Dental bleaching with and without LED/Laser association: a split-mouth controlled study

André Manoel Lima Da Fonseca,Fábio Vidal,Fábio Ramôa Pires,Inger Campos Tuñas,Lucio Souza Gonçalves

doi:10.18363/rbo.v73n4.p.267

André Manoel Lima Da Fonseca, Fábio Vidal + Show 3 more

Open Access

https://doi.org/10.18363/rbo.v73n4.p.267

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Abstract

Objective: The aim of this study was to compare dental color changes after a one-session tooth bleaching procedure using 35% hydrogen peroxide with and without hybrid light (LED/diode laser) activation. Material and Methods: 20 volunteers were included in a split-mouth controlled clinical trial. A 35% hydrogen peroxide gel was applied directly on the buccal surface and adjacent areas of all upper anterior teeth. The six teeth were divided into two groups: the upper right incisors and canine were submitted to the tooth bleaching with the gel and the hybrid light (LED/diode laser) while the left incisors and canine were submitted to tooth bleaching with only the gel. Dental color was measured with a visual color scale and a spectrophotometer at five different moments: initial appointment, immediately after prophylaxis, and 14, 30 and 180 days after bleaching. Results: The comparison between the results of both treatments (with and without LED/laser) did not show any statistically significant differences (p > 0.05; Wilcoxon’s test) neither for objective (spectrophotometer) nor for subjective evaluations (visual color scale). Conclusion: The results of the present study showed that there are no differences in dental color changes between dental bleaching with gel and LED/Laser activation and dental bleaching with only gel.

Highlights

A lthough the use of light sources to enhance the effects of tooth bleaching has been suggested over the years, there is no consensus on its effectiveness.[1]
When it comes to bleaching and color stability, recent evidence has shown that light activation produces results similar to those obtained with only chemical activation, regardless of the bleaching protocol tested.[2,3,4,5]
Inclusion criteria were: absence of caries, dental fillings, dentin hypersensitivity, cervical lesions, clinically visible periodontal disease and periradicular lesions on the teeth involved in the study; VPI and GBI values lower than 25%; absence of heavy discoloration on the studied teeth, such as those associated with exogenous substances; without submission to any other dental bleaching protocol in the previous 2 years and absence of any previous history of allergic reactions related to substances used in tooth bleaching

Summary

Introduction

A lthough the use of light sources to enhance the effects of tooth bleaching has been suggested over the years, there is no consensus on its effectiveness.[1]. Dental bleaching studies is commonly performed using split-mouth design, which divide the mouth within a patient.[14,15,16] This study design was introduced by Ramfjord et al.[17] evaluated the efficacy of two periodontal procedure randomly allocating the methods in half of each patient’s dentition. Randomized controlled trials have as the unit of randomization the individual. The split-mouth trials utilize body parts as the unit of randomization, such as the hemi-arch of each patient. Split mouth design has as main advantage the patients act as their own controls, excluding inter-subject variability.[18]

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Conclusion