Prevalence and predisponent factors of molar-incisor hypomineralization in primary dentition

Aim: To evaluate the prevalence and predisposing factors for hypomineralization of second molars in children primary dentition. Methods: A questionnaire was applied to parents analyze assist diagnosis between 2 6 years old, followed by an intraoral examination based on indices non-fluorotic enamel defects dentition, according “Modified Index DDE” determine demarcated opacity HSPM presence / severity index assess hypomineralization. Children from public private schools were dived into two groups: if they presented HSPM-Group 1 (G1) did not have HSPM-Control group (CG). Results: The most frequent associated with child Illness first year life (X2= 6.49; p=0.01) antibiotic use 41.82; p= 0.01). mother hypertension 9.36; p=0.01), infections during pregnancy (X2=14.80; alcohol consumption (X2=97.33; p=0.01). There a 3.9% 14 children, statistical difference regarding gender (X2 = 4.57; p <0.05), boys presenting higher frequency. In G1 type opacity, more prevalent characteristics yellowish spot, moderate post-eruptive fracture acceptable atypical restorations. All lesions located labial region 1/3 extension. Conclusion: old 3.9%, predominance males, tooth 65 being affected. association infection life, as well antibiotics sensitivity teeth affected lesion. hypertension, mothers' pregnancy.