A and B, Right hip displays comminuted both-column acetabular fracture with secondary congruence. Left hip has T-shaped fracture with medial dome impaction. C, Three years after open reduction and internal fixation of right T-type fracture, patient developed posttraumatic arthritis that required total hip arthroplasty, while left hip with both-column fracture with secondary congruence treated nonoperatively remained minimally symptomatic.