Authors
1 BDS 2006 AL-Merquib University, Administrator in Orthodontic Department, Faculty of Dental Medicine Al-Merquib University-Zliten-Libya.
2 Professor of orthodontic, Head of orthodontic department –faculty of dental medicine for girls- Al-Azhar University.
3 Associate Professor, Orthodontic Department, Faculty of Dental Medicine For Girls Al-zhar University
4 Associate Professor of Oral Medicine, Periodontology-Oral Diagnosis and Radiology, Faculty of Dental Medicine for Girls Al-Azhar University.
Abstract
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