Deog-Gyu earned an M.S. (2004) and a Ph.D. (2009) in Conservative Dentistry from Yonsei University. He is currently a professor and chair in the Department of Conservative Dentistry at the School of Dentistry, Seoul National University. His research in conservative dentistry has resulted in 80 publications, 100 presentations, 40 lectures, and 10 awards. His research interests include dental AI, bio-remineralization, dentin hypersensitivity, cracked teeth, zirconia bonding, digital dentistry, wearable diagnostic equipment, and laser disinfection.