Unstable fracture loss of 50% of vertebral body height; angulation of thoracolumbar junction > 20 multiple adjacent compression frx; failure of 2/3 of columns of spine ALL SPINAL INJURIES ARE UNSTABLE UNTIL PROVED OTHERWISE
L 2 compression burst fracture : posterior fusion with pedicle screws ( yellow arrow ) joined by a posterior bar ( white arrow ). The pedicle screws should be entirely within the bone of the body and pedicle of the vertebral bodies.
L 2 burst fracture. Pedicle screws have been placed in the L1, L2, and L3 (yellow arrows) vertebral bodies.