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|Type:||Artigo de periódico|
|Title:||Effects of a carbamide peroxide agent and desensitizing dentifrices on enamel microhardness|
|Author:||De Oliveira, R|
|Abstract:||Purpose: To evaluate the in vitro microhardness of enamel treated with a 10% carbamide peroxide agent and two desensitizing dentifrices at different bleaching times. Materials and Methods: A 10% carbamide peroxide bleaching agent was evaluated (Rembrandt 10%) (REM). A placebo agent was used as a control group (PLA). The bleaching and the placebo agents were applied to human enamel dental fragments for 8 hours per day, followed by immersion for 5 minutes in a slurry solution of desensitizing dentifrices: Sensodyne (S) or Sensodyne Fluor (SF). During the remaining time, the enamel fragments were individually stored in 13.5 ml of artificial saliva. Knoop microhardness measurements were performed at baseline, 8 hours, 7, 14, 21, 28, 35 and 42 days of treatment and at 7 and 14 days of a post-treatment period. Results: Analysis of variance and Tukey's test showed no differences in enamel microhardness for REM + SF (P= 0.069) and PLA + SF (P= 0.93) within each time interval. The dental fragments treated with REM + S and PLA + S showed an increase in microhardness values within each time interval (P< 0.0001). There were significant differences among the treatment agents from the 28(th) to the 56(th) day. The use of 10% carbamide peroxide bleaching and a desensitizing dentifrice significantly increased the enamel microhardness values during the bleaching treatment and after 14 days after the completion of the treatment. After the post-treatment period, the enamel fragments treated with a placebo agent and with a 10% carbamide peroxide agent and with a desensitizing fluoride dentifrice maintained the baseline values. (Am J Dent 2003; 16:42-46).|
|Editor:||Mosher & Linder, Inc|
|Appears in Collections:||Unicamp - Artigos e Outros Documentos|
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