Association effect of in-office and nightguard vital bleaching on dental enamel microhardness

Authors

  • J.A. Rodrigues State University of Campinas (UNICAMP)
  • Maria Carolina Guilherme Erhardt State University of Campinas (UNICAMP)
  • Giselle Maria Marchi State University of Campinas (UNICAMP)
  • L.A.F. Pimenta State University of Campinas (UNICAMP)
  • Gláucia Maria Bovi Ambrosano State University of Campinas (UNICAMP)

DOI:

https://doi.org/10.20396/bjos.v2i7.8641721

Keywords:

Enamel. Microhardness. Carbamide peroxide. Nightguard vital beaching. In-office bleaching

Abstract

The aim of this study was to evaluate “in vitro” the microhardness of dental enamel subjected to in-office and nightguard vital bleaching agents: 37% carbamide peroxide-CP37 (Whiteness Super-FGM) and 10% carbamide peroxide-CP10 (Whiteness Perfect-FGM). Enamel fragments measuring 3 x 3mm (n=18) were embedded in polystyrene resin and polished. They were treated 1h once a week with the CP37 and 8h every day with CP10 for 21 days. The remainder of the time they were stored in remineralization solution. Microhardness measurements were completed with a Knoop diamond in a microhardness tester with 50g static load prior to the exposure to bleaching agents and 7, 14, 21, 28, and 35 days after that Split Plot ANOVA followed by Tukey’s test were performed. The test showed no significant differences in the enamel microhardness before, during, or after bleaching treatment. Conclusions: It can be concluded that the combination of in-office and nightguard vital bleaching agents do not alter the enamel microhardness “in vitro”

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Author Biographies

Maria Carolina Guilherme Erhardt, State University of Campinas (UNICAMP)

Dr. Erhardt has graduated in Dentistry at Universidade Estadual de Campinas - Brazil (1999), got her Master's degree in Dental Clinics - Operative Dentistry at Universidade Estadual de Campinas - Brazil (2003) and her PHd in Dental Clinics - Operative Dentistry at Universidade Estadual de Campinas (2005). Afterwards, was a Postdoctoral fellow at the Universidad de Granada - Spain (2008), focusing her researches in biomaterials in dentistry. Has experience in Dentistry, acting on the following subjects: dentin, bond strength, dental adhesives, microtensile test and microscopic evaluations.

Giselle Maria Marchi, State University of Campinas (UNICAMP)

Possui graduação em Odontologia pela Universidade Estadual de Campinas(1993), mestrado em Clínica Odontológica pela Universidade Estadual de Campinas(1997) e doutorado em Clínica Odontológica pela Universidade Estadual de Campinas(1998).

Gláucia Maria Bovi Ambrosano, State University of Campinas (UNICAMP)

Possui graduação em Engenharia Agronômica pela Universidade de São Paulo (1983), mestrado em Ciências pela Universidade de São Paulo (1987) e doutorado em Ciências pela Universidade de São Paulo (1994).

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Published

2015-11-12

How to Cite

1.
Rodrigues J, Erhardt MCG, Marchi GM, Pimenta L, Ambrosano GMB. Association effect of in-office and nightguard vital bleaching on dental enamel microhardness. Braz. J. Oral Sci. [Internet]. 2015 Nov. 12 [cited 2022 Sep. 30];2(7):365-9. Available from: https://periodicos.sbu.unicamp.br/ojs/index.php/bjos/article/view/8641721

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