title: Irreducible traumatic dislocations of the hip.
abstract: Little attention has been paid to the various causes preventing or blocking a concentric reduction following traumatic dislocation of the hip without apparent fracture. In a review of fifty-four dislocations, nine required open reduction after either a failed attempt at closed reduction or a non-concentric reduction. The factors preventing closed reduction included the femoral head buttonholed through the capsule and the piriformis muscle displaced across the acetabulum. A concentric anatomical reduction was prevented because of an inverted lumbus or an osteocartilaginous loose body in the acetabulum. Guidelines for diagnosis and treatment are discussed.
mesh_terms: D000077:Acetabulum / Q000293:injuries / Q000601:surgery; D000293:Adolescent; D000328:Adult; D001174:Arthrodesis / Q000379:methods*; D005260:Female; D005500:Follow-Up Studies; D006617:Hip Dislocation / Q000000981:diagnostic imaging / Q000601:surgery / Q000628:therapy*; D025981:Hip Injuries; D006621:Hip Joint / Q000000981:diagnostic imaging / Q000601:surgery; D006801:Humans; D008297:Male; D009132:Muscles / Q000293:injuries / Q000601:surgery; D014057:Tomography, X-Ray Computed