Figure 1From: Tomographic index as auxiliary criteria for surgery indication in fracture dislocation of acetabulum posterior wall In a non fractured acetabulum, four points were defined: P1→ anterior transition between the articular surface and the acetabular fossa. P2 → posterior transition between the articular surface and the acetabular fossa. PW → posterior articular surface edge. CH →femoral head center.Back to article page