Dr. Chris Chang received his PhD in bone physiology and Certificate in Orthodontics from Indiana University in 1996 and is a Diplomate of American Board of Orthodontics (ABO). He is the author of Jobsology, co-author of Orthodontics Vol I-IV, Clinical Implant Dentistry I-II, and publisher of International Journal of Orthodontics and Implantology (iJOI). Dr. Chang frequently lectures worldwide on non-surgical orthodontic treatment, implant-orthodontic combined treatment and effective presentations. As a private instructor since 2006, he has taught over 2,500 doctors from more than 30 countries. In addition to teaching and publishing, he also founded Newton's A, Inc. and Beethoven Orthodontic Group, based in Hsinchu, Taiwan. His passion in digital learning has led him to produce a series of video courses on orthodontics and implantology and an App (iOS), Beethoven Dental Encyclopedia (BDE). He has been actively involved in the design of orthodontic bone screws and application on impaction treatment. His latest focus is implant and orthodontic combined treatment.