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Kee-Joon Lee

Kee-Joon Lee

Yonsei University


Dr. Kee-Joon Lee is a professor of the Department of Orthodontics, Yonsei University College of Dentistry, Seoul, Korea. He is the current dean of the Yonsei University College of Dentistry. He received DDS and PhD degree at the Graduate school, College of Dentistry, Yonsei University. He completed the orthodontics specialty training in Yonsei University Dental Hospital. He was a visiting scholar at the Department of Biochemistry, University of Pennsylvania School of Dental Medicine in 2002-2004 and at the Division of Plastic Surgery, the Children’s Hospital of Philadelphia in 2010-2011. He was an adjunct professor at the Department of Orthodontics, University of Pennsylvania between 2016 and 2019 and at Temple University between 2010 and 2011. He has contributed many book chapters on biomechanics of miniscrew-driven orthodontics, non-extraction treatment in adults, up-to-date lingual orthodontic mechanics and surgery-first approached using TADs. He is the first who demonstrated the miniscrew-assisted rapid palatal expander (MARPE) for adults in AJO-DO, which was cited by many other authors. He has published many articles and case reports regarding the treatment of non-eruption, and total arch movement for hyperdivergent face in orthodontic journals including two cover issues in AJO-DO. His fields in research include clinical biomechanics regarding TADs application and the suture and bone responses to orthodontic stimulus. He has served as a reviewer in major orthodontic journals, including AJO-DO, Angle Orthodontists and European Journal of Orthodontics. He has been invited to many international orthodontic conferences around the world.


Non-surgical facial rebuilding via total arch movement and MARPE


The term “soft tissue paradigm” has been coined decades ago, emphasizing the patient-oriented treatment planning. However, the concept has hardly been translated into clinic possibly due to the limited understanding on the behavior of the facial soft tissue. According to our latest clinical experiences and researches, the miniscrew-type TADs and related appliances such as miniscrew-assisted RPE (MARPE) and torqued wires, have enabled not only individual tooth movement, but also predictable ‘total arch movement’ in three dimension. Combining the known rules-the hard tissue biomechanics and the soft tissue behavior- the next generation orthodontics are now realistic which will benefit both the orthodontists and patients. This course consists of main parts including esthetic orthodontics and therapeutic orthodontics. The first part deals with current concepts on non-surgical treatment on how to change not only the ‘occlusion’ but also the ‘face’ based on the ‘soft tissue paradigm’ from the esthetic standpoint. Applying those rules, answers to common clinical questions such as how to change the face in Class II, III and asymmetry without surgery, how to improve lip protrusion without extraction, will be given. For optimal treatment outcome, in addition to the three-dimensional movement, the fourth dimension (time and growth) will be utilized. The second part will discuss how to restructure the compromised occlusion in terms of transverse control, aiming to the non-extraction treatment. In each part, underlying biomechanical clues for total arch movement and the stability of the treatment will be intensively explained. Specified anatomical and biomechanical considerations can also help the operators achieve successful treatment outcomes with minimal laboratory work. Overall this course conveys practical concepts and techniques that can be taken home and translated into individual practice.

To provide the insights into the clinical meaning of soft tissue paradigm
To provide the insights into the biomechanics of the total arch movement
To provide the insights into the rationale and clinical outcomes of the maxillary expansion in adults


To explain the determinants of the soft tissue changes in the lower face
To explain the possibility of the total arch movement
To explain the possibility of the orthopedic expansion and transverse correction in adults

Learning outcomes:

The participants are able to conduct the clinical maneuver for critical decision making
The participants understand the miniscrew positions for specific total arch intrusion
The participants understand the design of the MARPE and how to activate for maximum success