FIGURE 2.
For the iliac screw, the starting point is just slightly medial in the teardrop on the obturator outlet view (A, red circle) and still on the sacral side of the SI joint on the inlet view (B, red arrow). The drill is passed across the SI joint (C) in a trajectory above the sciatic notch (red line over blue outline of sciatic notch) on the iliac oblique view (D).