Raue, Lars

[["dc.bibliographiccitation.firstpage","591"],["dc.bibliographiccitation.issue","8"],["dc.bibliographiccitation.journal","Acta Odontologica Scandinavica"],["dc.bibliographiccitation.lastpage","596"],["dc.bibliographiccitation.volume","72"],["dc.contributor.author","Raue, Lars"],["dc.contributor.author","Hartmann, Christiane D."],["dc.contributor.author","Roediger, Matthias"],["dc.contributor.author","Buergers, Ralf"],["dc.contributor.author","Gersdorff, Nikolaus"],["dc.date.accessioned","2018-11-07T09:33:06Z"],["dc.date.available","2018-11-07T09:33:06Z"],["dc.date.issued","2014"],["dc.description.abstract","Objective. A major aspect in evaluating the quality of dental materials is their physical properties. Their properties should be a best fit of the ones of dental hard tissues. Manufacturers give data sheets for each material. The properties listed are characterized by a specific value. This assumes (but does not prove) that there is no direction dependence of the properties. However, dental enamel has direction-dependent properties which additionally vary with location in the tooth. The aim of this paper is to show the local direction dependence of physical properties like the elastic modulus or the thermal expansion in dental hard tissues. With this knowledge the 'perfect filling/dental material' could be characterized. Materials and method. Enamel sections of similar to 400-500 mu m thickness have been cut with a diamond saw from labial/buccal to palatal/lingual (canine, premolar and molar) and parallel to labial (incisor). Crystallite arrangements have been measured in over 400 data points on all types of teeth with x-ray scattering techniques, known from materials science. Results. X-ray scattering measurements show impressively that dental enamel has a strong direction dependence of its physical properties which also varies with location within the tooth. Dental materials possess only little or no property direction dependence. Therefore, a mismatch was found between enamel and dental materials properties. Conclusion. Since dental materials should possess equal (direction depending) properties, worthwhile properties could be characterized by transferring the directional properties of enamel into a property 'wish list' which future dental materials should fulfil. Hereby the 'perfect dental material' can be characterized."],["dc.description.sponsorship","Deutsche Forschungsgemeinschaft (DFG)"],["dc.identifier.doi","10.3109/00016357.2013.878391"],["dc.identifier.isi","000344330400005"],["dc.identifier.pmid","24460030"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/31894"],["dc.notes.status","zu prüfen"],["dc.notes.submitter","Najko"],["dc.publisher","Informa Healthcare"],["dc.relation.issn","1502-3850"],["dc.relation.issn","0001-6357"],["dc.title","Anisotropic local physical properties of human dental enamel in comparison to properties of some common dental filling materials"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dc.type.peerReviewed","yes"],["dc.type.status","published"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.firstpage","271"],["dc.bibliographiccitation.issue","3"],["dc.bibliographiccitation.journal","Archives of Oral Biology"],["dc.bibliographiccitation.lastpage","276"],["dc.bibliographiccitation.volume","57"],["dc.contributor.author","Raue, Lars"],["dc.contributor.author","Gersdorff, Nikolaus"],["dc.contributor.author","Roediger, Matthias"],["dc.contributor.author","Klein, Hannah"],["dc.date.accessioned","2018-11-07T09:12:44Z"],["dc.date.available","2018-11-07T09:12:44Z"],["dc.date.issued","2012"],["dc.description.abstract","The knowledge about the orientation of the prisms in human dental enamel is mainly based on morphological observations (light optical, SEM, etc.). Hence there are many schematic drawings, showing the orientation as seen in the microscope. Locally resolved direct measurements of the orientations, proofing the observations, have not been done in detail up to now. X-ray diffraction methods adapted from material science are used in this study, providing directly the orientation of the crystallites in the examined positions. Hereby new and better detailed information was obtained, showing the orientation of the prisms and giving information about their intrinsic structure. Based on the measurements, existing prism orientation models can be enhanced and two structural suggestions can be made, showing possible inner building principles for the prisms. Future planned measurements will even allow deciding which of the two models is more likely. (C) 2011 Elsevier Ltd. All rights reserved."],["dc.identifier.doi","10.1016/j.archoralbio.2011.08.015"],["dc.identifier.isi","000301995800009"],["dc.identifier.pmid","21975115"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/27011"],["dc.notes.status","zu prüfen"],["dc.notes.submitter","Najko"],["dc.publisher","Pergamon-elsevier Science Ltd"],["dc.relation.issn","0003-9969"],["dc.title","New insights in prism orientation within human enamel"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dc.type.peerReviewed","yes"],["dc.type.status","published"],["dspace.entity.type","Publication"]]