Document Type : Original Article
Authors
1 Endodontic,dental medicine,al-azhar university,Cairo,Egypt
2 Professor of Endodontic, Endodontic Department, Faculty of Dental Medicine for Girls, Al-Azhar University Cairo Branch.
3 Professor of Endodontic, Endodontic Department, Faculty of Dental Medicine for Girls, Al-Azhar University Asyut Branch.
Abstract
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