Figure 2.

Letournel’s classification. A differentiation is established between 5 simple fracture types and 5 combined fracture types. Simple fracture types (A–E) are the fracture of the posterior acetabular rim (A), posterior pillar (B), anterior acetabular rim (C), anterior pillar (D) and the transverse fracture (E). A further distinction can be seen between combined fracture types (F–J): fracture of the posterior pillar and posterior acetabular rim (F), transverse fracture and involvement of the posterior acetabular rim (G), T-fracture (H), anterior pillar with hemivertebral fracture (I) and the two-pillar fracture (J).