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  • Title: Cross-sectional hardness of enamel from human teeth at different posteruptive ages.
    Author: Cardoso CA, Magalhães AC, Rios D, Lima JE.
    Journal: Caries Res; 2009; 43(6):491-4. PubMed ID: 20016180.
    Abstract:
    This study evaluated, by cross-sectional hardness (CSH), enamel maturation at different depths in sound human teeth at different posteruptive ages (12 per age group): unerupted (molars; control), 2-3 years (premolars), 4-10 years (premolars) and >10 years (molars). Cross-sectional Knoop hardness was measured at 10, 30, 50, 70, 90, 110, 220 and 330 mm depth from the surface. The data were subjected to two-way ANOVA followed by Bonferroni's pairwise tests (a = 0.05). The CSH significantly increased with posteruptive age, indicating that the time of exposure in the oral cavity might result in deep enamel maturation.
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