“…The incidence of avascular necrosis is rather surprising: however, Mindell et al (1963) observed the phenomenon in two out of 10 patients. Studies of the blood supply to the talus (Haliburton et al 1958, Mulfinger & Trueta 1970, Petterson et al 1974 indicate that the body of the talus is supplied mainly by the tarsal canal artery. The latter may be damaged by the dislocation and, in the presence of fracture of the posterior tubercle-as seen in one of our patients in whom necrosis occurred-the vascularization will suffer additionally.…”