Dr. Hyun-Duck Nah is the Director of Craniofacial Orthodontics in the Division of Plastic and Reconstructive Surgery and the Director of Craniofacial Research Laboratory at the Children’s Hospital of Philadelphia. She also is a Clinical Associate Professor of Orthodontics in the University of Pennsylvania, teaching residents clinical orthodontics and advising research. She has served in a number of committees including AAO Council on Scientific Affairs, IADR Craniofacial Biology Research Group, and AAOF Planning and Award Review Committee. Dr. Nah’s research areas supported by NIH include craniofacial skeletal biology, molecular developmental biology of TMJ and molecular etiology of cleft lip and palate.