High-concentrated carbamide peroxide bleaching agents effects on enamel surface.
Concern has been expressed regarding the adverse effects of peroxide-containing tooth bleaching agents on enamel surface. This study examined enamel average surface roughness before (baseline) and after an in-office bleaching protocol and investigated the influence of high concentrations of carbamide peroxide gels on its surface staining and morphology. Flat enamel surfaces were submitted to 35 and 37% carbamide peroxide or to no bleaching treatment (n = 10) and evaluated with a profilometer. Eight specimens from each group were randomly selected and immersed in a 2% methylene blue solution. Afterwards, specimens were ground into powder and prepared for the spectrophotometric analysis. Two remained specimens of each group were examined using a scanning electron microscope. Data were subjected to analysis of variance and Tukey test (P > 0.05). Baseline roughness average was statistically similar for all groups, however, 35% carbamide peroxide produced the roughest enamel surfaces. Different concentrations of carbamide peroxide produced similar staining means and enamel surface morphological alterations.
Cavalli
V
V
Department of Restorative Dentistry, University of Campinas, Piracicaba School of Dentistry, Piracicaba, Brazil.
Arrais
C A G
CA
Giannini
M
M
Ambrosano
G M B
GM
D000077463:Carbamide Peroxide; D003743:Dental Enamel / Q000187:drug effects*; D004338:Drug Combinations; D005782:Gels; D006801:Humans; D008751:Methylene Blue; D008963:Molar; D010545:Peroxides / Q000009:adverse effects*; D013499:Surface Properties; D014073:Tooth Bleaching / Q000379:methods*; D014508:Urea / Q000009:adverse effects* / Q000031:analogs & derivatives*
D004338:Drug Combinations; D005782:Gels; D010545:Peroxides; D000077463:Carbamide Peroxide; D014508:Urea; D008751:Methylene Blue