Patent ID: 8398684
Filing Date: 2013-03-19
Classification: A61B

Abstract:
1. A clamp assembly kit for attachment of a spinal rod having a radius R1 to a bone anchoring member, comprising: a first shaft having a threaded first end for insertion into a vertebra and a second end; a head affixed to the second end of said first shaft; a plurality of second shafts each having a different radius R2 from which a selected second shaft is selected and affixed to the head and offset from the longitudinal axis of the first shaft by a distance O where O=R1+R2; and a locking pin including a locking arm and an aperture, said aperture adapted for receiving said selected second shaft; whereby said spinal rod is compressed against said selected second shaft, and whereby the position of said spinal rod is variable relative to said longitudinal axis of said first shaft based on the radius of said selected second shaft.