SAN CLEMENTE, Calif.--(BUSINESS WIRE)--VertiFlex® Inc., a privately-held medical device company specializing in percutaneous, minimally invasive and motion preservation technologies for treating disorders of the spine, today announced the launch of Silverbolt™ Plus, a posterior fixation system designed to support all types of surgical approaches in the lumbar spine – percutaneous, mini-open, and open in one single instrument set.