| Type | General Characteristics | Subtype |
|---|---|---|
| Type A | Fracture involves only one column of the acetabulum | A1: Posterior wall fracture A2: Posterior column fracture A3: Anterior wall and anterior column fracture |
| Type B | Fracture involves both columns, with the acetabular roof remaining connected to the intact ilium | B1: Transverse fracture and transverse with posterior wall fracture B2: T-shaped fracture B3: Anterior wall or anterior column fracture with posterior column semi-transverse fracture |
| Type C | Fracture involves both columns, with the acetabular roof disconnected from the intact ilium | C1: Anterior column fracture line extending to the iliac spine C2: Anterior column fracture line extending to the anterior edge of the ilium C3: Fracture line involving the sacroiliac joint |
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