A spinal fixation system includes a plurality of anchor screw assemblies, e.g. including anchor screws and clamp assemblies defining rod passages therethrough. A rod is receivable in the rod passages between the anchor screw assemblies, and a spacer is securable on the rod. During use, a first anchor...http://www.google.es/patents/US6770075?utm_source=gb-gplus-sharePatente US6770075 - Spinal fixation apparatus with enhanced axial support and methods for use
Spinal fixation apparatus with enhanced axial support and methods for use
