Abstract

Background and objectives: Molar incisor hypomineralization (MIH) is a common developmental disturbance of the enamel involving the permanent incisors and first molars. There is no account of data regarding the prevalence of MIH in Bahrain, till date. The aim of the study was to ascertain the prevalence of MIH in seven–nine-year-old children attending government schools in Bahrain.
Methods: This cross-sectional descriptive survey consisted of 760 children aged seven–nine years, attending government schools located in the four governorates in Bahrain. Dental screenings were conducted and MIH was diagnosed according to the European Academy of Pediatric Dentistry, 2003 judgment criteria.
Results: The prevalence of MIH was 17.6%, which decreased with age. The highest prevalence rate was found in Muharraq and the odds of children diagnosed with severe MIH were more in the Southern Governorate. Demarcated opacity was the most common dental defect, which affected the molars and incisors. Significantly larger numbers of maxillary first permanent molars and incisors were diagnosed with MIH.
Conclusion: MIH was common in children’s permanent teeth, with some intra-country variation. A predilection for maxillary teeth being affected with MIH opacities was clearly revealed. There is a need for regular follow-ups with regard to the prevalence of MIH.

Keywords: Molar incisor hypomineralization, demarcated opacities, developmental dental defects, enamel defects, prevalence, proportion.