Classification Description Notes
Zone 1 Fracture through sacral ala
Zone 2 Involves one or more formaina Does not impinge upon central canal
Zone 3 Involves primarily the central canal Includes H- or U-type fractures



Denis, F., et al. (1988). “Sacral fractures: an important problem. Retrospective analysis of 236 cases.” Clin Orthop Relat Res 227: 67-81.