Combined Bleaching Technique Versus At-home Bleaching-A Single-blind Randomized Controlled Trial

L Vochikovski; M Rezende; B M Maran; Jsm de Paula; L B Machado; S Kossatz; A D Loguercio; A Reis

doi:10.2341/20-283-C

Combined Bleaching Technique Versus At-home Bleaching-A Single-blind Randomized Controlled Trial

Oper Dent. 2022 May 1;47(3):247-257. doi: 10.2341/20-283-C.

Authors

L Vochikovski¹, M Rezende², B M Maran³, Jsm de Paula⁴, L B Machado⁵, S Kossatz⁶, A D Loguercio⁷, A Reis⁸

Affiliations

¹ Laína Vochikovski, MS, PhD student, Department of Restorative Dentistry, State University of Ponta Grossa, Ponta Grossa, Paraná, Brazil.
² Márcia Rezende, DDS, MS, PhD, Department of Restorative Dentistry, Paulo Picanço School of Dentistry, Fortaleza, Ceará, Brazil.
³ Bianca Medeiros Maran, DDS, MS, PhD, professor, Department of Restorative Dentistry, School of Dentistry, State University of Western Paraná, Cascavel, Paraná, Brazil; Postgraduate Program in Dentistry, School of Dentistry, University of North Paraná, Londrina, Paraná, Brazil.
⁴ Jéssica Samantha Martins de Paula, undergraduate student, State University of Ponta Grossa, Ponta Grossa, Paraná, Brazil.
⁵ Layslle Batista Machado, undergraduate student, State University of Ponta Grossa, Ponta Grossa, Paraná, Brazil.
⁶ Stella Kossatz, DDS, MS, PhD, Department of Restorative Dentistry, State University of Ponta Grossa, Ponta Grossa, Paraná, Brazil.
⁷ *Alessandro D Loguercio, DDS, MS, PhD, Department of Restorative Dentistry, State University of Ponta Grossa, Ponta Grossa, Paraná, Brazil.
⁸ Alessandra Reis, DDS, PhD, Department of Restorative Dentistry, State University of Ponta Grossa, Ponta Grossa, Paraná, Brazil.

PMID: 35653595
DOI: 10.2341/20-283-C

Abstract

Objective: To compare the efficacy, color stability, and tooth sensitivity (TS) of combined bleaching, using a modified protocol with at-home bleaching.

Methods: Eighty participants were randomized into two groups. In the combined group, a desensitizing gel was applied (10 minutes) prior to in-office bleaching (35% hydrogen peroxide (H2O2), 2×15 minute applications) and at-home bleaching (4% H2O2, 2×30 minutes for 21 days) started the next day. In the at-home group, only the at-home bleaching was performed. Color was recorded at the beginning and postbleaching with two scales (VITA Classical and Bleachedguide) and Easyshade spectrophotometer. The TS was recorded daily with a 0-10 visual analogue scale (VAS) and five-point numeric rating scale (NRS).

Results: A 40% lower risk (RR=1.4; 95% CI 1.1-1.9) was observed in the at-home group. Higher color change and intensity of TS [mean difference 2.3 (95% CI 1.3-3.3) in the VAS] was observed in the first week for the combined group. After the end of the protocol, a bleaching degree was detected for both groups, with no significant difference between both groups (p>0.05).

Conclusion: The combined group produced a slightly higher degree of color change than at-home bleaching but with a higher risk and intensity of TS.

Publication types

Randomized Controlled Trial

MeSH terms

Dentin Sensitivity*
Humans
Hydrogen Peroxide / therapeutic use
Single-Blind Method
Tooth Bleaching Agents* / therapeutic use
Tooth Bleaching* / methods
Treatment Outcome

Substances

Tooth Bleaching Agents
Hydrogen Peroxide