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  • Title: Corrosion products from dental alloys and effects of mercuric and cupric ions on a neuroeffector system.
    Author: Moberg LE.
    Journal: Swed Dent J Suppl; 1985; 29():1-51. PubMed ID: 3866332.
    Abstract:
    The release of corrosion products during long-term immersion in vitro of dental alloys, with particular reference to dissimilar alloys in contact has been studied. The effects of Hg2+ and Cu2+ in low concentrations on the guinea-pig ileum have also been studied. The following conclusions were drawn: In an aggressive solution the release of elements from amalgams could be continuous and subsurface corrosion could cause a considerable increase in the corrosion products released. The change in microstructure observed in cross-sections of the corroded specimens was related to the amounts of corrosion products released into the saline solution. In an aggressive solution the corrosion products could increase when amalgams, Co-Cr, and Ni-Cr alloys are in contact with gold alloys, a high-Cu amalgam is in contact with a conventional amalgam, a type III gold alloy is in contact with gold alloys for metallo-ceramic purposes. The high-Cu amalgams released more corrosion products into the saline solution than a conventional one. Greater quantities of corrosion products were released from amalgams at pH 4 than at pH 6. Hg2+ and Cu2+ both had diverse and dose-dependent effects on the guinea-pig ileum. In low concentrations, 10nM, both ions exerted effects, probably on the muscle cell membrane.
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