Prevalence of molar incisor hypomineralization in Egypt as measured by enamel defect index a cross sectional study

Aim: This study aimed to estimate the prevalence of molar incisor hypomineralization (MIH) in a group of Egyptian children the aged from 8 to 12 years, using both enamel defect index (EDI) and the diagnostic criteria. Subjects and methods: Sampling was done per unit of time (convenience sample) from 1st of December 2014 till 30th of November 2015 (one year). Clinical visual examination took place on the dental unit, using natural light, teeth were cleaned gently using gauze and were wet with saliva when examined. After dental screening of children, (MIH) data was scored including 12 indexed teeth using the EDI, diagnostic criteria and severity index. Statistical analysis was performed using IBM® SPSS® and data was presented as frequency and percentages. Results: 1001 children were included in the study (49.85%) males (50.14%) females. Prevalence rate calculated in the studied group was (2.3%); males (39.1%) and females (60.9%). The most prevalent clinical defect of MIH was the opacity. Among affected teeth it was found (77%) of the observed affected teeth were mildly affected while (23%) were severely affected. Conclusion: EDI and diagnostic criteria deliver an acceptable estimate for MIH in the Egyptian population, however further studies are recommended