Hydrogen peroxide toothpaste: Whitening action?

  • Ana Rita Sokolonski Antón
  • Max José Pimenta Lima
  • Roberto Paulo Correia de Araújo Universidade Federal da Bahia
Keywords: Dental bleaching, dentifrices, demineralization

Abstract

Purpose: To assess in vitro the degree of whitening and demineralization in human enamel after treatment with whitening toothpastes. Methods: Darkened premolars were brushed with toothpastes containing H2O2 or NaHCO3 for 28 days. The efficacy of the whitening substances was assessed in comparison with the action of carbamide peroxide (CP) gel. Whitening was determined by using a spectrophotometer (CIELab System) and the demineralization was assessed by means of diode laser. Results: After 28 days of brushing with a toothpaste containing H2O2 there was an increase in brightness and a reduction in the parameter a*; after 14 days of gel application, pigmentation elimination was obtained. The mean ΔE values for the negative control group, group treated with CP gel, and groups treated with toothpastes containing H2O2 or NaHCO3 were: 26.27±8.66; 6.82±3.89; 16.78±6.22; and 29.21±5.07. The initial demineralization was low. Demineralization increased after pigmentation except for the group that had been treated with CP gel. Conclusion: Toothbushing with H2O2 toothpaste reduced enamel demineralization, increased the L* parameter, and reduced the a*parameter after 28 days. The toothpaste containing NaHCO3 abrasive did not have any whitening effect nor inhibit demineralization.

Author Biographies

Ana Rita Sokolonski Antón
Graduada em odontologia pela UFBA, mestre em odontologia pela UFBA, cirurgiã-dentista da aeronáutica, prof. de bioquímica da faculdade Dom Pedro II
Max José Pimenta Lima
Graduado em odontologia pela UFBA, Mestre em Odontologia pela UFBA, Professor assistenta da UCSal, Professor assistente da FBDC.
Roberto Paulo Correia de Araújo, Universidade Federal da Bahia
Professor Associado da Universidade Federal da Bahia Professor Titular da Universidade Católica do Salvador Editor Científico da Revista de Ciências Médicas e Biológicas. ISSN 1677-5090
Published
2009-02-11
Section
Original Article