Abstract: Intervertebral prosthetic systems, devices, and associated methods are provided. The present disclosure provides intervertebral prosthetic devices that include lateral plates to engage the lateral walls of the vertebral bodies for stability and include a compliant central component, fusion-cage central component, or any other suitable type of motion-preserving or fusion component positioned between the lateral plates. In some instances, the lateral plates and the central component are connected by an elongated member that extends across the disc space. The designs of the present disclosure allow insertion through a unilateral approach yet still have engagement on both sides of the vertebral body to provide stability and reduce the risk of subsidence.

Abstract: An intervertebral implant adapter for the L5-S1 juncture comprises a wedge shaped body of biocompatible material having upper and lower surfaces with the upper surface having a slot which provides slidable interlocking engagement with a motion or fusion implant. The lower surface is provided with any convenient bone anchoring mechanism. The adapter mates with an upper implant which is implanted after the adapter so as to provide an implant which matches the lordotic angle but which, in its multiple piece form, is no bigger than the posterior disk height.