Prevalence and severity of molar incisor hypomineralization in children aged 11-16 years of a city in Karnataka, Davangere

J Indian Soc Pedod Prev Dent. 2015 Jul-Sep;33(3):213-7. doi: 10.4103/0970-4388.160366.


Introduction: Molar incisor hypomineralization (MIH) describes the clinical picture of hypomineralization of systemic origin affecting one or more first permanent molar. There is a rarity of prevalence studies in Indian population.

Objectives: The main aim of this study was to investigate the prevalence of MIH in a population of South Indian children.

Settings and design: A cross-sectional epidemiological survey, included 2000 children aged 11-16 years chosen by stratified random sampling from government and private schools of Davangere, a city in South India.

Materials and methods: Evaluation of MIH and decayed, missing and filled teeth was carried out in these children by a calibrated examiner. The severity of hypomineralization was recorded according to the Wetzel and Reckel scale.

Statistical analysis: Chi-square test was used to analyze the categorical data. P ≤ 0.05 was considered for statistical significance.

Results: About 8.9% of all examined children showed at least one ill-structured first permanent molar in terms of MIH. The male and female ratio was found to be 1:1.1. The decreasing order of occurrence of MIH affected teeth were permanent maxillary molars, maxillaryincisors, mandibular molars and the mandibular incisors.

Conclusion: The prevalence of MIH in the permanent dentition of south Indian children was 8.9%. There is a need for a proper planned preventive and restorative program with regard to the increasing prevalence of MIH.

MeSH terms

  • Adolescent
  • Child
  • Cities / epidemiology
  • Cross-Sectional Studies
  • Dental Enamel Hypoplasia / epidemiology*
  • Dental Enamel Hypoplasia / pathology
  • Dentition, Permanent
  • Female
  • Humans
  • Incisor / pathology
  • India / epidemiology
  • Male
  • Molar / pathology
  • Prevalence
  • Severity of Illness Index