The Synergy Disc To Anterior Cervical Discectomy and Fusion

A multicenter, prospective, non-randomized, historically controlled study. Demonstrate the Synergy Disc is at least as safe and effective as conventional anterior cervical discectomy and fusion (ACDF) to treat cervical degenerative disc disease (DDD) in subjects who are symptomatic at only one level from C3 to C7 that are unresponsive to conservative management. Patients will be evaluated preoperatively, at the time of surgery, and at 6 weeks, 3, 6, 12, and 24 months after surgery. Follow-up will continue annually until the last patient reaches 24-month follow-up. The primary analysis will occur at 24 months.