1. Assistant Professor, Periodontology Department, Shahid Beheshti University of Medical Sciences, Tehran, Iran
2. Associate Professor, Department of Pediatric Dentistry, Dental Research Center, Research Institute of Dental Science, Department of Pediatric Dentistry, Dental School, Shahid Beheshti University of Medical Sciences, Tehran, Iran
3. Dental Research Center, Restorative Department, School of Dentistry, Shahid Beheshti University of Medical Sciences, Tehran, Iran
4. Department of Pediatric Dentistry, School of Dentistry, Arak University of Medical Sciences, Arak, Iran
5. Department of Conservative Dentistry, RWTH Aachen Hospital & Deutsche Gesellschaft fur laserzahnheilkunde (DGL), Aachen Klinkum, Pauwelsstr.30, 52074 Aachen, Germany