In Vitro Evaluation of the Efficacy of Two Different At-home Bleaching Agents: Solo or Combined

Hussain Abd-alla, Manal; Ahmed Abdullah, Huda

	In Vitro Evaluation of the Efficacy of Two Different At-home Bleaching Agents: Solo or Combined
Diyala Journal of Medicine
Article 1, Volume 10, Issue 2, 2016, Pages 55-62
Authors
Manal Hussain Abd-alla; Huda Ahmed Abdullah
Abstract
Background: Combining at-home and in-office vital teeth bleaching techniques has proven to be effective; however, the efficacy of combining at-home bleaching agents is still unclear. Objective: To compare the effectiveness of 10% and 35% carbamide peroxide at-home bleaching agents solo or in combination. Materials and Methods: Forty enamel samples from human premolars were divided into four groups (n=10) to receive different at-home bleaching protocols. The samples were bleached for two weeks as follow: G1 bleached with 10%CP for 8h/day; G2 bleached with 35%CP for 30 minutes/day; G3 starting with 35%CP for three days and continue with 10%CP for the last 11 days; and G4 bleached with 10%CP for the first 11 days and with 35%CP for the last three days. Teeth color measurements were recorded by a colorimeter in reference to the CIE Lab* at different periods. Student's t-test was used to compare between the groups at each measuring period. Results: No significant differences were seen among the four groups neither in ΔE1& ΔE2 nor in ΔE*6 (p>0.05). Conclusion: Both 10% and 35%CP, used for two weeks, were effective in teeth whitening. Compared with 10% CP, combination treatments whether starting with 35% CP or ending with it produced no significant difference in teeth whitening during the treatment or one month post operatively.
Keywords
combination; carbamide peroxide; home bleaching agents; colorimeter

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