This book comprehensively discusses the basic and practical aspects of foot and ankle surgery applied to all pathologies resulting from instabilities of these joints, a condition that remains underestimated. Uniquely, it not only addresses injuries to the lateral ankle ligaments, but also examines injuries to the deltoid-spring ligament complex, the syndesmotic and chopart joint ligaments, as well as peritalar instability – all pathologies that have often been neglected in the past.