Patent ID: 7678136
Filing Date: 2010-03-16
Classification: A61B,F16B

Abstract:
1. A spinal fixation assembly comprising: a connector including a rod coupler and an extension plate that projects outwardly from the rod coupler, the extension plate defining a through-hole; a collar positioned at an underside of the extension plate; a bone screw including a head defining a socket, the head of the bone screw being mounted at least partially within an underside of the collar; a fastener including a head that mounts within the socket of the bone screw, and a shank that extends through the collar and the through-hole of the extension plate; a split ring that mounts on the threaded shank; and a compression ring that is linearly forced over the exterior of the split ring to compress the split ring relative to the shank; wherein the shank is externally threaded and the split ring is internally threaded.