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Type: Artigo de periódico
Title: Effectiveness Of Dental Bleaching In Depth After Using Different Bleaching Agents
Author: D'Arce M.B.F.
Lima D.A.N.L.
Aguiar F.H.B.
Bertoldo C.E.D.S.
Ambrosano G.M.B.
Lovadino J.R.
Abstract: This study evaluated the effectiveness of low- and high-concentration bleaching agents on enamel and deep dentin. Study design: Stained bovine incisors fragments were randomized placed into 10 groups (n=5), according to the sample thicknesses (2.0 mm or 3.5 mm) and bleaching agent: 10% carbamide peroxide (CP) (4 h a day/21 days); 6% hydrogen peroxide (HP) with calcium (1:30 h a day/21 days); HP 20% with calcium (50 min a day/3 sessions with a 7-day interval); HP 35% (3 x 15 min a day/3 sessions with a 7-day interval); HP 35% with calcium (40 min a day/3 sessions with a 7-day interval). The samples were stored in artificial saliva during the experiment. The color change was evaluated using a spectrophotometer at the initial analysis, after artificially staining with black tea and after each of the bleaching weeks, and data was expressed in CIE Lab System values. The L* coordinate data was submitted to analysis of variance and Tukey-Kramer test and the E values data was submitted for analysis of variance in a split-plot ANOVA and Tukey's test (α=0.05). Results: None of the bleaching agents tested differed from the reflectance values on the enamel surface. For deep dentin HP 20% and HP 35%, both with calcium, showed the lowest reflectance values, which differed from CP 10%. Conclusion: It is concluded that high concentration hydrogen peroxide with calcium was less effective in deep dentin than 10% carbamide peroxide.
Rights: aberto
Identifier DOI: 10.4317/jced.51063
Date Issue: 2013
Appears in Collections:Unicamp - Artigos e Outros Documentos

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