Iranian Journal of Pediatrics
Tehran University of Medical Sciences Press
Vol. 22, No. 2, 2012, pp. 245-251
Bioline Code: pe12043
Full paper language: English
Document type: Research Article
Document available free of charge
Iranian Journal of Pediatrics, Vol. 22, No. 2, 2012, pp. 245-251
© Copyright 2012 - Iranian Journal of Pediatrics
Molar Incisor Hypomineralization: A Study of Prevalence and Etiology in a Group of Iranian Children|
Ahmadi, Rahil; Ramazani, Nahid & Nourinasab, Rahmatollah
Objective: The aim of this study was to investigate the prevalence of molar incisor hypomineralization (MIH)
and its relationship with systemic conditions in a group of Iranian children.
Methods: The study population comprised of 433 7-9 year olds, from four schools in Zahedan, Iran. Subjects
were evaluated clinically by one examiner, and at a separate session, their mothers completed a coded
medical history questionnaire. Hypo-mineralized molars and incisors were recorded based on DDE
(developmental defects of enamel) index and DMFT (number of decayed, filled and missing teeth) was
determined. Statistical analyses were performed using Chi-square and independent sample t-tests.
Findings: Fifty-five (12.7%) children showed MIH. The overall mean number of affected teeth was 0.2. The
mean value of DMFT in MIH children was greater than in normal children. Demarcated opacities were the
most frequent (76%) enamel defect. Mother’s and child’s medical problems during prenatal, perinatal and
post natal period were significantly remarkable in MIH children.
Conclusion: The prevalence of MIH in a group of Iranian children was 12.7%. Prenatal, perinatal and post
natal medical conditions were more prevalent in children affected by MIH.
Developmental Enamel Defects; Molar Incisor Hypomineralization; Hypoplasia
Alternative site location: http://diglib.tums.ac.ir/pub/