Institution: | 1. Department of Prosthetic Dental Sciences, College of Dentistry, King Saud University, Riyadh, Saudi Arabia;2. Department of Preventive Dental Sciences, Prince Sattam Bin Abdulaziz University, Alkharj, Saudi Arabia;3. Department of Periodontics and Community Dentistry, College of Dentistry, King Saud University, Riyadh, Saudi Arabia |