Dental crowding can be defined as a lack of space in dental arch for the proper placement of all teeth. The aim of this study was to determine prevalence of maxillary and mandibular anterior crowding at school children from Niš and surroundings. Material and methods: The study sample comprised 2027 elementary school children (1025girls, 1002 boys). We have analyzed the presence and extent of maxillary and mandibular anterior crowding (mild, moderate and severe ). Results: The percentage of maxillary anterior crowding for girls (73,55%) was greater than that for boys (65,65%). The most common was a mild crowding (37,58% girls, 42,35% boys), then moderate crowding (35,28% girls, 35,22% boys) and the lowest percentage had severe crowding (27,14% girls, 22,43% boys).The percentage of mandibular anterior crowding for girls (78,54%) was greater than that for boys (76,55%). The most common was a mild crowding (40,37% girls, 39,95% boys), then moderate crowding (33,78% girls, 36,25% boys) and the lowest percentage had severe crowding (25,84% girls, 23,85% boys). Conclusion: It is important to have knowledge about the incidence of dental crowding in school children, that we can start with treatment on time.
