Document Type : Original Article
Authors
1 B.D.S 2009, Faculty of Dental Medicine, Al-Azhar University (Assuit Branch) Dentist at Students’ Hospital Assiut University
2 Professor and Head, Department of Pedodontics and Dental Public Health Faculty of Dental Medicine, Boys,Cairo Al-Azhar University
3 Ibrahim Farouk Barakat Professor assistant Pedodontics and Oral Health Departement Faculty of Dental Medi-cine, Boys, Cairo, Al-Azhar University
Abstract