Molar–Incisor Hypomineralisation

Possible Medical Aetiological Factors and Characteristics of Molar Incisor Hypomineralisation in a Group of Turkish Children

“…Authors have used various terms to refer to this condition, including 'hypomineralised permanent first molars', 'idiopathic enamel hypomineralisation', 'nonfluoride hypomineralisation', and 'cheese molars' (1,2,3). Enamel hypoplasia (EH) can involve a quantitative defect in the enamel resulting from the disturbance of ameloblasts during matrix formation (4,5,6) and/or a qualitative defect caused by disturbance during initial calcification and/or maturation (4,5). The term molar incisor hypomineralisation (MIH) was accepted at the meeting of the European Academy of Paediatric Dentistry to define qualitative defects of the enamel affecting one to four FPMs in association with similar defects in permanent incisors and canines (7).…”

“…Clinically, the defects appear as opaque lesions ranging in colour from white to yellow or brown, with sharp demarcations between the affected and sound enamel (5). Posteruptive enamel breakdown may occur rapidly under masticatory forces, resulting in atypical cavities or even complete coronal distortion requiring extensive restorative treatment (8,9).…”

Molar Incisor Hypomineralization in Monozygotic Twins: A Case Report

“…This follows the recommendations made by Weerheijm in 2003, 14 that the diagnosis of MIH is confirmed by clinical examination on clean and wet teeth ideally after the age of 8 years when all permanent incisors and first molars will mostly be erupted and that at least one FPM has to be affected. 8,14 Weerheijm et al 15 also proposed that the clinical appearance of the 4 FPMs and 8 incisors should be recorded for the following features which will aid in the correct diagnosis of the condition: presence or absence of demarcated opacities; post eruptive enamel breakdown; atypical restorations; extraction of a FPM; failure of eruption of a FPM or an incisor.…”

“…8,14 Weerheijm et al 15 also proposed that the clinical appearance of the 4 FPMs and 8 incisors should be recorded for the following features which will aid in the correct diagnosis of the condition: presence or absence of demarcated opacities; post eruptive enamel breakdown; atypical restorations; extraction of a FPM; failure of eruption of a FPM or an incisor. Teeth affected by MIH, with or without enamel loss, are often associated with hypersensitivity to air and cold stimuli.…”

“…Molar incisor hypomineralization (MIH) is a developmental qualitative enamel defect that was first defined by Weerheijm et al in 2001 1 as "hypomineralization of systemic origin of 1-4 First Permanent Molars (FPMs), frequently associated with affected incisors". Clinically, the hypomineralized areas appear as well demarcated opacities affecting the FPMs and incisors.…”