Document Type : Original Article
Authors
1 Assistant Lecturer of Oral and Dental Biology, Faculty of dentistry, Benghazi University, Benghazi, Libya
2 Professor of Oral and Dental Biology, Former Dean of the Faculty of Dental Medicine for Girls, Al-Azhar University, Cairo, Egypt
3 Professor and head of Oral and Dental Biology, Faculty of Dental Medicine, Al-Azhar University, Cairo, Egypt
Abstract
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