The Roentgenographic Study of Subtalar Instability

Eight men and 8 women with or without sprain were analysed using subtalar stress films and ankle stress filsms We measured the anterior displacement of the calcaneus compared with the talus using two different methods. The amount of anterior displacement of the calcaneus measured by ankle stress films related to the displacement shown by subtalar stress films. Therefore I concluded that it was possible to evaluate sub talar instability using ankle stress films.