NEW YORK & LAS VEGAS--(BUSINESS WIRE)--Just days after Centinel Spine’s new STALIF MIDLINE™ Integrated Interbody Fusion™ system was unveiled at the annual meeting of the North American Spine Society (NASS), the first MIDLINE device has been successfully implanted by noted Orthopaedic Surgeon, John S. Thalgott, MD at Valley Hospital in Las Vegas, NV.