A Single-Blind Randomized Trial About the Effect of Hydrogen Peroxide Concentration on Light-Activated Bleaching

Mena-Serrano, Alexandra; García, E.; Luque-Martínez, Issis; Grande, Rosa Helena Miranda; Loguércio, AD; Reis, Alessandra

doi:10.2341/15-077-c

Cited by 54 publications

(50 citation statements)

References 56 publications

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“…Thus, it is expected that a lower concentration of peroxide will reach the dentin than that applied over the enamel. 22 Considering that the bleaching effect is related to peroxide concentration, 23,24 it is reasonable to believe that a reduced color alteration could be observed for the dentin in this situation than that found the present study.…”

Section: Discussionsupporting

confidence: 47%

Impact of 35% Hydrogen Peroxide on Color and Translucency Changes in Enamel and Dentin

et al. 2018

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This study evaluated the effects of tooth bleaching with high-concentration of hydrogen peroxide on alterations of translucency parameter (TP) and color of dentin and enamel. The crown of five human molars was sectioned into four slices parallel to buccal surface. The dentin of external slices containing buccal/ lingual enamel was fully removed with diamond bur; while these slices were used to assess alterations on enamel. Alterations on dentin were assessed into the center of internal slices. The color of specimens was measured over white and black backgrounds using a spectrophotometer (CieL*a*b) at baseline, allowing to calculate the TP by difference between the color measured over each background. Specimens were submitted to three 15-min applications of 35% hydrogen peroxide followed by their storage in water for one-week. Afterwards, the color measurements were repeated at both backgrounds. Color (∆L, ∆a, ∆b and ∆E) and translucency (∆TP) changes were calculated and data individually analyzed by T-test (α = 0.05). Influence of hard tissue and assessment time on each color parameter was also analyzed by 2-way repeated measure ANOVA (α = 0.05). Tooth bleaching resulted in increased lightness for the enamel, whereas no alteration on this parameter occurred for dentin. No difference between the tooth hard tissues was observed regards the other color parameters and ∆E. A slightly reduction on TP was observed only for the enamel. In conclusion, 35% hydrogen peroxide caused similar color and translucency changes on dentin and enamel.

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Section: Discussionsupporting

confidence: 47%

Impact of 35% Hydrogen Peroxide on Color and Translucency Changes in Enamel and Dentin

et al. 2018

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“…It is worth mentioning that this study associated objective and subjective methods of color assessment. Although the common sense that, spectrophotometer gives more accurate results, 24 this instrument is yet not currently used in clinical practice. On the other hand, shade guide units are the most used tools for color evaluation in the clinicians' armamentarium.…”

Section: Discussionmentioning

confidence: 99%

“…The primary outcome of this study was color changes in the participants' teeth, which were evaluated with a spectrophotometer (Vita Easyshade, Vident, Brea, CA, USA). Previous studies [24][25][26] have reported that 2 bleaching sessions with the product Whiteness 35% HP Maxx, a predecessor of Whiteness HP Automixx 35 (FGM Dental Products, Joinville, SC, Brazil), produced a whitening effect of about 8 (ΔE). To detect a difference of 3.5 (ΔE), which is clinically perceptible when comparing pairs of teeth per study group, with a power of 80% and an alpha of 5%, a minimum sample size of 22 patients per group was required.…”

Section: Sample Size Calculationmentioning

confidence: 99%

<p>Effects of Exposure to Cola-Based Soft Drink on Bleaching Effectiveness and Tooth Sensitivity of In-Office Bleaching: A Blind Clinical Trial</p>

Hass¹,

Carvalhal

Lima

et al. 2019

CCIDE

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The purpose of this single-blind (evaluators) and parallel design study was to evaluate whether exposure to a cola-based soft drink during bleaching treatment with 35% hydrogen peroxide (HP) affects color change and bleaching-induced tooth sensitivity. Material and methods: Forty-four patients with central incisors darker than A2 were selected. Participants who did not drink cola-based soft drinks were assigned to the control group (CG), while participants who drank a cola-based soft drink at least twice a day were assigned to the experimental group (EG). For the CG, foods with staining dyes were restricted. For the EG, there was no restriction on food and patients were asked to rinse their mouths with a cola-based soft drink for 30 s, 4 times daily. For both groups, 2 sessions with three 15 min applications of 35% HP were performed. Shade evaluation was assessed via subjective (VITA classical and VITA bleacheguide shade guides) and objective methods (Easyshade spectrophotometer) at baseline, during bleaching (first, second, and third weeks), and post bleaching (1 week and 1 month). Patients recorded their sensitivity perceptions using a numerical rating scale and 0-10 visual analog scales. Variation in shade guide units and the 2 colors (DE) were evaluated with a Student's t-test (α = 0.05) and Mann-Whitney test (α = 0.05). Absolute risk of tooth sensitivity and intensity of tooth sensitivity were evaluated by a Chi-square test (α=0.05). Results: Effective bleaching was observed for both groups after 30 days, without statistical difference (p > 0.08). There was no significant difference in absolute risk of bleachinginduced tooth sensitivity between the 2 groups (p = 0.74). Higher and significant scores in pain scales were detected for the EG in comparison to the CG (p < 0.05). Conclusion: Even that the cola-based soft drink exposure during in-office bleaching treatments did not affect the bleaching's effectiveness; patients reported a higher intensity in bleaching-induced tooth sensitivity.

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“…6,25 However, there are still several questions about the real effectiveness of these auxiliary methods, including light/heat sources (such as LED or laser). [1][2][3]5,7,11,20,26 The lack of consensus in the literature about the most effective wave length and the controversies about the heating produced by high potency lasers and LEDs, confirm the need for more studies about the effects of light sources. 13 Recently published experimental studies (in vitro and clinical studies) have shown that there does not seems to be any statistically significant advantages in using light sources when it comes to bleaching effectiveness.…”

Section: Discussionmentioning

confidence: 99%

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

Fonseca

Tuñas

Vidal

et al. 2016

Rev. Bras. Odontol.

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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.

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A Single-Blind Randomized Trial About the Effect of Hydrogen Peroxide Concentration on Light-Activated Bleaching

Abstract: According to the value-oriented shade guide, the use of LED/laser light activation was able to increase the degree of whitening of the 20% HP group, but this association was not useful for the 35% HP gel. The spectrophotometer, however, did not detect significant differences among groups.

Cited by 54 publications

References 56 publications

Impact of 35% Hydrogen Peroxide on Color and Translucency Changes in Enamel and Dentin

Impact of 35% Hydrogen Peroxide on Color and Translucency Changes in Enamel and Dentin

<p>Effects of Exposure to Cola-Based Soft Drink on Bleaching Effectiveness and Tooth Sensitivity of In-Office Bleaching: A Blind Clinical Trial</p>

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

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