Abstract
Objective: To verify the prevalence of loss of first permanent molars in children aged 10 to 19 years attending a university clinic. Methods: This is a retrospective cross-sectional study based on data collection of 204 medical records of patients of both sexes, aged 10-19 years. The variables include aspects related to tooth loss, threat and sociodemographic factors. To verify frequencies and associations with variables, Pearson's chi-square test or Fisher's exact test were used, when appropriate. Results: A total of 21.57% loss of first permanent molars was observed, with no difference between sex, place of residence, systemic diseases, frequency of brushing, daily flossing and type of feeding, being the first permanent lower molars the most affected elements, with 9.80% for 36 and 11.27% for 46. The association was positive between tooth loss and age and CPO-D index. Conclusion: The results reveal the high prevalence of loss of first permanent molars, considering the need to develop preventive and curative actions in order to reduce the number of extractions of these elements.