Hipomineralização Molar-Incisivo: avaliação da ocorrência de fratura pós-eruptiva e da retenção de selante de fóssulas e fissuras

Abstract

This thesis comprises two studies. The first, a systematic review, aimed to answer the question: “In hypomineralized teeth (P), yellow-brown (E) opacities are more prone to post-eruptive enamel breakdown (PEB) (O) compared to creamy-white opacities (Ç)?". MedLine, LILACS, BBO, Cochrane Library, Web of Science, Scopus, Embase, Google Scholar and OpenGrey databases were explored. Study selection, data extraction, and risk of bias assessment using the Newcastle-Ottawa Scale (NOS) tool were performed independently and in duplicate. The certainty of the evidence was evaluated according to GRADE. Of 814 retrieved records, 8 were included. The prevalence of PEB was more frequent in yellow-brown opacities. results suggest that the color of opacities in hypomineralized teeth can change the risk of occurrence of PEB. However the evidence is heterogeneous and the certainty of evidence very low. The second, a randomized controlled clinical trial, aimed to evaluate the retention of pit and fissure sealant in first permanents molars (FPM) with HMI. Patients were randomly allocated into two groups: glass-coated sealant (Equia Forte® – GC, Europe) and resin sealant (FluroShield® – Dentisply Sirona, Brazil). The sample consisted of 42 children with a mean age of 8.48 years (±0.55), 20 girls and 22 boys. The survival rate of sealants was 0.81 and 0.89 after 6 months and 0.72 and 0.83 after 12 months for the RES and GIC groups, respectively. In the bivariate analysis, there was no influence of tooth type, opacity color or caries score. GIC and RES sealants on HMI molars showed a similar retention rate after 12 months. (p value >0.05, Pearson's chi-square test).