The posterior wall fractures involve the rim of the acetabulum, a portion of the retroacetabular surface, and a variable segment of the articular cartilage. The majority of the posterior column remains intact.
A posterior dislocation is associated in approximately 35% of reported cases.
Posterior wall fractures may occur with femoral head fractures.
Posterior wall fractures commonly involve:
Incomplete/nondisplaced transverse or posterior column fracture lines