1. Wael M Al-Omari, BDS, MDSc, PhD, assistant professor, Department of Restorative Dentistry, Faculty of Dentistry, Jordan University of Science and Technology, Irbid, Jordan
2. *Qasem D Al-Omari, BDS, MS, FDSRCSI, assistant professor, Department of Restorative Sciences, Faculty of Dentistry, Kuwait University, Safat, Kuwait
3. Ridwaan Omar, BSc, BDS, LDSRCS, MSc, FRACDS, FDSRCSEd, professor, Department of Restorative Sciences, Faculty of Dentistry, Kuwait University, Safat, Kuwait