Prevalência de Hipomineralização Molar-Incisivo e sua Associação com Cárie Dentária em Escolares de Petrópolis, RJ

Abstract

The aim of this study was to assess the prevalence of Molar Incisor Hypomineralization (HMI) and its association with dental caries and sociodemographic variables in schoolchildren of Petropolis, RJ. This cross-seccional study evaluated 450 8-years-old children with all four first permanent molars erupted. The teeth were evaluated for MIH based on the criteria set by European Academy of Paediatric Dentistry. To assess dental caries, DMF-T and def-t índices were used for permanent and deciduous dentition respectively. The examinations were conducted by two calibrated examiners in school environment. The prevalence of MIH was 28,7%. Mild defects were the most prevalent. There was no association between MIH and sociodemographic variables. MIH was significantly more prevalent in boys. The number of affected incisors increases proportionally to the number of affected molars. The def-t index was 3,04 (DP = 2,90) and DMF-T was 0,60 (DP = 1,18). There was a significant association between low family income and dental caries in deciduous dentition. Regarding caries occurrence in permanent dentition, the statistically significant variables were caries experience in deciduous dentition (RC = 4,02; IC: 2,09 – 7,70) and MIH (RC = 1,77; IC: 1,02 - 3,07). The prevalence of MIH was 28,7%. There was no association between MIH and sociodemographic variables. There was more MIH occurrence in boys. The caries index in permanent dentition was higher in children with caries experience in deciduous dentition.