Diffusion of ions between two solutions saturated with respect to hydroxyapatite: A possible mechanism for subsurface demineralization of teeth | Zendy

L.C. Chow | Zendy

Open Access

Diffusion of ions between two solutions saturated with respect to hydroxyapatite: A possible mechanism for subsurface demineralization of teeth

Author(s) -

L.C. Chow

Publication year - 2010

Publication title -

journal of research of the national institute of standards and technology

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.202

H-Index - 59

eISSN - 2165-7254

pISSN - 1044-677X

DOI - 10.6028/jres.115.015

Subject(s) - demineralization , diffusion , mechanism (biology) , materials science , ion , dentistry , thermodynamics , chemistry , composite material , enamel paint , medicine , physics , organic chemistry , quantum mechanics

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 the 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.

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