Hatem A. Alhadainy, BDS (Egy), MSD (Restorative, Egy), PhD (Endo, Egy-USA), MS (Epidemiology, USA) is a professor and Chairman of Endodontic Department, Faculty of Dentistry, Tanta University. His work was concentrated on Endodontic research with extension in periodontology and Epidemiology. Dr. Alhadainy finished his Bachelor (1982) and Master degrees (1989) from Tanta University, Egypt and PhD degree as a channel program between Tanta University and University of Memphis, USA (1995). He also earned a MS Degree from Colorado State University, USA (2006). He is currently the Chairman of Endodontics Department in Tanta University from Aug. 2013. He was course director of postgraduate courses for several years. Dr. Alhadainy published more than 40 researches in National and International journals and reviewed several articles for international journals. He also presented researches in several international conferences including: Memphis, Chicago, Dallas (USA), Damarcus (Syria), Budapest (Hungary), Florence (Italy) Sanaa (Yemen) and Egypt.