Document Type : Original Article
Authors
1 Dentist at Egyptian Ministry of Health, Egypt.
2 Professor of Orthodontic, Faculty of Dental Medicine for Girls, Al-Azhar University, Cairo, Egypt
3 Professor and Head of Orthodontic Department, Faculty of Dental Medicine for Girls, Al-Azhar University, Cairo, Egypt.
4 Lecturer of Orthodontics, Faculty of Dental Medicine for Girls, Al- Azhar University, Cairo, Egypt.
Abstract
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