Dr Won Moon

Dr Won Moon

Dr Won Moon


Listen to Dr Won Moon at the 2024 ASLO Congress.

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The New Age of Orthodontics Using AI and Digital Technologies: Overcoming the Limitations, and Charting the Unknown Territories with MSE, New Generation of Aligner Systems and Novel Lingual Appliances


The discipline of orthodontics is going through drastic changes with the advent of new concepts and technologies. Among these, the non-surgical maxillary expansion in mature patients and clear aligner treatment have taken the center stages of the clinical interests. Although numerous research data and successful clinical cases were presented in recent years, there are many unanswered questions, shortcomings, and challenges we must overcome as we learn to adapt these novel treatment concepts. The shortcomings associated with the maxillary expansion and the current aligner systems will be discussed in detail, and potential solutions by the use of bone-borne expander and novel aligner systems will be proposed. The Maxillary Skeletal Expander (MSE) has evolved since 2004, and overcoming its shortcomings will be illustrated through a trouble shooting exercise. Despite the continuous improvements with various aligner systems, there exist many limitations of their applications. A novel aligner concepts designed to overcome these shortcomings will be introduced, and combining these two devices for optimal treatments of difficult cases will be discussed.


Furthermore, many other novel products have been introduced in the market place, with claims of certain advantages over the existing systems. As these new innovations flood the orthodontic world, the obvious question becomes the relevance of the existing system, including the lingual appliances. The world of orthodontics is evolving at a furious speed, and it is easy to lose sight of the fundamental concepts of orthodontic biomechanics. This presentation will shed some light into incorporating the common-sense biomechanics and fundamental principles of orthodontics as we embrace the changes. 


Learning Objectives: 

  • Overall concept of MSE; differentiating craniofacial and dentoalveolar changes 
  • Proper use, fabrication, protocols, and management of MSE cases based on mechanical and biological considerations
  • Shortcomings with current aligner systems
  • Novel concepts and future directions (Aligner vs Lingual System vs Labial System)


Won Moon, DMD, MS

Professor, Department of Orthodontics, Ajou University School of Medicine

Adjunct Professor, The Forsyth Institute

Adjunct Professor, Kyung Hee University

Former Thomas R. Bales Endowed Chair in Orthodontics, UCLA (2013-2020)

Founder, the Moon Principles International Research Institute 

Co-Founder, BioTech Innovations

Diplomate of the American Board of Orthodontics, since 2002



Dr. Won Moon is the Founder/CEO of the Moon Principles Institute (“the MoonLab”) and a Co-founder/Chief Innovations Officer of BioTech Innovations. He served as the Thomas R. Bales Endowed Chair in Orthodontics for the orthodontic residency program at UCLA School of Dentistry (2013-2020), and he currently holds three academic positions: Full-Professorship at Ajou University School of Medicine, and Adjunct Professorship at the Forsyth Institute and Kyung Hee University. He has been a Diplomate of the American Board of Orthodontics since 2002. 


He completed his dental education at Harvard and orthodontic education at UCLA. He studied mathematics prior to dentistry. His work has been published in various journals, not necessarily limited to orthodontics because of his physical science background, and he is a co-author of seven textbooks, including the Graber’s 7th Edition. He has presented these findings in over 55 countries, totaling over 600 presentations. He received multiple research grants during his tenure at UCLA, including the Groundbreaking Research Project Grant Award in 2014. Besides the numerous research and presentation awards over the years, he has received the “Faculty of the Year Award” multiple times, and he was the recipient of the “Lifetime Achievement and Faculty Dedication/Excellence Award” in 2019 and the “Best Mentor Award” in 2022. His current focus has been establishing protocols for orthopedic corrections with MI, improving the airway for patients with nasal obstruction, creating virtual patients utilizing image analysis and FEM, and developing a novel Aligner System.


His interest in mid-facial expansion began in 2004 as micro-implant became available in the USA, and he is responsible for developing Maxillary Skeletal Expander (MSE), a unique micro-implant assisted rapid palatal expander (MARPE). 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 presentation in MSE has been widely accepted internationally, and numerous peer-reviewed publications are available.



His interest in aligner systems began in 2010 as the aligner systems became popular, but they had countless shortcomings and could not achieve optimal orthodontic results. He has won the Center Award Grant from the American Association of Orthodontic Foundation (AAOF) in 2018 as a Co-PI of the research project, “Standard Characterization of Clear Orthodontic Aligner”, and the goal of the project was to develop protocols that can be used to evaluate the mechanical properties of clear aligners. He was also invited as a keynote speaker for the Congress of the Spanish Society of Aligners (SEDA) and National Congress of Italian Aligner Society (SIALIGN) in 2021. He is currently involved in multiple aligner research projects in collaboration with national and international colleagues.