SAN CLEMENTE, Calif.--(BUSINESS WIRE)--VertiFlex Inc., a privately-held medical device company specializing in minimally invasive and motion preservation technologies for disorders of the spine, has announced the full commercial introduction of the Silverbolt™ MIS Screw System to the U.S. market. In early 2007, the company received FDA 510K clearance for the system, which will serve as a platform for percutaneous and mini-open fusion procedures.