Document Type : Original Article
Authors
1 Assistant lecturer of Oral Biology, Faculty of Dentistry, Pharos University, Alexandria, Egypt.
2 Professor of Oral Biology, Faculty of Dentistry, Alexandria University, Alexandria.
3 Lecturer of Oral Biology, Faculty of Dentistry, Alexandria University, Alexandria Egypt.
4 Professor of periodontology, Faculty of Dentistry, Alexandria University, Alexandria, Egypt.
Abstract
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