Enamel hypomineralization of permanent first molars: a morphological study and survey of possible aetiological factors

Abstract

The hypomineralized enamel in the investigated teeth demonstrated areas of porosity of varying degrees. The yellow/brown defects were more porous than the white-cream and extended through the whole enamel layer, while the white-cream opacities were situated in the inner parts of the enamel. There had probably been an interacting disturbance of short duration of systemic origin of the activity of the ameloblast during the first 2 years of the child's life, resulting in chronological dispersed hypomineralized demarcated opacities in the developing teeth.

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

“…This result is in agreement with some studies reporting similar distributions of MIH in molars from both arches (3,15,16), but contrasted with other studies reporting that mandibular (12,17) or maxillary (4,18,19) molars were affected more frequently. In agreement with the results of other studies (17,19), MIH affected the maxillary incisors more frequently than the mandibular incisors in the present study.…”

“…Autori su se za to stanje koristili sljedećim nazivima: hipomneralizirani trajni prvi kutnjaci, idiopatska caklinska hipomineralizacija, nefluoridna hipomineralizacija i sirasti kutnjaci (1,2,3). Caklinska hipoplazija (EH) može uključi-vati kvantitativne defekte u caklini zbog poremećaja ameloblasta tijekom stvaranja matriksa (4,5,6) i/ili kvalitativne defekte potaknute poremećajem u početnoj mineralizaciji i/ili sazrijevanju cakline (4,5). Pojam molarna incizalna hipomineralizacija (MIH) prihvaćen je na sastanku Europske akademije dječje dentalne medicine za određivanje kvalitativnih defekata cakline koji pogađaju jedan od četiriju prvih trajnih kutnjaka, a slični se defekti pojavljuju i na trajnim sjekutićima i očnjacima (7).…”

“…Dobiveni rezultati slažu se s istraživanjima sa sličnom raspodjelom MIH-a na kutnjacima u oba zubna luka (3,15,16), ali se razlikuju od istraživanja u kojima se tvrdi da su MIH-om češće zahvaćeni mandibularni (12,17) ili maksilarni kutnjaci (4,18,19). U skladu s rezultatima drugih istraživanja (17,19), u ovome MIH pogađa maksilarne kutnjake češće nego mandibularne sjekutiće.…”

“…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).…”

Paleohealth based on dental pathology and cribra orbitalia from the ancient Egyptian settlement of Qau

“…Because the enamel is formed in the period from infancy to childhood (Jalevik and Noren, 2000), enamel hypoplasia is unrelated to changes with aging. Moreover, LEH frequencies in both early middle-aged males and females were very similar, and this indicates that even if malnutrition had occurred in infancy, the proportion of boys and girls affected by malnutrition was the same (Obertova and Thurzo, 2008).…”