Effect of the type of application tip for 35% hydrogen peroxide on bleaching efficacy and tooth sensitivity: A randomized clinical trial

Gabrielle G Centenaro; Michael W Favoreto; Deisy C F Cordeiro; Fernanda N Gumy; Amanda G Machado; Gabriel D Cochinski; Alessandra Reis; Alessandro D Loguercio

doi:10.1111/jerd.13219

Effect of the type of application tip for 35% hydrogen peroxide on bleaching efficacy and tooth sensitivity: A randomized clinical trial

J Esthet Restor Dent. 2024 Mar 12. doi: 10.1111/jerd.13219. Online ahead of print.

Authors

Gabrielle G Centenaro¹, Michael W Favoreto¹, Deisy C F Cordeiro¹, Fernanda N Gumy¹, Amanda G Machado¹, Gabriel D Cochinski¹, Alessandra Reis¹, Alessandro D Loguercio¹

Affiliation

¹ Department of Restorative Dentistry, School of Dentistry, State University of Ponta Grossa, Ponta Grossa, Brazil.

PMID: 38475979
DOI: 10.1111/jerd.13219

Abstract

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 WI_D ) 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.

Keywords: bleaching gels; dentin sensitivity; hydrogen peroxide; randomized clinical trial; tooth bleaching.

Abstract

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