Document Type : Original Article
Authors
1 Department of Oral Medicine, Periodontology, Oral Diagnosis and Dental Radiology Faculty of Dental Medicine Al-Azhar University Assiut
2 Department of Oral and Maxillofacial surgery, Faculty of dentistry, (Assiut, boys), AlAzhar University, Egypt
3 Department of Oral medicine, Periodontology, Diagnosis and Oral radiology, Faculty of Dental Medicine, (Assiut, boys), Al-Azhar University, Egyp
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