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In vitro corrosion of dental amalgam phases

✍ Scribed by Marek, M. ;Hochman, R. F. ;Okabe, T.

Publisher: John Wiley and Sons
Year: 1976
Tongue: English
Weight: 761 KB
Volume: 10
Category: Article
ISSN: 0021-9304
DOI: 10.1002/jbm.820100511

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✦ Synopsis

The effects of corrosion on the major phases of dental amalgam microstructure have been studied in vitro on samples prepared by electroplating mercury on AgaSn. Tests were made in synthetic saliva, and samples were examined in a scanning electron microscope before and after the exposure.

Contact of amalgam with gold increased the probability of deterioration of the y2 phase. By anodic polarization beyond the breakdown potential, the yz phase was selectively dissolved. Under conditions simulating a crevice, the 7 2 phase was dissolved and the y1 phase suffered morphological changes.

Simple immersion had little effect on the phases.

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