Dr. Stephen J. Chu is an Associate Professor in the Department of Prosthodontics, Director of Esthetic Education at Columbia University School of Dentistry. He also maintains a private practice in fixed prosthodontics in New York City. He has co-authored The Fundamentals of Color: Shade Matching and Communication in Esthetic Dentistry [Chu, S.J., Devigus, A., Mieleszko, A., Quintessence Publishing Co, 2004] and Aesthetic Restorative Dentistry: Principles and Practice [Tarnow, D.P., Chu, S.J., Kim, J.J., Montage Media Corp., 2008]. Dr. Chu is a chapter contributor to The Science and Art of Porcelain Laminate Veneers [Gurel, G., Quintessence Publishing, 2003] and has published 23 articles and given over 100 lectures nationally and internationally on the subjects of aesthetic, restorative, and implant dentistry. Dr. Chu is on the editorial review board of the European Journal of Esthetic Dentistry, IJOMI, Compendium, Journal of Esthetic and Restorative Dentistry. Dr. Chu is the creator of Chu’s Aesthetic Gauges manufactured by Hu-Friedy Co., Inc.