In a review of 535 dislocations, seven subastragalar dislocations were found, the incidence of occurrence being 1.3 per cent. It was found that with prompt reduction good functional results could be anticipated. No difference in end results was noted between the cases in which closed reduction was done and those in which reduction was obtained by open operation, although convalescence was somewhat prolonged in the latter cases. Of the seven subastragalar dislocations, an excellent result was obtained in four; the end result in the other three cases is unknown.
Associated fractures of the tarsal and metatarsal bones and of the tibia or fibula, which are common, may complicate treatment and produce permanent disability. A permanent limitation of abduction and adduction of greater or lesser degree may be expected after such violent trauma. Old unreduced dislocations require complete tarsal reconstruction and arthrodesis.