Dr. Hans Paulsen works with the Department of Orthodontics, Municipal Dental Health Service of Denmark. He has been a visiting professor at the Karolinska Institute in Stockholm, an associate professor in orthodontics at the Royal Dental College in Arhus, Denmark, and a visiting professor at the University of Illinois Department of Orthodontics in Chicago, Illinois. He received a certificate in dentistry from the Royal Dental College of Copenhagen, a certificate in orthodontics from Copenhagen University, and Odont Dr degree from the Karolinska Institute in Stockholm. His research interests include tooth autotransplantation, changes of deciduous molars, TMJ bone remodeling in response to Herbst treatment. He and his colleagues have published numerous articles about tooth autotransplantation.