Dr. Mohamed Youssef is a Professor of Orthodontics and Dentofacial Orthopedics at the Damascus University, Damascus, Syria, he held his Ph.D. (Dr.med. ) title in the University of Rostock, Department of Orthodontics, Germany in 1988 and the Certificate “ Specialist in Orthodontics (Fachzahnarzt für Kieferorthopädie ) from the German Academe for Postgraduate Study in 1988. He worked as Dean of the Faculties of Dentistry at- the University of Damascus (2007- 2011),-the Syrian Private University (2005-2006), -the Al Hawash Private University (2013- 2015) and- the Wadi International University (2016- 2017) in Syria. He has more than 25 publications as main Author and 36 publications.C o-Author in the Arabic,- English and – German Languages. He has registered two Patents at the World Intellectual Property Organization (WIPO): -the “ CORRECTION OF JAW RELATION BY SKELETAL ANCHORAGE MINIPLATES” in 2012 under number WO2012096633 and – the “INTERMAXILLARY LIP BUMPER” in 2011 under number wo/2011/159261. He Supervised 10 Doctoral Dissertations and 22 Master’s theses. His main interesting research specialty is the facial growth type and its relationship to the malocclusion and to orthodontic treatment.