Prevalence of Molar Incisor Hypomineralization in over 30,000 Schoolchildren in Switzerland

J Clin Pediatr Dent. 2022 Jan 1;46(1):1-5. doi: 10.17796/1053-4625-46.1.1.


Objectives: To quantify the prevalence of Molar Incisor Hypomineralization (MIH) in the canton of Geneva, Switzerland.

Study design: Thirty-eight dentists of the state school dental services were trained to detect and classify MIH cases. All children (32,142) from age 4 to 12 were examined during the annual dental screening offered by the state. Cases were scored as mild, moderate or severe.

Results: The prevalence of hypomineralizations was found to be 7.45% when all hypomineralized teeth were taken into consideration. MIH cases were found to be at 6.6%. Out of the MIH cases, 51% scored as mild, 36% as moderate and 13% as severe.

Conclusion: The mean prevalence of MIH in Geneva school children was found to be 6.6%. This seems to be lower than the European and the global average. However, with almost half cases being moderate or severe, asserting a proper management protocol is necessary.

Keywords: MIH; Molar incisor hypomineralisation; enamel defects; prevalence.

MeSH terms

  • Child
  • Child, Preschool
  • Dental Enamel Hypoplasia* / epidemiology
  • Humans
  • Incisor
  • Molar*
  • Prevalence
  • Switzerland / epidemiology