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Title
  • en Surface analysis of dental amalgams by X-ray photoelectron spectroscopy and X-ray diffraction
Creator
    • en Berglund, Anders
    • en Cardenas, Juan
    • en Pohl, Lars
    • en Bergman, Maud
    • en Sjöberg, Staffan
Accessrights open access
Subject
  • Other en Amalgam
  • Other en Surface analysis
  • Other en X-ray photoelectron spectroscopy
  • Other en X-ray diffraction
  • Other en Mercury
  • Other en Vapor
  • NDC 497
Description
  • Abstract en Objectives: It is important to characterize the surface of dental amalgam in order to understand the process of mercury release from amalgam restorations in the oral cavity. The mercury evaporation occurs not only from the newly made restoration but also from the set material. Methods: The surfaces of four different types of amalgams, which had been well set, were analyzed with X-ray photoelectron spectroscopy (XPS) and X-ray diffraction (XRD) and the relationship between surface compositions and mercury release was studied. Fresh amalgam surfaces as well as aged surfaces, which were stored for 30 days in air, were investigated using XPS and the chemical states of amalgam components and oxygen were studied. The aged surfaces were also characterized with XRD and grazing angle XRD. Results: With increased oxidation, the surface contents of tin and oxygen were increased in all amalgams. In contrast, the surface contents of copper and mercury were decreased. An increase of zinc or indium content were observed in zinc or indium containing amalgams, respectively. A surface layer enriched with indium and oxygen was clearly detected by XPS but not with grazing angle XRD. Significance: The thickness of the enriched surface layer is estimated to be in the order of few nanometer, which is approximately equal to the analysis depth of XPS. In addition, the presence of metallic elements, like tin and zinc, that readily form a stable oxide layer at the surface suppress the release of mercury.
Publisher en Elsevier Science
Date
    Issued2003-11
Language
  • eng
Resource Type journal article
Version Type AM
Identifier HDL http://hdl.handle.net/2115/16979
Relation
  • URI http://www.sciencedirect.com/science/journal/01095641
  • isVersionOf DOI https://doi.org/10.1016/S0109-5641(03)00007-1
  • PMID 12901989
Journal
    • PISSN 0109-5641
      • en Dental Materials
      • Volume Number19 Issue Number7 Page Start639 Page End644
File
Oaidate 2023-07-26