The effect of abrasion on corrosion of dental Co-Cr alloys. An in vitro study

The effect of abrasion on corrosion of dental Co-Cr alloys. An in vitro study

The effect of abrasion on corrosion of two dental Co-Cr alloys was investigated in vitro. The metals were abraded with a toothbrush and with a piece of tooth enamel. Changes in corrosion potentials and metal release due to the abrasion were measured. Abrasion by tooth enamel caused a persistent drop...

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Bibliographic Details
Published in:Acta odontologica Scandinavica Vol. 43; no. 2; p. 69
Main Authors: de Melo, J F, Gjerdet, N R, Erichsen, E S
Format: Journal Article
Language:English
Published: England 1985
Subjects:
Chromium Alloys
Corrosion
Dental Enamel
Electrochemistry
Humans
Stress, Mechanical
Surface Properties
Time Factors
Toothbrushing
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Summary:The effect of abrasion on corrosion of two dental Co-Cr alloys was investigated in vitro. The metals were abraded with a toothbrush and with a piece of tooth enamel. Changes in corrosion potentials and metal release due to the abrasion were measured. Abrasion by tooth enamel caused a persistent drop in corrosion potentials. The release of both chromium and, in particular, cobalt was higher than during brushing. The two alloys tested did not significantly differ with regard to mode and rate of corrosion. It was demonstrated that the corrosion behavior of electrochemically passive dental alloys was affected by abrasion of a magnitude normally encountered during clinical service.
ISSN:0001-6357
DOI:10.3109/00016358509046489