Fig. 1From: Percutaneous, PMMA-augmented, pedicle screw instrumentation of thoracolumbar ankylotic spine fracturesProper positioning of patient 1 on the operating table. The anterior blanket roll serves as the center fulcrum (red arrow) while gravity (blue arrows) closes the fracture. Using two blanket rolls could extend the fracture causing neurological or great-vessel vascular injuryBack to article page