Tehran University of Medical Sciences Frontiers in Dentistry 2676-296X 7 1 2010 03 15 41 49 A. Pakdaman Assistant Professor, Department of Community Oral Health, Faculty of Dentistry, Tehran University of G. Meighani Assistant Professor, Department of Pediatric Dentistry, School of Dentistry, Tehran University of Me 2015 10 03 Supernumerary tooth is one of the developmental problems in children. Mesiodens is a supernumerary tooth present in the midline between the two central incisors. It usually results in oral problems such as malocclusion, food impaction, poor aesthetics, and cyst formation. The prevalence of mesiodens varies between 0.09% and 2.05% in different studies. This paper reviews current literature on etiology, prevalence, diagnosis, and management of this problem. Accordingly, early diagnosis and treatment is suggested to prevent orthodontic and pathologic complications. https://fid.tums.ac.ir/index.php/fid/article/view/208 https://fid.tums.ac.ir/index.php/fid/article/download/208/208