Dr. Bahram Ranjkesh, have obtained DDS degree from Tabriz dental school, Iran in 2008. After graduation, He involved in private and state dental practice until 2012, while conducted different research projects mainly in endodontics, which published in peer-reviewed journals. In 2015, he got his PhD from Aarhus University, Denmark. Now, he is holding lectures on dental material biocompatibility, restorative dentistry, and endodontics at Department of Dentistry, Aarhus, Denmark, and have collaboration with NIOM (Nordic Institute of Dental Materials, Oslo, Norway), and carrying on research on dental materials.