1. Department of Oral Medicine and Diagnostic Science; Al-Farabi Colleges; Riyadh Saudi Arabia
2. Department of Prosthodontics; Ahram Canadian University; Cairo Egypt
3. Department of Restorative Dental Sciences; Al-Farabi Colleges; Riyadh Saudi Arabia
4. Primary Health Care Corporation; Doha Qatar
5. Department of Maxillofacial Surgery and Diagnostic Sciences; College of Dentistry; Jazan University; Jazan Saudi Arabia