Yeditepe Dental Journal, vol.19, no.1, pp.10-16, 2023 (Peer-Reviewed Journal)
Aim: Molar-incisor hypomineralization (MIH) is a developmen- tal enamel defect in which white/creamy and/or yellow/brown demarcated opacities, post-eruptive enamel breakdown, at- ypical caries and restorations are observed. The aim of the study was to evaluate the distribution and characteristics of lesions in teeth with MIH.
Materials and Methods: 542 teeth of 70 patients between the ages of 8-12 who were diagnosed MIH according to the European Academy of Pediatric Dentistry criteria, selected from the university dental clinic, included in the study. Dist- ribution, characteristics and combined-defects in teeth with MIH were determined. Descriptive statistics and chi-squa- re test were performed to evaluate the data, and Spearman correlation analysis was used to determine the relationship between age and the number of affected-teeth.
Results: While defects due to MIH were observed at a rate of 64.2% in all teeth, this rate was found to be 85.7% in first molars and 53.9% in incisors. The most affected teeth were the left lower first molars with a rate of 91.4%, while the least affected teeth were the left lower central incisors with a rate of 41.4%. White/creamy opacities were the most common in incisors, and atypical caries in mo- lars were observed. Lesions were detected in all molars in 67.1% of the patients. While there was no statistically significant correlation between age and the number of affected-teeth (p=0.686), a significant correlation was observed between the number of incisors and total affe- cted-teeth and age (p=0.003 and p=0.004, respectively).
Conclusion: Lesion distribution and characteristics of MIH vary within and between individuals and affect- ed-teeth.
Key words: Molar-incisor hypomineralization, develop- mental enamel defects, hypomineralization.