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Journal of Dental Research
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Correlation of Dental Amalgam Crevice Corrosion with Clinical Ratings

E.J. Sutow

Division of Dental Biomaterials Science, Faculty of Dentistry, Dalhousie University, Halifax, Nova Scotia, Canada B3H 3J5

D.W. Jones

Division of Dental Biomaterials Science, Faculty of Dentistry, Dalhousie University, Halifax, Nova Scotia, Canada B3H 3J5

G.C. Hall

Division of Dental Biomaterials Science, Faculty of Dentistry, Dalhousie University, Halifax, Nova Scotia, Canada B3H 3J5

In vitro corrosion behavior of {gamma}2-containing and {gamma}2-free dental amalgams was examined under crevice conditions which simulated the amalgam-tooth interface. By means of potentiostatic testing, currentdensity/time behavior and integrated anodic current were measured for 16 hr. All of the amalgams demonstrated crevice corrosion susceptibility. Crevice corrosion propagation for {gamma}2-free vs. {gamma}2-containing amalgams was characterized by lower acceleration and maximum rates during the most dynamic period. Integrated anodic current results were correlated with marginal breakdown ratings reported in two clinical investigations. Strong and significant coefficients were found between integrated current and marginal breakdown ratings when {gamma}2-containing and {gamma} 2-free amalgams were correlated as a single group, but not when correlated separately.

Journal of Dental Research, Vol. 68, No. 2, 82-88 (1989)
DOI: 10.1177/00220345890680021301
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E.J. Sutow, D.W. Jones, G.C. Hall, and C.G. Owen
Crevice Corrosion Products of Dental Amalgam
Journal of Dental Research, July 1, 1991; 70(7): 1082 - 1087.
[Abstract] [PDF]