Dr. William Proffit is the Kenan Professor of Orthodontics at the University of North Carolina. His textbooks “Contempory Orthodontics” and “Contemporary Treatment of Dentofacial Deformity” qualify him as one of the most widely read orthodontic authors.

Dr. Sarver is an Adjunct Professor at the University of North Carolina. He maintains a private practice in Vestavia Hills, Alabama. Dr. Sarver is the author of, “Esthetics in Orthodontics and Orthognathic Surgery" and is co-author of “Contemporary Treatment of Dentofacial Deformity” with Drs. Proffit and White, and co-author of “Contemporary Orthodontics” with Dr. Proffit and Fields.

Dr. Dirk Wiechmann is a Professor of Lingual Orthodontics at the University of Paris VII and at the Hannover Medical School. He is the inventor of Incognito bracket system of lingual orthodontics. He maintains an outstanding private practice in Bad Essen, Germany. He has authored and presented numerous publications and lectures.

Dr. Bjorn Zachrisson is a Professor in the Department of Orthodontics at the University of Oslo and maintains a private practice emphasizing optimal esthetic outcomes. His inspiring and informative lectures are among the most popular and well attended in orthodontics today.