Dr. Won Moon is the former Thomas R. Bales Endowed Chair in Orthodontics at UCLA School of Dentistry, and the founder of the Moon Principles Institute. He completed his dental education at Harvard and orthodontic education at UCLA. His work in multiple areas has been published in various journals, and he is a co-author of four textbooks; these findings have been presented in 37 countries, totaling over 450 presentations. He was responsible for developing Maxillary Skeletal Expander (MSE) in 2004, and he has been active in advocating non-surgical skeletal expansion in both children and adult patients, especially for those who may suffer from airway restrictions. His work in MSE has been widely accepted internationally, and numerous peer-reviewed publications are available.