Document Type : Original Article
Authors
1 Periodontology , oral medicine,oral radiology and diagnosis , Faculty of dentistry ,azhar university (Assiut branch) , Assiut
2 Oral Medicine, Periodontology, Oral Diagnosis and Dental Radiology Department, Faculty of Dentistry, Al-Azhar University (Assiut Branch)
3 Oral Pathology, Faculty of Dentistry, Al-Azhar University (Assiut Branch)
Abstract
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