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Vol. 19, No. 6, 1985
Issue release date: 1985
Caries Res 1985;19:490–496
(DOI:10.1159/000260887)
Basic Science

Lesion Formation and Lesion Remineralization in Enamel under Constant Composition Conditions

A New Technique with Applications

Buskes J.A.K.M.a · Christoffersen J.b · Arends J.a
aDental School, State University Groningen, The Netherlands; bMedicinsk-Kemisk Institut, Panum Institute, University of Copenhagen, Denmark

Abstract

A new apparatus for the de- and remineralization of enamel in vitro under constant composition conditions is described. A de- or remineralizing solution flows over the specimens at a controlled rate. During artificial lesion formation (using an acetate buffer containing methylhydroxydiphosphonate, MHDP), the composition of the solution is constant. The Ca and phosphate variation is less than 3%, pH variation is less than 0.03 pH unit. For enamel these variations are within the biological variations between enamel specimens. Experimentally it was found that the liquid streaming over the enamel surface does not measurably remove material from the surface (erosion) with the experimental error of 0.1 μm. This was measured by following microhardness indentations during demineralization. The effect of various MHDP concentrations on demineralization was investigated in the range of 2–50 μM. Even low concentrations of MHDP prove to be effective in the microhardness increase and lesion depth reduction during demineralization. In the demineralization experiment it is shown by means of microradiography, hardness measurements as well as light microscopy that the method described quickly produces reproducible lesions. In a remineralization experiment of demineralized enamel effective remineralization of the lesions occurs in 360 h, giving a threefold increase in microhardness and a twofold decrease in lesion depth.

 goto top of outline Author Contacts

J.A.K.M. Buskes, Dental School, State University Groningen, 9713 AV Groningen (The Netherlands)


 goto top of outline Article Information

Published online: November 18, 2009
Number of Print Pages : 7


 goto top of outline Publication Details

Caries Research

Vol. 19, No. 6, Year 1985 (Cover Date: 1985)

Journal Editor: Shellis R.P. (Bristol)
ISSN: 0008-6568 (Print), eISSN: 1421-976X (Online)

For additional information: http://www.karger.com/CRE


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