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Scanning electron micrograph analysis of hypomineralized enamel in permanent first molars.

Artikel i vetenskaplig tidskrift
Författare Birgitta Jälevik
W Dietz
Jörgen G Norén
Publicerad i International Journal of Paediatric Dentistry
Volym 15
Nummer/häfte 4
Sidor 233-40
ISSN 0960-7439
Publiceringsår 2005
Publicerad vid Odontologiska institutionen, Avdelningen för pedodonti
Sidor 233-40
Språk en
Länkar dx.doi.org/10.1111/j.1365-263X.2005...
Ämnesord Dental Enamel, ultrastructure, Dental Enamel Hypoplasia, ultrastructure, Humans, Microscopy, Electron, Scanning, Molar, pathology, Porosity
Ämneskategorier Pedodonti

Sammanfattning

First molars with cream- to yellow-coloured demarcated opacities of the enamel, often in combination with severe loss of substance, are common in many child populations. The aetiology is obscure. AIM AND METHOD: The aim of this study was to study the ultrastructure of the enamel of 10 affected teeth by means of scanning electron microscopy (SEM) in order to gain a better understanding of the clinical appearance and treatment problems of this condition, and to find some clues to its aetiology. RESULTS: The basic enamel structure with enamel rods and interrod zones was found in porous parts of the enamel, as well as in normal parts, but the packing of the hydroxylapatite crystals seemed to be looser and less well organized in the porous parts. The border between normal and hypomineralized enamel was usually distinct, and followed the direction of the rods. The preserved basic structure indicates normal function of the ameloblasts during their secretion phase, but impaired function during their maturation stage. CONCLUSION: Considering the poor etch profile, it seems reasonable to recommend removal of all affected enamel surrounding the cavity, if possible, and to use a glass ionomer filling with its chemical bonding to tooth substrate, when restoring first molars with remaining affected enamel.

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