Pedicle screws are secured in two columns, one along each side of the spine. Cross support rods have ends connected to pedicle screw heads. A longitudinally extending rod is supported on the cross supports and recessed in the cavity created by removal of portions of spinous processes, providing a reduced...http://www.google.fr/patents/US7473269?utm_source=gb-gplus-shareBrevet US7473269 - Spinal fixation system and related methods
