Most ST’s are detected in anterior region of the maxilla. Mesiodens is the most common type of ST. Their presence can give a lot of clinical problems. Multiple hyperdontia mainly occurs with complex syndromes like cleidocranial dysostosis. The etiology of STs is still not completely understood. They are classified according to their form and location. This study aims to present the epidemiological characteristics of STs in Great Poland based on retrospective study group comprised of the medical records of 88 patients who were treated in the Clinic and Department of Oral Surgery and Periodontology, Poznan University of Medical Sciences from January 2013 to December 2018.

Key words: Hyperdontia, supernumerary teeth, mesiodens.