**6.5. Transverse fracture**

fracture (**Figure 3**). There is one exception in each group. The transverse fracture in the simple group involves both columns and the anterior column with posterior hemitransverse fracture

**Figure 3.** Associated fractures. (A) Posterior wall with posterior column fracture (B) Transverse with posterior wall fracture (C) T shaped fracture.(D) Anterior column with posterior hemitransverse fracture.(E) Bicolumn fracture.

This is the most common type of acetabular fracture. It involves disruption of the posterior wall which can be single or multifragmentary. There can be marginal impaction or acetabular depression fracture commonly associated with the posterior dislocation of the hip joint and radiologically identifiable disruption of the posterior wall with break in the sagittal plane of CT scan.

Characterized by disruption of the ischial portion of the pelvis and fracture line usually extends through the sciatic buttress. The fracture line usually extends from obturator foramen to greater sciatic notch through weight bearing dome of the acetabulum. The iliac oblique view shows

involves only one column in complex group [24].

**6. Simple fractures**

46 Trauma Surgery

**6.1. Posterior wall fracture**

**6.2. Posterior column fracture**

This fracture separates acetabulum into two segments transversely. It involves both columns with intact obturator foramen. This fracture is subdivided into three types according to the level of fracture, namely infratectal, juxtatectal and supratectal [11] (**Figure 4**). Radiographically, both iliopectineal and ilioischial lines will be disrupted. In CT scan, it is characterized by sagittal-oriented fracture line extending through both columns.

**Figure 4.** Types of transverse fractures. (A) Supratectal fracture (B) Transtectal fracture (C) Infratectal fracture.
