Document Type : Original Article
Authors
1 Postgraduate student “Master degree” faculty of Dental Medicine, Al-Azhar University.
2 Assiociate professor of Oral Medicine, Periodontology, Oral Diagnosis, and Radiology Department Faculty of Dental Medicine, for girls, Al-Azhar University.
3 Professor of Oral Medicine, Periodontology, oral diagnosis and Radiology. Faculty of Dental Medicine, for girls, Al-Azhar University
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