Ligamentous disruption varies according to the type of dislocation. Neurovascular injury is the principal concern, as with any dislocation. Vascular compromise may result in avascular necrosis of the talus if not promptly reduced. Tented skin may be subject to ischemic necrosis. This presumably is related to their increased risk overall for traumatic injury.
Postmenopausal women are at higher risk for associated fractures.
Increased fracture risk probably is related to osteoporotic changes in this subset of patients. A detailed history regarding the mechanism of injury often helps predict the type of injuries to expect. Furthermore, an understanding of the injury mechanism aids treatment, since an opposite force is required in reduction of the joint. Four types of dislocations are seen around the ankle joint. Posterior A posterior dislocation in the most common type of ankle dislocation.