Fig. 4-I.

Photograph of the medial view of a Sawbones fracture model of a right hemipelvis depicting the reduction of a dislocated anterior column posterior hemitransverse acetabular fracture with the displaced anterior column (1), quadrilateral plate (2), posterior hemitransverse fracture (3), and the stable part (S) of the right hemipelvis. For reduction of the anterior column, the quadrilateral plate, and the posterior column, ball-spike pushers (straight and/or curved) are used with spiked washers attached to the pushers.