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In vitro evaluation of the microhardness of bovine enamel exposed to acid solutions after bleaching
Zanet, Caio Gorgulho; Fava, Marcelo; Alves, Levy Anderson César.
  • Zanet, Caio Gorgulho; Ibirapuera University. College of Dentistry. Department of Prosthodontics and Integrated Clinics. São Paulo. BR
  • Fava, Marcelo; State University of São Paulo. School of Dentistry of São José dos Campos. Department of Orthodontics and Pediatric Dentistry. São José dos Campos. BR
  • Alves, Levy Anderson César; State University of São Paulo. School of Dentistry of São José dos Campos. Department of Orthodontics and Pediatric Dentistry. São José dos Campos. BR
Braz. oral res ; 25(6): 562-567, Nov.-Dec. 2011. tab
Article in English | LILACS | ID: lil-608027
ABSTRACT
Acid erosion is a superficial loss of enamel caused by chemical processes that do not involve bacteria. Intrinsic and extrinsic factors, such as the presence of acid substances in the oral cavity, may cause a pH reduction, thus potentially increasing acid erosion. The aim of this study was to evaluate the microhardness of bleached and unbleached bovine enamel after immersion in a soda beverage, artificial powder juice and hydrochloric acid. The results obtained for the variables of exposure time, acid solution and substrate condition (bleached or unbleached enamel) were statistically analyzed by the ANOVA and Tukey tests. It was concluded that a decrease in microhardness renders dental structures more susceptible to erosion and mineral loss, and that teeth left unbleached show higher values of microhardness compared to bleached teeth.
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Full text: Available Index: LILACS (Americas) Main subject: Tooth Bleaching / Acids / Dental Enamel / Hardness / Hydrogen Peroxide Type of study: Evaluation studies Limits: Animals Language: English Journal: Braz. oral res Journal subject: Dentistry Year: 2011 Type: Article Affiliation country: Brazil Institution/Affiliation country: Ibirapuera University/BR / State University of São Paulo/BR

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Full text: Available Index: LILACS (Americas) Main subject: Tooth Bleaching / Acids / Dental Enamel / Hardness / Hydrogen Peroxide Type of study: Evaluation studies Limits: Animals Language: English Journal: Braz. oral res Journal subject: Dentistry Year: 2011 Type: Article Affiliation country: Brazil Institution/Affiliation country: Ibirapuera University/BR / State University of São Paulo/BR