Clinical evaluation of in-office bleaching using a Violet LED (405-410 nm)

Author(s)

Eric Mayer dos Santos

• Document type: Doctoral Thesis
• Press: São Paulo.
• Institution: Universidade de São Paulo (USP). Faculdade de Odontologia (FO/SDO)
• Defense date: 2020-02-03

Examining board members

Patricia Moreira de Freitas Costa e Silva; Marcelo Giannini; Karen Müller Ramalho; Miriam Lacalle Turbino

• Advisor: Patricia Moreira de Freitas Costa e Silva

Abstract

The aim of this clinical study was to evaluate the effect of whitening treatment performed with violet LED light (405-410 nm), associated or not with a whitening gel, on tooth color change, dental sensitivity, participants\' satisfaction with the technique and impact on quality of life. Sixty participants were selected and randomly divided into one of the treatment groups (n = 15): G1 - 35% hydrogen peroxide bleaching gel (4 sessions, 1 session / week); G2 - violet LED (405-410 nm, 4 sessions, 1 session / week); G3 - violet LED (405-410 nm, 4 sessions, 2 sessions / week); G4 - hybrid technique (violet LED + 35% PH + violet LED) (4 sessions, 1 session / week). Color evaluation was performed before and immediately after treatment, 14 days after whitening completion and 3 months after whitening completion, and assessed by colorimetric tests (objective and subjective). Additionally, dental sensitivity was evaluated during and 48 hours after tooth whitening, satisfaction with treatment and impact on quality of life (OHIP-14 questionnaire). The data obtained, except for the satisfaction questionnaire (descriptive evaluation), were submitted to statistical analysis, considering a significance level of 5%. During the different moments of the evaluation, the color variation was similar in groups G1 and G4, and not significant in groups G2 and G3, both in subjective and objective evaluations. In the sensitivity evaluation G2 and G3 did not present significant values while G4 and G1 presented, being G4 smaller than G1. In the evaluation of quality of life only G1 showed significant improvement. Among the evaluated techniques G4 presented the best results comparing colorimetric results and sensitivity. (AU)

• FAPESP's process: 16/24126-1 - long-therm clinical evaluation of in-office dental bleaching using a violet light (led 405-410 nm)
• Grantee: Eric Mayer dos Santos
• Support Opportunities: Scholarships in Brazil - Doctorate