1. From the Department of Periodontics, Faculty of Dentistry, King Abdulaziz University, Jeddah, Saudi Arabia
2. From the Department of Periodontics, King Khalid University, Abha, Saudi Arabia
3. From the Dental Department, Prince Sultan Armed Forces Hospital, Al Madinah Al-Munawwarah, Saudi Arabia
4. From the Department of Orthodontics, Faculty of Dentistry, King Abdulaziz University, Jeddah, Saudi Arabia