- Displaced Triangular Dome Fractures:
- typical large triangular fragment involving the dome portion of articlar cartilage may be displaced and rotated;
- ORIF is necessary with these fractures;
- High Transverse or T fractures:
- these shearing type injuries involving the superior portion of dome are extremely difficult to reduce by closed means;
- Displaced Double Column Fracture:
- in double column fracture (both column fracture), frx of the ilium occurs in coronal plane and may extend directly into joint;
- CT scan:
- reveals a coronal frx in the dome (compared to the usual to frx in dome parallel to quadrilateral plate, indicating transverse type fracture