Oral health-related quality of life in Egyptian children with Molar Incisor Hypomineralisation. An observational study

The aim of this study was to study the effect of Molar Incisor Hypomineralisation (MIH) on Oral Health-Related Quality of Life (OHRQoL) in children at the mixed dentition stage and correlate it with their caries experience.

One hundred two children aged from 8 to 10 years were recruited, 51 with MIH and 51 as control. Caries experience was recorded using DMFT/deft and ICDAS II. MIH-TNI index was used for classifying MIH severity. CPQ_8–10 with its Arabic version was used to evaluate OHRQoL. Mann–Whitney U test and Kruskal–Wallis test were used for comparisons (p ≤ 0.05).

The mean value for CPQ_8–10 in MIH group was 24.67 (±11.84; median 23; range 6–55) in comparison to 21.04 (±12.3; median 18; range 2–54) for the control group, with no significant difference between groups (p = 0.109). A significantly higher value (p = 0.011) was recorded in patients with MIH-TNI 4 mean 32.16 (±13.9; median 35; range from 7 to 55) in comparison to other categories of MIH.

Children with and without MIH, with similar caries experience showed no difference in OHRQoL. However, the presence of the severe form of MIH including hypersensitivity and enamel disintegration negatively impacted those children’s OHRQoL.