Efficacy of Tooth Bleaching With 35% and 6% Hydrogen Peroxide in Primary Dentition

Summary

The aesthetics of dental elements generates great psychological and social impacts, both in the deciduous and permanent dentition. One of the techniques widely used to visually improve the appearance of teeth is bleaching. Bleaching can be performed both at home and in a dental office. In office whitening, the technique used consists of applying the whitening gel to the dental surfaces in concentrations ranging from 25% to 50% of hydrogen peroxide. However, recent studies show that low and medium concentration bleaching agents based on hydrogen peroxide have been effective and present a lower risk of sensitivity to the patient. In view of the above, this study aims to carry out a controlled and randomized clinical trial to compare the effectiveness of dental bleaching in deciduous teeth with hydrogen peroxide at concentrations of 35% and 6%. For this, 38 patients aged 03 to 06 years will be selected, allocated in 2 groups (G1 - Hydrogen Peroxide 35%, n=19 and G2- Hydrogen Peroxide 6%, n=19). Bleaching will be carried out in up to three sessions, with an interval of 7 days between them and the evaluation of color and tooth sensitivity will be carried out 48 hours after each bleaching session. The color assessment will be measured using a digital spectrometer and tooth sensitivity using the Pain Level Scale (Wong-Baker Faces®). Descriptive statistical analysis will be carried out, containing the mean and standard deviation in the calculation and normality and homogeneity tests will be carried out, for subsequent adequate statistical analysis. As a result, it is expected that there is no significant difference between the groups in terms of color variation and that the low-concentration bleaching group has the lowest sensitivity index.

Conditions

• Sensitivity, Tooth

Interventions

PROCEDURE

Tooth Bleaching with Whiteness HP Automixx 35%

* Clinical examination and taking the initial shade of the tooth with Vita Easyshade®; * Sensitivity/pain recording using the Pain Level Scale (Wong-Baker Faces®); * Prophylaxis with a Robson brush and prophylactic paste; * Application of lip balm on the patient's lips; * Placement of the labial retractor; * Application of the gingival barrier; * Application of Whiteness HP Automixx 35% whitening gel; * In the session, a single application of the gel will be carried out and where it will remain on the surface of the tooth for 15 min; * The gel must be removed from the teeth with a sucker and the teeth cleaned with gauze; * Sensitivity/pain recording using the Pain Level Scale (Wong-Baker Faces®); * The second bleaching session will be carried out 7 days after the first one and, if necessary, a third session can be carried out 7 days after the second one.

PROCEDURE

Tooth Bleaching with Whiteness HP Automixx 6%

* Clinical examination and taking the initial shade of the tooth with Vita Easyshade®; * Sensitivity/pain recording using the Pain Level Scale (Wong-Baker Faces®); * Prophylaxis with a Robson brush and prophylactic paste; * Application of lip balm on the patient's lips; * Placement of the labial retractor; * Application of the gingival barrier; * Application of Whiteness HP Automixx 6% whitening gel; * In the session, a single application of the gel will be carried out and where it will remain on the surface of the tooth for 15 min; * The gel must be removed from the teeth with a sucker and the teeth cleaned with gauze; * Sensitivity/pain recording using the Pain Level Scale (Wong-Baker Faces®); * The second bleaching session will be carried out 7 days after the first one and, if necessary, a third session can be carried out 7 days after the second one.

Sponsors & Collaborators

• University of Nove de Julho

  lead OTHER

Study Design

Allocation

RANDOMIZED

Purpose

TREATMENT

Masking

NONE

Model

PARALLEL

Eligibility

Min Age

3 Years

Max Age

6 Years

Sex

ALL

Healthy Volunteers

Yes

Timeline & Regulatory

Start

2025-03-01

Primary Completion

2025-08-20

Completion

2026-03-20