1. Department of Oral and Maxillofacial Prosthodontics, Faculty of Dentistry King Abdulaziz University Jeddah Saudi Arabia
2. Department of Operative Dentistry, Faculty of Dentistry King Abdulaziz University Jeddah Saudi Arabia
3. Department of Dental Public Health, Faculty of Dentistry King Abdulaziz University Jeddah Saudi Arabia
4. Yanbu General Hospital Yanbu Saudi Arabia