**5. Classification**

*Essentials in Hip and Ankle*

**14**

**Figure 10.**

*Three-dimensional CT reconstruction of both-column fracture.*

**Figure 9.**

*Orientation of fracture lines on two-dimensional computed tomography as they relate to fracture morphology. (A) Fracture of one or both columns. (B) Transverse fracture. (C) Anterior wall. (D) Posterior wall.*

Classification of acetabular fractures is the key element in understanding the injury and is the first stage of surgical planning [17, 18]. Decisions concerning the choice of approach and the alternative fixation techniques available require full appreciation of the fracture anatomy. There are various classifications for acetabular fractures, out of them Letournel and Judet and AO/OTA classification has been discussed in detail here.
