title: X-ray Study of Human Dental Tissues Affected by Erythroblastosis Fetalis.
abstract: Numerous diseases are known to cause microstructural alteration of dental tissues structure. One type in particular is associated with neonatal jaundice and circulation of bilirubin in blood at high concentration due to increased hemolysis in conditions such as erythroblastosis fetalis, septicemia, biliary atresia, and other causes of hyperbilirubinemia. In those conditions, the products of the catabolism of hemoglobin end up deposited in various tissues, including teeth, where they can present clinically as visibly stained brown/green teeth. There is almost no information on the nature or extent of the structural changes taking place in these conditions. Here, advanced nondestructive wide-angle synchrotron X-ray scattering techniques combined with scanning microscopy methods were used to investigate for the first time the ultrastructure of the dental hard tissues in an archival case of intrinsically pigmented green teeth. Despite no obvious elemental variation across the pigmented tissue region, the high-resolution crystallographic properties probed by wide-angle synchrotron X-ray scattering revealed an ultrastructural variation (orientation, particle size, and lattice parameter of hydroxyapatite crystallites) associated with a pigmentation line in dentine and with a distinct neonatal line in enamel.
authors: Multi-Beam Laboratory for Engineering Microscopy, Department of Engineering Science, University of Oxford, Oxford, UK tan.sui@eng.ox.ac.uk.
authors: T
authors: T
authors: Sui
authors: Multi-Beam Laboratory for Engineering Microscopy, Department of Engineering Science, University of Oxford, Oxford, UK.
authors: S
authors: S
authors: Ying
authors: Multi-Beam Laboratory for Engineering Microscopy, Department of Engineering Science, University of Oxford, Oxford, UK.
authors: A M
authors: AM
authors: Korsunsky
authors: School of Dentistry, College of Medical and Dental Sciences, University of Birmingham, Birmingham, UK.
authors: G
authors: G
authors: Landini
mesh_terms: D003461:Crystallography / Q000379:methods; D003743:Dental Enamel / Q000000981:diagnostic imaging / Q000648:ultrastructure; D003804:Dentin / Q000000981:diagnostic imaging / Q000648:ultrastructure; D017886:Durapatite / Q000737:chemistry; D004899:Erythroblastosis, Fetal / Q000000981:diagnostic imaging* / Q000473:pathology; D005453:Fluorescence; D006461:Hemolysis; D006801:Humans; D007231:Infant, Newborn; D007834:Lasers; D018613:Microscopy, Confocal; D010316:Particle Size; D011859:Radiography; D012542:Scattering, Radiation; D013052:Spectrometry, X-Ray Emission; D017356:Synchrotrons; D014070:Tooth / Q000000981:diagnostic imaging* / Q000648:ultrastructure; D014075:Tooth Discoloration / Q000000981:diagnostic imaging* / Q000473:pathology; D014094:Tooth, Deciduous / Q000000981:diagnostic imaging / Q000648:ultrastructure; D014961:X-Ray Diffraction
chemical_list: D017886:Durapatite
keywords: bilirubin; dental enamel; dentine; neonatal jaundice; pigments; tooth