| Summary: | Background: Molar-Incisor Hypomineralization (MIH) prevalence in paediatric patients has been widely studied. However, most of the available studies have utilised criteria that did not offer consistent diagnostic and calibration tools, which resulted in incomparable results. Aim: This study aims to find the prevalence of MIH in children in the city of Fujairah, United Arab Emirates, utilising the current standardised guidelines for diagnosis and calibration. Methods: Cross-sectional study. One hundred sixty-two school children aged 7–9 years in the city of Fujairah, UAE have been randomly selected and orally examined for the presence of MIH lesions. This was conducted following Ghanim et al [2015] guidelines and after calibrating examiners following Ghanim et al. [2017] training manual. Results: MIH prevalence was 38.9% in the sample. No significant differences were found between genders with higher cases among females, but differences were statistically significant between age groups 8 and 9 years old (p < 0.05). Most of the lesions were mild (62%). Lower right first permanent molars had the highest occurrences and severity of MIH lesions. Conclusion: MIH prevalence was high in the city of Fujairah, UAE. More studies utilising the standardised criteria are required for valid comparisons. Further research on the aetiology of MIH is also needed. © 2023, European Journal of Paediatric Dentistry. All Rights Reserved.
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