Fig. 2

Case 15: a 45-year-old male who sustained an unstable AO type C2 pelvic ring fracture in a traffic accident, including a bilateral fracture of the Denis zone II of the sacrum and a 15-mm vertical dislocation (cranial direction). a Preoperative three-dimensional computed tomography (CT), showing the H-shaped sacral fracture. b The 15-mm vertical dislocation (cranial direction) is observable on the preoperative coronal plane CT. c Postoperative radiographs, showing the crab-shaped fixation. d Postoperative CT showing a residual 7.5-mm vertical dislocation (cranial direction)