Table 1.

AO/OTA classification of pelvic ring injuries according to Tile’s recommendation [24, 34]

Type A: Stable pelvic ring

A1: Avulsion of the innominate bone

A2: Stable iliac wing fracture or stable minimally displaced ring fractures

A3: Transverse fractures of the sacrum and coccyx below the SI-joint level

Type B: Partially stable pelvic ring

B1: Open-book injury

B2: Lateral compression injury

B2.1: Ipsilateral type

B2.2: Contralateral type (bucket handle)

B3: Bilateral B injuries

Type C: Complete unstable pelvic ring

C1: Unilateral

C1.1: Ilium

C1.2: Sacroiliac dislocation or fracture dislocation

C1.3: Sacrum

C2: Bilateral, one side B, one side C

C3: Bilateral C lesions