1. Department of Prosthetic Dentistry, College of Dentistry, King Khalid University, Abha, Saudi Arabia
2. Division of Endodontics, Khamis Mushait Dental Center (KMDC), Ministry of Health, Aseer, Saudi Arabia
3. Dental Interns, College of Dentistry, King Khalid University, Abha, Saudi Arabia
4. Department of Prosthetic Dental Science, College of dentistry, Jazan University, Jazan, Saudi Arabia