Patent ID: 8246665
Filing Date: 2012-08-21
Classification: A61B

Abstract:
1. A cross connector head assembly for use with a spinal rod bone screw assembly, the cross connector head assembly comprising: a first portion configured as a combination collar for fixing an orientation of a spinal rod bone screw head to a bone screw of the spinal rod bone screw assembly and cross connector head for the spinal rod bone screw assembly, the cross connector head joined to the collar at a first minimum cross section area whereby application of a first torque limit separates the cross connector head from the collar; a second portion configured as a combination set screw for fixing a spinal rod within the spinal rod bone screw assembly, retention pivot for pivotally retaining the cross connector head relative to the collar, and driver section for installing the second portion, the driver section joined to the retention pivot at a second minimum cross section area whereby application of a second torque limit separates the driver section from the retention pivot; and a driver portion configured for releasable coupling with the first and second portions and provide application of the first and second torque limits whereby the first and second portions are installed onto the spinal rod bone screw assembly.