Graduate of The School of Dentistry, Seoul National University, Seoul, Korea (1998); Finished residency for orthodontics in the Department of Orthodontics, Dental Hospital, Seoul National University (2001); PhD at Graduate School of Medical and Dental Science, Tokyo Medical and Dental University, Tokyo, Japan (2006); 2008-present, Associate Professor, Department of Orthodontics, Seoul St. Mary’s Hospital, Medical College, The Catholic University of Korea, Seoul, Korea