title: Ultrastructural organization and microanalysis studies of deciduous enamel crystallites in regional odontodysplasia (RO).
abstract: The ultrastructural organization and chemical components of enamel crystallites in two deciduous teeth affected by RO, an uncommon developmental condition giving the tooth a ghost-like appearance, were investigated by scanning and transmission electron microscopy, X-ray diffraction, electron probe microanalysis and Fourier transform improved microspectroscopy. Pathologic mineralizations involving prismatic structures, which affected the size, shape and stoichiometric structure of crystallites and led to enhanced Mg/Ca and Na/Ca ratios and crystal defects, were observed. Local circulatory disorders may have caused this developmental anomaly.
authors.affiliation: Laboratoire de Recherches sur les Tissus Calcifiés et les Biomatériaux, University of Nantes, France.
authors.forename: R
authors.initials: R
authors.lastname: Rohanizadeh
authors.forename: J
authors.initials: J
authors.lastname: Pouëzat
authors.forename: W
authors.initials: W
authors.lastname: Bohne
authors.forename: J C
authors.initials: JC
authors.lastname: Ajacques
mesh_terms: D002675:Child, Preschool; D003460:Crystallization; D018360:Crystallography, X-Ray; D003743:Dental Enamel / Q000737:chemistry* / Q000473:pathology / Q000648:ultrastructure*; D017886:Durapatite / Q000737:chemistry; D004577:Electron Probe Microanalysis; D005260:Female; D006801:Humans; D008854:Microscopy, Electron; D018126:Odontodysplasia / Q000473:pathology*; D017550:Spectroscopy, Fourier Transform Infrared; D014094:Tooth, Deciduous / Q000473:pathology*
chemical_list: D017886:Durapatite