Molar Incisor Hypomineralization: A Study of Prevalence and Etiology in a Group of Iranian Children

Rahmatollah Nourinasab; Nahid Ramazani; Rahil  Ahmadi

IJ Pediatrics

The Scientific Journal of Growth & Development Research Center

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Molar Incisor Hypomineralization: A Study of Prevalence and Etiology in a Group of Iranian Children

Author(s):

Rahmatollah Nourinasab¹,

Nahid Ramazani²,

Rahil Ahmadi^3,*

1Zahedan University of Medical Sciences, Zaheadn, Iran

2Pediatric Dentistry Department, Dental School, Zahedan University of Medical Sciences, Zaheadn & Children and Adolescents Health Research Center, Zahedan University of Medical Sciences, Zaheadn, Iran

3Pediatric Dentistry Department, Dental School, Shahed University, Tehran, Iran

IJ Pediatrics:Vol. 22, issue 2; 245-251

Published online:Jun 30, 2012

Article type:Research Article

Received:May 13, 2011

Accepted:Jan 27, 2012

How to Cite:Rahmatollah NourinasabNahid RamazaniRahil AhmadiMolar Incisor Hypomineralization: A Study of Prevalence and Etiology in a Group of Iranian Children.Iran J Pediatr.22(2):245-251.

Abstract

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.

Keywords

Developmental Enamel Defects

Molar Incisor Hypomineralization

Hypoplasia

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