Hypodontia is one of the most common human dental anomalies. Its management is often complicated. This survey was carried out to study the prevalence, localisation and combination of congenital aplasia in Department of Paediatric Dentistry, Faculty of Dentistry, University of Debrecen. The study group consisted of 669 children, 283 boys and 386 girls, aged 4-18 years. Orthopantomograms and clinical examinations were used for the retrospective study. The prevalence of hypodontia was found to be 7.76 percent, excluding the third molars. Most of the congenitally absent teeth were the upper lateral incisors and the lower second premolars. The most frequent combinations were the 12-22 and the 35-45 ones. We found that our data were very similar to the different international results.