Patent ID: 7141051
Filing Date: 2006-11-28
Classification: A61B

Abstract:
1. A spinal fixation system comprising: a bone anchor member for being secured to a vertebral bone of the spine and having an enlarged head at one end thereof; an elongate member for extending generally along the spine; a coupling device for securing the elongate member relative to the bone anchor member; a seat of the coupling device having a bore about which the seat extends sized to allow the anchor member to extend through the bore in a plurality of orientations relative to the coupling device with the head engaged against the seat; and a one-piece cam lock member of the coupling device, the one-piece cam lock member having a cam surface thereon which, upon turning of the one-piece cam lock member about a rotary axis while the one-piece cam lock member is fixed against translation in a direction along the rotary axis, cooperates to push the elongate member downward toward the head of the bone anchor member for clamping the head of the anchor member against the seat to fix the coupling device and anchor member relative to each other with the anchor member in one of the orientations thereof and the elongate member secured between the cam lock member and the anchor member head.