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Epidemiologic Study of Molar-incisor Hypomineralization in Schoolchildren in North-eastern Brazil

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Purpose: To determine the prevalence of molar-incisor hypomineralization (MIH) in children and possible factors associated with this disorder. Methods: This was a cross-sectional observational study of 594 11- to 14-year-olds from Teresina, Piauí, Brazil. The diagnosis of MIH was made based on criteria set by the European Academy of Pediatric Dentistry. To investigate possible associated factors, mothers completed a questionnaire. A descriptive analysis of the data, chi-square, Mann-Whitney, and Fisher tests and Poisson regression (PR) were performed. Results: The prevalence of MIH was 18.4 percent (95 percent confidence interval [CI] equals 15.20 to 21.50). The maxillary molars were the teeth most affected by MIH (36.1 percent). MIH patients showed a higher number of mean DMF-T (PR equals 2.18; 95 percent CI equals 1.46 to 2.85) than those not affected by the condition. There was an association between MIH and preterm birth (PR equals 1.76; 95 percent CI equals 1.22 to 2.12) and between MIH and respiratory distress at birth (PR equals 1.83; 95 percent CI equals 1.25 to 2.18). Conclusions: The prevalence of MIH in schoolchildren was 18.4 percent. Those with MIH had a greater mean DMF-T than those without MIH. Preterm birth and respiratory distress were associated with MIH.
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Keywords: HYPOMINERALIZATION; MOLAR INCISOR; PREVALENCE

Document Type: Research Article

Affiliations: 1: Department of Pathology and Dentistry Clinic, School of Dentistry, Federal University of Piauí, Teresina, Piauí, Brazil. [email protected] 2: Private practice, Teresina, Piauí, Brazil 3: Federal University of Minas Gerais, Belo Horizonte, Minas Gerais, Brazil 4: Department of Pathology and Dentistry Clinic, School of Dentistry, Federal University of Piauí, Teresina, Piauí, Brazil 5: Department of Pathology and Dentistry Clinic, School of Dentistry, Federal University of Piauí, Teresina, Piauí, Brazil

Publication date: November 1, 2015

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  • Pediatric Dentistry is the official publication of the American Academy of Pediatric Dentistry, the American Board of Pediatric Dentistry and the College of Diplomates of the American Board of Pediatric Dentistry. It is published bi-monthly and is internationally recognized as the leading journal in the area of pediatric dentistry. The journal promotes the practice, education and research specifically related to the specialty of pediatric dentistry. This peer-reviewed journal features scientific articles, case reports and abstracts of current pediatric dental research.
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