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Publication Citation: Diffusion of Ions between Two Solutions Saturated With Respect to Hydroxyapatite: A Mechanism for Subsurface Demineralization of Teeth

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Author(s): Laurence C. Chow;
Title: Diffusion of Ions between Two Solutions Saturated With Respect to Hydroxyapatite: A Mechanism for Subsurface Demineralization of Teeth
Published: July 17, 2010
Abstract: Diffusion-controlled dissolution and precipitation reactions occur in many biological systems and some non-stirred in vitro systems. Previous studies have shown that differences in the diffusion rates of ions involved in a dissolution/precipitation reaction can produce significant effects on the rate and course of the reaction. We report here results of a study that show inter-diffusion of ions between two solutions, both saturated with respect to hydroxyapatite but with dissimilar compositions, resulted in one solution becoming undersaturated and the other supersaturated. A model is proposed that may explain the formation of a mineral-dense layer in the caries process.
Citation: Journal of Research (NIST JRES) -
Volume: 115
Issue: 4
Pages: pp. 217 - 224
Keywords: Dissolution; precipitation; diffusion; calcium phosphate; hydroxyapatite; caries; demineralization
Research Areas: Biomaterials, Materials Science
PDF version: PDF Document Click here to retrieve PDF version of paper (421KB)