Fig. 4From: Bilateral dual iliac screws in spinal deformity correction surgeryPhotographs demonstrating the bone model. Dual iliac screws are bound to the S1 pedicle screw with a rod on each side, resulting in three rigid anchors on the right and left sides of the pelvis. The size of iliac screw commonly used is 7.5 mm (width) by 70 mm (length)Back to article page