[Prevalence of normal occlusion and malocclusion in Bauru (Sao Paulo) students. 1. Sagittal relation].

We have evaluated 2,416 children of both sexes from Bauru, with mixed dentition, at the age between 7 and 11 years, enrolled in 18 public and private schools. In this article we propose to find out the percentage of normal occlusion and the distribution of maloclusions, according to the anteroposterior relationship between the dental archs (following the ANGLE3 classification). The results show a low percentual of normal occlusion, in a total of 11.47% from the studied population. Class I malocclusion was the most prevalent (55%), followed by class II (42%) and, by class III (3%).