Dr. Eric Liou is an associate professor and the chairman of the Faculty of Dentistry, Chang Gung Memorial Hospital & Chang Gung University, Taipei, Taiwan. He is also a visiting professor in the Department of Orthodontics, Showa University, Tokyo, Japan. For the profession affiliations, Dr. Liou is currently immediate past president of the Taiwan association of Orthodontists, and immediate past president of the World Implant Orthodontic Association. He also is the ECM of Asian Pacific Orthodontic Society (APOS) and the editor of the APOS Trends in Orthodontics. His main research interests are distraction osteogenesis, TADs, orthodontic tooth movement, platelet rich plasma, and bone physiology. Dr. Liou has numerous publications and presentations, specially on the topics of accelerated orthodontic tooth movement, maxillary orthopedic protraction, surgery first accelerated orthognathic surgery, and TADs.

Title of Talk

TADs in treatment of Class III malocclusion


TADs have been using in the treatment of Class III malocclusion successfully for distalizing lower dentition with or without extraction for the correction of anterior cross bite. However, the distalization of lower dentition also moves lower lip back, which relatively in turn might worsen the chin prominence and chin throat length, especially in adult patients. It is therefore the improvement of facial profile and decrease of chin prominence and chin throat length should be included in the treatment goals of Class III malocclusion. A new treatment strategy therefore has been developed for improving occlusion first by distalizing lower dentition with TADs or extraction to correct anterior cross bite, and second for improving facial profile and decreasing chin prominence and chin throat length with TADs in the upper. This presentation will illustrate this new treatment strategy in details.