Systematic review and meta-analysis of the prevalence of molar-incisor hypomineralization

Aims: This systematic review and meta-analysis aimed to evaluate the pooled prevalence of molar-incisor hypomineralization (MIH) among children. Methods: Three databases (PubMed, Scopus, and CINAHL) were searched till January 1, 2017, for the prevalence of MIH among children. The heterogeneity of the publications was evaluated using I 2 statistics. Two trained reviewers conducted risk of bias assessment with nine item checklist for prevalence studies. Results: Analysis of the included publications revealed a pooled prevalence of 11.24 (confidence interval = 9.23–13.45) with the use of quality effects model. Heterogeneity among the included publications was high. The risk of bias assessment showed that majority of them were in the low-risk category. Conclusions: MIH is a common problem and one in 10 children could be affected by MIH.