Document Type : Original Article
Authors
1 Assistant lecturer in Operative Dentistry Department, Faculty of Dentistry, Beni Suef University, Egypt.
2 Professor of Operative Dentistry, Faculty of Dental Medicine for Girls, Al-Azhar University, Cairo, Egypt
3 Associate Professor of Operative Dentistry, head of Operative Dentistry department, Faculty of Dentistry, Beni-Suef University, Egypt.
4 Associate professor of Operative Dentistry, Faculty of Dentistry, Sinai University kantara branch, Egypt.
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