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- W2123284461 abstract "Erosive attack on enamel leads to a bulk material loss and a partial demineralisation at the lesion body. This zone of softened enamel has a reduced physical stability and large interprismatic porosities. The aim of the current study was to measure the degree of demineralisation with respect to the content of calcium and inorganic phosphorus in softened enamel using ultrasonication and chemical analysis. The erosive demineralisation was to be compared with demineralisation in caries.Erosion of 10 polished human enamel samples was performed in 0.3% citric acid adjusted to pH 3.2 at 35 degrees C in a slowly stirred solution, each in a volume of 15 ml. After erosion the softened enamel was removed by ultrasonication in 2 ml of deionised water and enamel crystals were dissolved by adding 220 microl of 1M HCl. Substance loss was measured profilometricaly after erosion and after ultrasonication. Surface size of eroded enamel was measured thus volume loss could be calculated. Calcium and phosphate ion concentration in the solutions were measured after ultrasonication.Citric acid erosion caused a mean substance loss of 16.0 microm (SD 2.5 microm) and further enamel softening of 2.4 microm (SD 1.5 microm). The degree of demineralisation of softened enamel, in comparison the original mineral content, was 62% for calcium and 64% for inorganic phosphorus was calculated.The high degree of demineralisation shown in the current study explains the instability of softened enamel even against mild physical impact." @default.
- W2123284461 created "2016-06-24" @default.
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- W2123284461 date "2009-06-01" @default.
- W2123284461 modified "2023-10-16" @default.
- W2123284461 title "Degree of mineral loss in softened human enamel after acid erosion measured by chemical analysis" @default.
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- W2123284461 doi "https://doi.org/10.1016/j.jdent.2009.02.001" @default.
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