ABSTRACT
Equinus or plantarflexion deformity of the ankle is a very common deformity that can develop in several congenital and acquired conditions encountered in paediatric orthopaedic practice. Although equinus of congenital origin may occur as an isolated deformity, it is often part of a more complex deformity such as clubfoot, convex pes valgus or equinovalgus deformity of fibular hemimelia. Equinus deformity often develops as a consequence of contracture of the gastrocnemius, soleus or both the muscles. Much less frequently it may arise due to primary abnormality of the ankle joint or due to growth abnormality of the distal tibial growth plate. When there is an equinus deformity initial contact is made with the forefoot rather than the heel. In children with a long-standing equinus deformity, the tibiofibular ligaments become contracted and will not yield sufficiently to permit movement of the anterior part of the talus into the ankle mortise. If the equinus remains uncorrected metatarsalgia can develop later in adult life.
