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Journal of Dental Research, Vol 69, 1175-1179, Copyright © 1990 by International & American Associations for Dental Research Online Journals

ARTICLES

The mechanism for erosion of glass-ionomer cements in organic-acid buffer solutions

M. Fukazawa, S. Matsuya and M. Yamane
Second Department of Conservative Dentistry, Faculty of Dentistry, Kyusyu University, Fukuoka, Japan.

The behavior and mechanism for erosion of glass-ionomer cements in organic-acid buffer solutions were studied as a function of time, pH, and citric-acid concentration. In acidic solutions, the dissolution of the cement was controlled by the diffusion of the eluted species in the cement matrix, which depended on H+ ion concentration. In citric-acid solutions, the dissolution of the cement was controlled by both the diffusion and the surface reaction between the acid anion and the eluted species. Contribution of the latter reaction was larger with the increase in the acid concentration.




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