Patent ID: 8267965

Claim:
A spinal stabilization system for a first vertebra and a second vertebra of a human spine, comprising: a dynamic interbody device configured to be positioned between the first vertebra and the second vertebra, the dynamic interbody device comprising: a first surface configured to interface with an end plate of the first vertebra; a keel extending from the first surface and configured to be disposed in the endplate of the first vertebrae, the keel comprising: a neck extending from the first surface of the first member, wherein the neck comprises a proximal portion coupled to the first surface of the first member; and a cylindrical base coupled to a distal portion of the neck, wherein a width of the cylindrical base is larger than a width of a central portion of the neck located between proximal and distal portions of the neck; and a lateral protrusion comprising a tapered shape directed in an anterior direction and positioned at an anterior end of the dynamic interbody device, wherein the lateral protrusion is configured to be engaged by a complementary portion at an anterior end of an adjacent dynamic interbody during insertion of the adjacent dynamic interbody device beside the dynamic interbody device and between the first vertebra and the second vertebra, wherein engagement of the lateral protrusion at least partially blocks longitudinal advancement of the adjacent dynamic interbody device to inhibit over insertion of the adjacent dynamic interbody device and facilitate proper placement of the dynamic interbody devices relative to one another.