Document Type : Original articles
Authors
1 Orthodontic department, faculty of dentistry, Ain Shams university, Cairo, Egypt.
2 Orthodontic department, Ain Shams University, Cairo, Egypt.
3 Professor of Fixed Prosthodontics, Ain Shams Univ, Egypt
4 Orthodontic Department, Faculty of Dentistry, Ain Shams University
Abstract
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