Document Type : Original Article
Authors
1 Operative Dentistry Department, Faculty of Dentistry, Nahda University
2 Professor of Operative Dentistry and Vice-Dean of Postgraduate Studies, Faculty of Dental Medicine, Al–Azhar University (Boys – Cairo)
3 Professor of Endodontics, Faculty of Dental Medicine, Al–Azhar University (Boys – Cairo)
4 Professor and Head of Oral and Dental Pathology Department, Faculty of Dental Medicine, Al–Azhar University (Girls – Cairo)
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