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.

In this study, following a screening period of a maximum of 30 days, 100 patients will undergo up to four-level instrumented posterolateral fusion (PLF) procedure. Prior to surgery, each patient will be randomized to receive MagnetOs Flex Matrix on the assigned side of the spine and Trinity Elite on the other at the diseased levels. They will be followed up at discharge, Week 2, Week 6, Month 3, Month 6, and Month 12. The primary endpoint will be analyzed at Month 12. In this study, MagnetOs Flex Matrix will be applied according to the latest Instructions for Use approved in the United States. Specifically, MagnetOs Flex Matrix will be used as a bone graft extender mixed with autograft in a 1:1 vol% in patients with leg pain, and/or back pain requiring up to four-level instrumented posterolateral spine fusion procedure. The fusion procedure (PLF) will be left to the surgeon's discretion. Radiographs will be obtained at Screening, Week 2, Week 6, Month 3, Month 6 and Month 12. CT-scans will only be obtained at Month 6 and Month 12.