[Severe hypodontia in permanent dentition. Orthodontic treatment of oligodontia in children].

[oligodontia]

Our study is aimed to focus on severe hypodontia , the absence of multiple teeth in permanent dentition . Examining the variation of the number of teeth agenesis of permanent teeth is relatively common but real oligodontia is rarely encountered during our daily work . At a number of patients recently attending the Pedodontics and Orthodontics Department of the Dental Faculty of Semmelweis University oligodontia , the absence of at least six or more permanent teeth was found . Examining the aetiology of oligodontia it can be determined that both endogen and exogenous environmental factors may contribute to the cause of the anomaly . In its pathology genetics is considered as the dominant factor what is also proved by familiar inheritance aggregation however it is hard to determine the aetiology in most cases . Severe oligodontia most often is part of certain syndromes . The anomaly causes not only aesthetical and functional problems but also may lead to several complications so early recognition and referral is considered essential . Therapy often involves multidisciplinary approach with individual assessment and planning . We would like to present the possibilities of orthodontic pre-treatment for prosthetic and implant replacement through our cases .