Type | Description |
---|---|
Type A: Stable – posterior arch is intact | A1: Fracture does not involve the pelvic ring (avulsion fracture or fracture of the iliac wing) - A1.1: Iliac spine - A1.2: Iliac crest - A1.3: Ischial tuberosity |
A2: Stable or minimally displaced fracture of the pelvic ring - A2.1: Iliac wing fractures - A2.2: Unilateral fracture of anterior arch - A2.3: Bifocal fracture of anterior arch | |
A3: Transverse fracture of the sacrum - A3.1: Sacrococcygeal dislocation - A3.2: Sacrum undisplaced - A3.3: Sacrum displaced | |
Type B: Rotationally unstable, vertically stable – incomplete disruption of the posterior arch | B1: Open book injury (external rotation) - B1.1: Sacroiliac joint, anterior disruption - B1.2: Sacral fracture |
B2: Lateral compression injury (internal rotation) - B2.1: Anterior compression fracture, sacrum - B2.2: Partial sacroiliac joint fracture, subluxation - B2.3: Incomplete posterior iliac fracture | |
B3: Bilateral type B fracture - B3.1: Bilateral open book fracture - B3.2: Open book fracture and lateral compression - B3.3: Bilateral lateral compression | |
Type C: Rotationally and vertically unstable – complete disruption of the posterior arch | C1: Unilateral fracture - C1.1: Fracture of the iliac bone - C1.2: Sacroiliac dislocation and/or fracture dislocation - C1.3: Sacral fracture |
C2: Bilateral fracture with one side type B fracture (rotationally unstable) and one side type C fracture (vertically unstable) | |
C3: Bilateral fracture with both sides type C fracture (both sides completely unstable) |