Ninety percent of hip dislocations are posterior and present with internal rotation and adduction, while 10% are anterior and present with external rotation and abduction. The initial physical examination and AP pelvic radiograph is usually sufficient to make the diagnosis; however, additional views, such as Judet views, may be needed to evaluate for associated fractures. Traumatic dislocations of the native hip should be reduced within 6 hours to reduce the risk of long-term complications such as avascular necrosis and posttraumatic arthritis. Due to the high incidence of associated injuries, a thorough trauma evaluation is necessary.
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