MagnetOs Flex Matrix Compared to Trinity Elite Mixed With Local Autograft in Patients Undergoing up to Four-level Instrumented Posterolateral Fusion

This is a phase IV post-marketing study for MagnetOs Flex Matrix. MagnetOs Flex Matrix is a synthetic bone graft extender product that is routinely used by surgeons as a treatment for patients with degenerative disc disease and undergoing spinal fusion surgery. In this study, MagnetOs Flex Matrix will be used according to the latest U.S. Instructions For Use, specifically as a bone graft extender mixed with autograft in a 1:1 vol.% in the posterolateral spine. Trinity Elite will also be used according to its latest IFU approved in the US. Specifically, this cellular based allograft is an allograft intended for the treatment of musculoskeletal defects.