Document Type : Original Article
Authors
1 Oral Medicine, Periodontology, Oral Radiology, and oral diagnosis. Faculty of Dentistry. Al-Azhar University. Cairo. Egypt
2 Department of Oral Medicine,Periodontology,Oral Diagnosis and Oral Radiology.Faculty of Dental Medicine.Al-Azhar University.Boys.Cairo
3 Department of Oral Medicine,Periodontology,Oral Diagnosis and Oral Radiology.Faculty of Dental Medicine.Al-Azhar University.Boys.Cairo    
Abstract
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