Posterior acetabular wall fractures: a technique for screw placement.

Screw placement at the posterior margin of the acetabulum during open reduction and internal fixation of posterior acetabular wall fractures must avoid intraarticular penetration of the hip joint. Analysis of the preoperative computed tomography (CT) scan, operative positioning of the patient in a secure reference plane, and placement of the screws in the coronal plane perpendicular to the long axis of the body will help avoid this surgical complication.