1. Dental University Hospital, King Saud University Medical City, Riyadh 11545, Saudi Arabia
2. Department of Periodontics and Community Dentistry, College of Dentistry, King Saud University, Riyadh 11545, Saudi Arabia
3. Department of Oral Medicine and Diagnostic Sciences, College of Dentistry, King Saud University, Riyadh 11545, Saudi Arabia
4. Department of Prosthetic Dental Sciences, King Saud University, Riyadh 11545, Saudi Arabia