Effects of Bleaching Agents Combined with Regular and Whitening Toothpastes on Surface Roughness and Mineral Content of Enamel.

Autor:	Attia ML; 1 Department of Restorative Dentistry, University of Taubaté , Taubaté, SP, Brazil ., Cavalli V; 1 Department of Restorative Dentistry, University of Taubaté , Taubaté, SP, Brazil ., do Espírito Santo AM; 2 Department of Mathematical and Earth Sciences, Federal University of São Paulo , Diadema, SP, Brazil ., Martin AA; 3 Research and Development Institute (IP&D), University of Paraiba Valley, São José dos Campos, SP, Brazil ., D'Arce MB; 1 Department of Restorative Dentistry, University of Taubaté , Taubaté, SP, Brazil ., Aguiar FH; 4 Department of Restorative Dentistry, Piracicaba Dental School/ University of Campinas , Piracicaba, SP, Brazil ., Lovadino JR; 4 Department of Restorative Dentistry, Piracicaba Dental School/ University of Campinas , Piracicaba, SP, Brazil ., do Rego MA; 1 Department of Restorative Dentistry, University of Taubaté , Taubaté, SP, Brazil ., Cavalcanti AN; 5 Area of Restorative Dentistry, School of Dentistry, School of Medicine and Public Health of Bahia and School of Dentistry, Federal University of Bahia , Salvador, BA, Brazil ., Liporoni PC; 1 Department of Restorative Dentistry, University of Taubaté , Taubaté, SP, Brazil .; 4 Department of Restorative Dentistry, Piracicaba Dental School/ University of Campinas , Piracicaba, SP, Brazil .
Jazyk:	angličtina
Zdroj:	Photomedicine and laser surgery [Photomed Laser Surg] 2015 Jul; Vol. 33 (7), pp. 378-83.
DOI:	10.1089/pho.2014.3835
Abstrakt:	Objective: The purpose of this study was to evaluate surface roughness and changes in the composition of enamel submitted to different bleaching protocols and toothbrushing with regular and whitening toothpastes. Background Data: Bleaching treatment could promote morphological and chemical changes in enamel surface. Methods: Enamel blocks were randomized into nine groups (n=10) according to the bleaching treatment (no bleaching, control group; 6% hydrogen peroxide, HP; or 10% carbamide peroxide, CP) and toothpaste used (placebo, PL; regular, R; or whitening dentifrice, W). Bleaching was performed according to manufacturers' instructions and all groups were submitted to 30,000 cycles of simulated toothbrushing with toothpaste (PL, R, or W). Mineral content evaluation and enamel roughness were evaluated initially (T1), after bleaching (T2), and after toothbrushing (T3), using an energy-dispersive micro X-ray fluorescence spectrometer and profilometry, respectively. Data were statistically analyzed with two way ANOVA, Tukey, and Dunnett tests (5%). Results: Enamel surface roughness was influenced by bleaching and toothbrushing. Surface roughness increased for the groups that brushed with the placebo dentifrice (CP+PL, HP+PL, C+PL) and for the control group that brushed with whitening dentifrice (C+W). Enamel Ca/P ratio decreased after bleaching, but toothbrushing, regardless of the dentifrice used, did not reduce the enamel mineral content. Conclusions: The bleaching treatment resulted in a decrease of enamel mineral content, but the studied dentifrices did not contribute to surface mineral loss.
Databáze:	MEDLINE
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