Document Type : Original Article
Authors
1 Assistant lecturer of Pedodontic and Oral Health, Misr University for Science and Technology, Cairo, Egypt
2 Professor of Endodontics, Faculty of Dental Medicine for Girls, Al-Azhar University, Cairo, Egypt
3 Assistant Professor of Pedodontics and Oral Health, Faculty of Dental Medicine for Girls, Al-Azhar University, Cairo, Egypt
4 Professor of Medical Applications of LASER- the National Institute of Laser Enhanced Science. Cairo University, Cairo, Egypt
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