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Please use this identifier to cite or link to this item: http://acervodigital.unesp.br/handle/11449/70280
Title: 
Effect of time in hardness test on artificially demineralized human dental enamel
Author(s): 
Institution: 
  • Universidade do Estado do Rio de Janeiro (UERJ)
  • Universidade Estadual Paulista (UNESP)
  • Universidade Federal de Santa Catarina (UFSC)
ISSN: 
  • 1677-3217
  • 1677-3225
Abstract: 
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 25g load for 5 or 10 s, respectively. Student's paired t-test (p<0.05) was used to determine statistically significant differences between group A and B in 7 depths. There were no significant differences between any of the analyzed depths. Since the present experiment showed no significant difference when comparing indentations made with a 25 g load during either 5 or 10 s in different depths, this method can be used with either one of the time intervals tested without compromising a CSMH test on artificially demineralized human enamel.
Issue Date: 
1-Jan-2008
Citation: 
Brazilian Journal of Oral Sciences, v. 7, n. 24, p. 1507-1511, 2008.
Time Duration: 
1507-1511
Keywords: 
  • Dental enamel
  • Hardness tests
  • Tooth demineralization
Source: 
http://www.bibliotecadigital.unicamp.br/document/?code=32643&opt=4
URI: 
Access Rights: 
Acesso aberto
Type: 
outro
Source:
http://repositorio.unesp.br/handle/11449/70280
Appears in Collections:Artigos, TCCs, Teses e Dissertações da Unesp

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