• David S Baskin, Patrick Ryan, Volker Sonntag, Richard Westmark, and Marsha A Widmayer.
• Department of Neurosurgery, Baylor College of Medicine, and Veterans Affairs Medical Center, Houston, Texas 77030, USA. dbaskin@tmh.tmc.edu
• Spine. 2003 Jun 15; 28 (12): 1219-24; discussion 1225.

Study DesignA prospective, randomized, pilot clinical trial compared recombinant human bone morphogenetic protein-2 (rhBMP-2) with iliac crest autograft bone for the treatment of human cervical disc disease.ObjectiveTo examine the safety and effectiveness of using INFUSE Bone Graft (rhBMP-2 applied to an absorbable collagen sponge), as compared with an autogenous iliac crest bone graft placed inside the CORNERSTONE-SR fibular allograft, in anterior cervical discectomy and interbody fusion.Summary Of Background DataRecombinant human bone morphogenetic protein-2 is an osteoinductive protein that induces a reliable fusion in the lumbar spine, but it has not been studied in patients with degenerative cervical disc disease.MethodsFor this study, 33 patients with degenerative cervical disc disease were randomly assigned to investigational or control groups. The investigational group received a fibular allograft (CORNERSTONE-SR Allograft Ring) with an rhBMP-2-laden collagen carrier inside the graft along with an ATLANTIS anterior cervical plate. The control group received a fibular allograft with cancellous iliac crest autograft placed inside it, along with an ATLANTIS anterior cervical plate. The patients underwent plain radiographs at 6 weeks, then at 3, 6, 12, and 24 months, and CT scans at 3 and 6 months after surgery. They also completed general health profiles and self-evaluation scales. Adverse events were evaluated for severity, duration, association with the implant, and the need for a second surgical procedure.ResultsAll the patients evaluated had solid fusions 6, 12, and 24 months after surgery. There were no device-related adverse events. At 24 months, the investigational group had mean improvement superior to that of the control group in neck disability and arm pain scores (P < 0.03 each).ConclusionsThis pilot study demonstrates the feasibility of using rhBMP-2 safely and effectively in the cervical spine.

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