Document Type : Original Article
Authors
1 Assistant Lecturer of Operative Dentistry, Faculty of Dental Medicine for Girls, Al-Azhar University
2 Professor of Operative Dentistry, Faculty of Dental Medicine for Girls, Al-Azhar University, Cairo, Egypt
3 Assistant Professor and Head of Operative Dentistry Department, Faculty of Dental Medicine for Girls, AL-Azhar University, Cairo, Egypt
4 Assistant professor of Medical microbiology and immunology, Faculty of Medicine for Girl, Al-Azhar University, Cairo, Egypt
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