Hoe serious is Molar Incisor Hypomineralisation (MIH) among 8- and 9- year-old children in Bosnia-Herzegovina? A clinical study

Aim: To determine the prevalence of MIH in 8- and 9 year-old children in the city of Kljuc, BosniaHerzegovina, and to describe the distribution and severity of the affected teeth. Materials and methods: Study design: All 8- and 9-year-olds (n=104) living in Kljuc (born 2004/2005) were invited to participate, and 103 were examined by a calibrated clinician. Written, informed consent was obtained from all participants’ relatives, as well as a questionnaire designed to assess potential risk indicators. Index teeth were all permanent first molars and incisors (12 teeth). Opacities (>1mm), post eruptive breakdown (PEB), atypical restorations and previous extractions caused by MIH were registered. Results: The prevalence of MIH was 11.7% (n=12), significantly higher for girls than for boys (14.6% vs. 9.7%; p<0.05). The maxillary first molars and incisors were 1.8 (p<0.02) and 2.3 (p