About the Author:

Julia Harfin is Professor and Chair of the Orthodontic Department at the School of Dentistry, Maimónides University, Buenos Aires, Argentina. Dr. Harfin has served as the president of various organizations: the Argentine Society of Orthodontics (1990-6), ALADO (1999-2008), the Argentine Chapter of the International College of Dentists (1997-2001), the Argentine chapter of the Pierre Fauchard Academy (1992-1993), and the International College of Dentists Section IV (2010-2). Currently, she is the Vice President of the National Academy of Dentists. She was a member of the Executive Committee of the World Federation of Orthodontists from 2000 to 2010. She is an Honorary Member of the Argentine, Chilean, and Polish Orthodontic Societies and in 2010 became a member of the National Academy of Dentistry. Also in 2010 she was named Woman of the Year in Medicine and Healthcare. Dr. Harfin is the author or editor of several previous books, including Achieving Clinical Success in Lingual Orthodontics (Springer, 2014). Dr. Harfin received the 2018 Regional Award of Merit from the World Federation of Orthodontists in recognition of significant contributions to the art and science of orthodontics.

Somchai Satravaha is a Clinical Associate Professor at Mahidol University, Bangkok, Thailand and a Diplomate of the Thai Board of Orthodontics. She received her DDS (Hons) from Chulalongkorn University, Bangkok and later earned the qualification of Zahnärztin für Kieferorthopädie (Orthodontist) from Baden-Württemberg, Germany and the Dr. med. dent. degree (magna cum laude) from Munich, Germany. Dr. Satravaha served as an executive committee member of the World Federation of Orthodontists (WFO) from 2005 to 2015 and is a past president of both the Thai Association of Orthodontists and the Asian Pacific Orthodontic Society. She received a Lifetime Achievement Award from the Thai Association of Orthodontists in 2013 and was a recipient of an Outstanding Alumni Award from Chulalongkorn University Dental Alumni Association in 2014. She obtained later the WFO Regional Award of Merit in 2018 and was recognized an Outstanding Expert in Orthodontics by the Royal College of Dental Surgeons of Thailand in 2019. She is an honorary member of the Association of Philippine Orthodontists, Indian Orthodontic Society, Ho Chi Minh Association of Orthodontists, Bangladesh Orthodontic Society, Orthodontic & Dentofacial Orthopaedic Association of Nepal (ODOAN) and honorary fellow of the Asian Pacific Orthodontic Society. She is currently president of the Advisory Board of the Thai Association of Orthodontists.

Bernd Lapatki received the degree in dentistry from the University of Freiburg, Germany, in 1994. He defended his thesis leading to the Dr. med. dent. degree in 1998, and his Habilitation Thesis on the pathogenesis and treatment stability of cover-bite and Class II Division 2 malocclusion in 2007. He also received a Ph.D. degree in neurophysiology from Radboud University Nijmegen (NL) in 2010 for the electrophysiological characterization of the facial motor system at a motor unit level. His clinical career started in 1995 with practicing as a general dentist for two years before he began his postgraduate study at the Department of Orthodontics, Freiburg University Medical Center. During his clinical work at this department as Specialist in Orthodontics from 2000 to 2009 he was also a Research Fellow at the Department of Clinical Neurophysiology, Radboud University Nijmegen Medical Center, The Netherlands. Since 2009 he is a Full Professor and Head of the Department of Orthodontics at the University of Ulm. From 2013 - 2019 he was the Director of the Centre of Dentistry, and since 2019 he is the Dean of Studies in Dentistry at this University. Bernd Lapatki was awarded in 1999 by the Faculties of Medicine and Applied Sciences of the University of Freiburg for the best dissertation in the field of medicine/medicine technique. In 2004, he received the Alex Motsch Award by the German Society of Dentistry and Oral Medicine, and the Arnold Biber Award (the highest scientific award of Orthodontics in Germany) by the German Orthodontic Society in 2007. The research of this group focuses on the development of methods for clinical force-moment monitoring in orthodontics, numerical simulation and experimental mechanical evaluation of orthodontic treatment approaches including multi-bracket appliances and aligners, and the (patho-)physiology of the facial and masticatory motor systems.