Document Type : Original Article
Authors
1 Assistant Lecturer of Endodontics, Faculty of Dental Medicine, Al-Azhar University (Assuit Branch), Egypt.
2 Endodontic department, faculty of dental medicine, Al azhar university girls branch, Cairo ,Egypt
3 Professor and Head of Endodontic Department, Faculty of Dental Medicine Al-Azhar University (Assuit Branch)
Abstract
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