The aim of this investigation was to determinate the frequency malocclusion the students II Class primary school from Knjazevac. There were analyzed 195 students both sexes of the II Class primary schools from Knjazevac. The results have shown that there has been increase of different orthodontics anomalies. 32 persons only were without orthodontics anomalies. There are 42,56% persons with Class I malocclusion; 34,36% with Class II/1; 31,79% Class II/2 and 2,56% with Class III malocclusion. 44,10% of persons have crowding in the upper jaw; 30,25% have crowding in the lower jaw; 6,15% have protrusion of upper frontal teeth; 2,56% persons have open bite; 27,17% persons have deep bite. .
