Interbody Systems: Post Market Clinical Follow-up Study

This is a prospective, multi-center study of subjects who will undergo spinal fusion surgery utilizing Stryker Interbody Systems that require post market clinical follow up (PMCF). The primary study hypothesis for each system is that the mean change in NDI (cervical) or ODI (lumbar) from baseline to Month 12 \< -10, that is, the mean improvement exceeds 10 points. In supporting analysis, the same hypotheses will be tested for mean change from baseline to 24 months to demonstrate durability of effectiveness.