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Abstract
Objective: The purpose of this study was to find out the prevalence and severity of molar incisor hypomineralization among a group of Egyptian children was seeking for dental treatment in pediatric and dental public health department at the Faculty of dentistry, Cairo university. Material and methods: The entire patients who attended the outpatient clinic on the days of examination were examined on the same day for evaluation of presence or absence of molar incisor hypomineralization. Examined patients were considered enrolled if they wear no space maintainer or any other orthodontic appliance and they not suffered from any systemic disease. Patients were either both free of MIH and got dismissed yet contributed in being part of the sample, or diagnosed with MIH which was confirmed by the calibrated evaluator only when at least one the FPM show any of diagnostic criteria of MIH according to modified index developed in line with EAPD criteria. Clinical examination of all children was performed by examiner in a dental chair using mirror, dental explorer to clean the molar fissures. master degree student, Faculty of dentistry, Cairo university. Associate professor of pediatric dentistry, Faculty of dentistry, Cairo university. Associate professor of pediatric dentistry, Faculty of dentistry, Cairo university