Document Type : Original Article
Authors
1 faculty of dentistry?Al-azhar university
2 Head of serum and vaccine research sector
3 Associate Professor of Oral Medicine, Periodontology, Oral Diagnosis and Dental Radiology Department, Faculty of Dental Medicine, Girls branch, Al-Azhar University
4 professor of oral medicine , periodontology, Oral Diagnosis and Dental Radiology
Abstract
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