Document Type : Original Article
Authors
1 Periodontology , Faculty of dentistry, Alexandria university, egypt
2 periodontology , Faculty of dentistry , Alexandria university , egypt
3 Professor, Department of Oral Biology, Faculty of Dentistry, Alexandria University, Egypt
4 Lecturer of periodontology, Department of Oral Medicine, Periodontology, Oral Diagnosis and Radiology, Faculty of Dentistry, Alexandria University
Abstract
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