US Patent 8100828 Distraction and retraction system for spinal surgery

The surgical instrumentation system is adapted to provide an operative approach to the spinal column and maintain distraction of adjacent vertebrae. The system includes at least one retractor and a pair of opposite distractor mechanisms mounted to a frame. The distractor mechanisms each include an adjustment mechanism permitting the distractor mechanism to be pivoted relative to the vertebra and secured to the frame after being repositioned.