Influence of low-concentrated bleaching agents on the human enamel roughness and morphology

Authors

  • Vanessa Cavalli Universidade de Taubaté
  • César Augusto Galvão Arrais Universidade de Guarulhos
  • Marcelo Giannini Universidade de Campinas, Faculdade de Odontologia de Piracicaba

Abstract

This study examined the surface roughness of enamel before (baseline) and after bleaching; and investigated the influence of different concentrations of carbamide peroxide (CP) on the surface morphology. Sixty flat enamel blocks obtained from human third molars were randomly assigned to 6 groups (n = 10) and submitted to five carbamide peroxide treatments for 14 days: 1) without bleaching treatment (NB-control), 2) 10% CP - Opalescence (O10), 3) 15% CP - Opalescence (O15), 4) 20% CP - Opalescence (O20), 5) 10% CP - Whiteness (W10) and 6) 16% CP - Whiteness (W16). The surface topography was measured by a profilometer and the treated enamel surfaces were examined with a scanning electron microscope (SEM) at x5,000 and x20,000 magnifications. Baseline roughness average was statistically similar for all groups (P > 0.05). All bleaching agents promoted significantly increased surface roughness (P < 0.05). Enamel surface morphologic alterations were observed after bleaching treatment. SEM photographs showed that different concentrations of carbamide peroxide caused enamel surface dissolution, exposing a porous surface.

Author Biographies

Vanessa Cavalli, Universidade de Taubaté

DDS, MSc, PhD

University of Taubaté

César Augusto Galvão Arrais, Universidade de Guarulhos

DDS, MSc, PhD University of Guarulhos

Marcelo Giannini, Universidade de Campinas, Faculdade de Odontologia de Piracicaba

DDS, MSc, PhD

Downloads

Published

2009-11-21

Issue

Vol. 1 No. 1 (2009)

Section

Original research

License

Authors must state:
a) The author(s) of the manuscript above cited, guarantee that all author(s) have revised the final version of the article, and have approved and authorized the publication at Clinics and Research in Dentistry- UNITAU journal.
b) Nor this paper or another substantially similar in contents has already been published or is being published in another printed or electronic journal under his authorship and knowledge.
c) The article above-mentioned is being submitted to Clinics and Research in Dentistry-UNITAU with knowledge and approval of The Institution or Organization of author(s) affiliation.
d) The author(s) also agreed to transfer copyright of their article to Clinics and Research in Dentistry- UNITAU since the date of its submission. In case the publication is not accepted, the transference of copyright will be automatically revoked.
e) All corporative or institutional affiliations and all financial support for the work are properly acknowledged.