Crevice corrosion products of dental amalgam

Journal Article · Mon Jul 01 00:00:00 EDT 1991 · Journal of Dental Research; (United States)

DOI:https://doi.org/10.1177/00220345910700071301· OSTI ID:5449990

Sutow, E J; Jones, D W; Hall, G C; Owen, C G ^[1]

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1. Division of Dental Biomaterials Science, Faculty of Dentistry, Dalhousie University, Halifax, Nova Scotia (Canada)

The objective of this study was to determine the in vitro corrosion products that resulted from crevice corrosion of low- and high-copper dental amalgams. Specimens were potentiostatically polarized in a chloride-containing electrolyte while set against a PTFE surface to form a crevice. After 16 h, corrosion products were examined by light microscopy, SEM, EDS, and XRD. Analysis showed the presence of three previously reported products (Sn4(OH)6Cl2, SnO, and Cu2O) and a new product, CuCl, which formed on high-copper, {gamma} 2-free amalgams. Thermodynamic considerations show that CuCl is stable for the reported in vivo potentials of amalgam restorations and the high acidity and high chloride ion concentration associated with crevice corrosion.

• OSTI ID: 5449990
• Journal Information: Journal of Dental Research; (United States), Vol. 70:7; ISSN 0022-0345
• Country of Publication: United States
• Language: English

Related Subjects

62 RADIOLOGY AND NUCLEAR MEDICINE
COMPOSITE MATERIALS
CORROSION
TEETH
CARIES
COPPER
DENTISTRY
ELECTROLYTES
ELECTRON MICROPROBE ANALYSIS
HYDROLYSIS
MATERIALS TESTING
SURFACE PROPERTIES
THERMODYNAMICS
TIN
X-RAY DIFFRACTION
CHEMICAL ANALYSIS
CHEMICAL REACTIONS
COHERENT SCATTERING
DECOMPOSITION
DIFFRACTION
DIGESTIVE SYSTEM
ELEMENTS
LYSIS
MATERIALS
MEDICINE
METALS
MICROANALYSIS
NONDESTRUCTIVE ANALYSIS
ORAL CAVITY
PATHOLOGICAL CHANGES
SCATTERING
SOLVOLYSIS
TESTING
TRANSITION ELEMENTS
550602* - Medicine- External Radiation in Diagnostics- (1980-)