Effect of time in hardness test on artificially demineralized human dental enamel

Autor: Mirian de Waele Souchois Marsillac, Alberto Carlos Botazzo Delbem, Ricardo de Sousa Vieira
Jazyk: angličtina
Rok vydání: 2016
Předmět:
Zdroj: Brazilian Journal of Oral Sciences, Vol 7, Iss 24 (2016)
Druh dokumentu: article
ISSN: 1677-3225
DOI: 10.20396/bjos.v7i24.8643022
Popis: A cross-sectional microhardness (CSMH) test was carried out in human dental enamel exposed to a demineralizing solution in order to evaluate two different times of indentation in sound tissue and artificially induced caries. Twenty caries-free extracted human molars had one of their smooth surfaces sectioned and the enamel surface was isolated with nail polish except for an area of 6 mm2 . These specimens were submitted to artificially induced enamel caries on a lactate buffer containing 0.1 ppm fluoride (F) during 28 days. All specimens were bisected to create groups A and B in which CSMH test was performed employing a Knoop indenter with a 25 g load for 5 or 10 s, respectively. Student’s paired t-test (p
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