AUSTIN, Texas--(BUSINESS WIRE)--June 1, 2006--During a controlled launch, the first 15 patients were enrolled in a pioneering cervical artificial disc research study in multiple locations throughout the United States. The Mobi-C cervical disc prosthesis is a second generation, investigational implant designed with innovative mobile bearing technology and a one-step implantation technique. The U.S. IDE study was approved by the FDA this February for both one and two-level implantations.