[Efficiency of permanent teeth filling in children with molar-incisor hypomineralization]

: to determine by the analysis of literature data whether molar-incisor hypomineralization (MIH) affects the efficiency of dental filling.

The analysis was conducted based on articles found on the PubMed and E-library portals using the keywords: "molar-incisor hypomineralization", "MIH", "rehabilitation in MIH", "enamel pretreatment in MIH", "enamel adhesion in MIH", "treatment of molar-incisor hypomineralization".

Enamel of teeth with MIH differs from healthy enamel: the content of organic matter, including proteins and lipids in hypomineralized enamel is eight times higher than in normal enamel. Increased content of organic matter and phosphorus suggests that the enamel does not reach the maturation stage, and its structure becomes more porous. Many authors indicate a decrease in the adhesion force to demineralized enamel in MIH. To improve it several strategies are used: complete removal of visible demineralized enamel, remineralizing therapy, deproteinization, chemical or mechanical microabrasion of enamel before filling.

The effect of these strategies is inconclusive; in the long term, direct restorations are often complicated by marginal leakage and caries, which in turn leads to the loss of a large amount of hard tissues. Alongside with complete removal of demineralized enamel recommended by some authors this results in an increase of the defect area often corresponding to the indication for tooth restoration by indirect restoration.