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Effect of the type of application tip for 35% hydrogen peroxide on bleaching efficacy and tooth sensitivity: A
Gabrielle G Centenaro1, Michael W Favoreto1, Deisy C F Cordeiro1
1Department of Restorative Dentistry, School of Dentistry, State University of Ponta Grossa, Ponta Grossa, Brazil.
Objectives:
Evaluate the bleaching efficacy (BE) and tooth sensitivity (TS) of in-office bleaching using different application tips.
Methods:
Forty-eight participants were selected (split-mouth), one to receive bleaching with an attached brush tip and one with a conventional tip. The procedure was performed with Whiteness Automixx Plus 35%. The BE was evaluated at the beginning, weekly, one and 12 months post-bleaching with a Vita Easyshade spectrophotometer (ΔE*ab, ΔE00, and WID) and with Vita classical A1-D4 and Vita Bleachedguide shade guides units (ΔSGU). Absolute risk and intensity of TS were recorded using the Visual Analogue Scale. The equivalence of BE was analyzed using the two one-sided t-tests for paired samples. The absolute risk of TS was evaluated using the McNemar test, and the TS intensity was measured with the paired t test (α = 0.05).
Results:
The equivalence of BE was observed for both groups in all color evaluations (p > 0.05). A lower absolute risk and intensity of TS were observed for the attached brush tip when compared with the conventional tip (p < 0.003 and p < 0.0001).
Conclusion:
Using an attached brush tip showed the same BE as a conventional tip. However, for the attached brush tip, there was a reduction in TS.
Clinical Significance:
The applicator-attached brush tip is recommended for in-office dental bleaching, because of the possible reduction in risk and intensity of TS.
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