41 INTERNATIONAL DENTAL JOURNAL OF STUDENT’S RESEARCH| October 2014 | Volume 2| Issue 3 CASE REPORT Mesiodens- A common supernumerary tooth: Report of management of a case with two mesiodens Dr. ZeeshanSheikh 1,2,3,4 (Dip.Dh, BDS, MSc, PhD, Post-Doctoral Fellow) Dr. Amir Manzoor 5 (BDS,MSc) Dr. Nida Amir 5,6 (BDS, MSc, MSc-Paed-DentResident) 1 Faculty of Dentistry, Division of Biomedical Sciences, McGill University, Montreal. Quebec, Canada 2 Faculty of Dentistry, Matrix Dynamics Group, University of Toronto. Ontario, Canada. 3 Department of Material Sciences & Preclinical Dentistry.Altamash Institute of Dental Medicine (AIDM), Karachi, Pakistan 4 Department of Oral Anatomy.Altamash Institute of Dental Medicine (AIDM), Karachi, Pakistan 5 Faculty of Dentistry, Division of Oral Health and Society, McGill University, Montreal Quebec, Canada 6 Department of Paediatric Dentistry, Nobel Biocare Oral Health Centre, University of British Columbia, Vancouver, British Columbia, Canada Corresponding Author Dr. Zeeshan Sheikh E-mail address: zeeshan.sheikh@mail.mcgill.ca Tel: +1 514 224 7490 Access this Article Online Abstract Supernumerary teeth can be present in both the primary and the permanent dentitions, however, they are almost five times more frequently observed in the permanent dentition. The supernumerary teeth are also reported to be more common in the male, rather than thefemale population. The most commonly occurring supernumerary tooth is the mesiodens, occurring in 0.15% to 1.9% of the population. The exact etiology of supernumerary teeth remains largely unknown. Early diagnosis of mesiodens allows prompt management and prevents the need for extensive treatment and development of associated complications. Spontaneous eruption and alignment of incisors can be potentially initiated by extracting the mesiodens in the early mixed dentition stage. However, if the incisors fail to erupt even after extraction, surgical and orthodontic interventions may be required. Key Words: Tooth; Supernumerary; Incisor abnormalities; Diagnosis. Preamble Hyperdontia is a condition of having supernumerary teeth, whichare defined as extra teeth present in addition to the normal dentition number(1 ). The prevalence of hyperdontia is reported to be between 0.15% and 3.9% (2-7 ). Supernumerary teeth can be present in both the primary and the permanent dentitions, however, they are almost five times more frequently observed in permanent dentition (8-10 ). Also supernumerary teeth are reported to be more common in the male rather than in female population (11 ). The most commonly occurring supernumerary tooth is the mesiodens, which means “middle tooth”(12 , 13 ). A mesiodens is located in the maxillary central incisor region, having an overall prevalence between 0.15% and 1.9%(1 , 8-11 , 14 ). The occurrence of mesiodens may be single, multiple, unilateral or bilateral, and they may often fail to erupt. „Mesiodentes‟ is the name given to the presence of multiple supernumerary teeth in the same dentition (14 ). The presence of mesiodentes has the potential to affect patient appearance and occlusion by the alteration of the natural eruption path of permanent incisors(1 , 15 ,16 ). Incidence Supernumerary teeth mostly occur in the maxilla (~80-90%)(1 , 2 , 17 ), and ~50% of them are found in the anterior region(1 , 15 , 17 ). Around 85% of all anterior supernumerary teeth do not erupt, and Quick Response Code www.idjsr.com Use the QR Code scanner to access this article online in our database Article Code: IDJSR 0114