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Crush Absorbing Energy of White Spot Lesion Measured by Indentation Tests

  • Alison M. Fallgatter (a1), Ching-Chang Ko (a2) and C-H Chou (a3)


White spot lesions are clinically detectable areas of demineralized enamel that often form during orthodontic treatment. Fluoride has been shown to prevent demineralization from occurring. Mechanical properties of white spot lesions are not well characterized. Bovine enamel slabs, with and without fluoride treatment, were placed under demineralization conditions. Through a series of microindentations at incremental loads, mechanical strength was measured using a novel method, SVAE. Specific Volume Absorbing Energy (SVAE) is equal to work energy divided by the indentation volume. The supra-surface area (outmost 5 μm) of enamel slabs with fluoride demonstrated decreased mechanical strength compared to those without fluoride. Fluoride may not impart protection over long periods of demineralization.



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1. Zachrisson, B and Zachrisson, S(1971). Caries incidence and orthodontic treatment with fixed appliances. Scandinavian Journal of Dental Research 79: 183192.
2. Chang, H, Walsh, L and Freer, T (1997). Enamel demineralization during orthodontic treatment. Aetiology and prevention. Australian Dental Journal 42:(5): 322327.
3. Tao, W, Robertson, R, Thornton, P (1993). Effects of Material Poperties and Crush Conditions on the Crush Energy Absorption of Fiber Composite Rods. Composites Science and Technology 47: 405418.
4. ten Cate, JM, Duijsters, PP (1983a). Influence of fluoride in solution on tooth demineralization. I. Chemical data. Caries Res 17:193199.
5. Caldwell, R. C., Gilmore, R. W., Timberlake, P., Pigman, J., Pigman, W (1958). Semiquantitative Studies of In Vitro Caries by Microhardness Tests. Journal of Dental Research. 37(2): 301305.
6. Stookey, GK (1996) Early detection of dental caries. Indiana University School of Dentistry.
7. Arends, J, ten Bosch, JJ (1986). In vivo de- and remineralization of dental enamel. In: Factors Relating to Demineralisation and Remineralisation of the Teeth. Leach, SA, editor. Osford, England: IRL Press Limited, pp. 111.
8. Featherstone, JD, ten Cate, JM, Shariati, M, Arends, J (1983). Comparison of artificial caries-like lesions by quantitative microradiography and microhardness profiles. Caries Res 17: 385391.



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