Document Type : Original Article
Authors
1 endodontic department, faculty of dentistry, al azhar university, Cairo,egypt
2 department of endodontics, faculty of dentistry, Al Azhar University,Cairo Egypt
3 Department of oral biology, Faculty of Dentistry, Al-Azhar University, Cairo,egypt
4 Department of Endodontics, Faculty of Dentistry, Al-Azhar University, Cairo,egypt
Abstract
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