Anterior: A Treatment for Paralytic Drop Foot

Abstract

Between June 1982 and April 1983, a procedure to coapt the extensor hallucis longus (EHL) to the tibialis anterior was performed in eight post-polio patients to correct drop foot and to enable the EHL to be a more efficient dorsiflexor of ankle. Although at early follow-up, every patient was able to actively dorsiflex the ankle against gravity, at final review, (mean follow-up 7.8 years), only two patients could still do so. Three patients developed a cock-up toe deformity or dorsiflexion deformity of great toe. We have attributed the poor final results to stretching of the coaptation. Use of splints or orthosis for a longer period postoperatively and a more carefully designed physical therapy may have yielded better results. Alternatively, if the EHL is anchored to navicular bone better results may be obtained.