1. Department of Substitutive Dental Sciences, College of Dentistry Imam Abdulrahman Bin Faisal University Dammam Saudi Arabia
2. Department of Dental Education, College of Dentistry Imam Abdulrahman Bin Faisal University Dammam Saudi Arabia
3. Department of Biophysics, Institute for Research and Medical Consultations Imam Abdulrahman Bin Faisal University Dammam Saudi Arabia