Inconclusive evidence about the comparative effectiveness of a low concentration hydrogen peroxide bleaching agent catalyzed by titanium dioxide nanoparticles with a high concentration peroxide control

2017 ◽  
Vol 148 (11) ◽  
pp. e184
Author(s):  
Tahira Devji
Keyword(s):  
Hydrogen Peroxide ◽  
Titanium Dioxide ◽  
Comparative Effectiveness ◽  
Titanium Dioxide Nanoparticles ◽  
Bleaching Agent ◽  
High Concentration ◽  
Low Concentration ◽  
Peroxide Bleaching

scholarly journals Changes in Bovine Enamel after Treatment with a 30% Hydrogen Peroxide Bleaching Agent

2004 ◽  
Vol 23 (4) ◽  
pp. 517-521 ◽  
Author(s):  
Hyun-Jin PARK ◽  
Tae-Yub KWON ◽  
Soon-Hyun NAM ◽  
Hyun-Jung KIM ◽  
Kyo-Han KIM ◽  
...  
Keyword(s):  
Hydrogen Peroxide ◽  
Bleaching Agent ◽  
Peroxide Bleaching ◽  
Bovine Enamel

scholarly journals Indirect cytotoxicity of a 35% hydrogen peroxide bleaching gel on cultured odontoblast-like cells

2009 ◽  
Vol 20 (4) ◽  
pp. 267-274 ◽  
Author(s):  
Cármen Regina Coldebella ◽  
Ana Paula Dias Ribeiro ◽  
Nancy Tomoko Sacono ◽  
Flávia Zardo Trindade ◽  
Josimeri Hebling ◽  
...  
Keyword(s):  
Hydrogen Peroxide ◽  
Cell Morphology ◽  
Total Protein ◽  
Cell Metabolism ◽  
Control Group ◽  
Bleaching Agent ◽  
Morphological Alterations ◽  
Peroxide Bleaching ◽  
Cytopathic Effects ◽  
Halogen Light

The aim of this study was to evaluate the trans-enamel and trans-dentinal effects of a 35% hydrogen peroxide (H2O2) bleaching gel on odontoblast-like cells. Enamel/dentin discs obtained from bovine incisors were mounted in artificial pulp chambers (APCs). Three groups were formed: G1- 35% H2O2; G2- 35% H2O2 + halogen light application; G3- control. The treatments were repeated 5 times and the APCs were incubated for 12 h. Then, the extract was collected and applied for 24 h on the cells. Cell metabolism, total protein dosage and cell morphology were evaluated. Cell metabolism decreased by 62.09% and 61.83% in G1 and G2, respectively. The depression of cell metabolism was statistically significant when G1 and G2 were compared to G3. Total protein dosage decreased by 93.13% and 91.80% in G1 and G2, respectively. The cells in G1 and G2 exhibited significant morphological alterations after contact with the extracts. Regardless of halogen light application, the extracts caused significantly more intense cytopathic effects compared to the control group. After 5 consecutive applications of a 35% H2O2 bleaching agent, either catalyzed or not by halogen light, products of gel degradation were capable to diffuse through enamel and dentin causing toxic effects to the cells.

scholarly journals The change of teeth color, whiteness variations and its psychosocial and self-perception effects when using low vs. high concentration bleaching gels: a one-year follow-up.

2020 ◽  
Author(s):  
Juan Estay ◽  
Pablo Angel ◽  
Cristian Bersezio ◽  
Mateus Tonetto R ◽  
Gilbert Jorquera ◽  
...  
Keyword(s):  
Hydrogen Peroxide ◽  
Health Impact ◽  
Psychosocial Impact ◽  
Tooth Bleaching ◽  
Self Perception ◽  
High Concentration ◽  
Low Concentration ◽  
Positive Effects ◽  
One Year

Abstract Background: Dental bleaching in traditional concentrations generates greater sensitivity. In this respect, new systems of lower concentration of hydrogen peroxide for tooth bleaching appeared, with color stability unknown over time. The aim of this study was to compare the change and stability of color with low-concentration (6%) hydrogen peroxide gel in an in-office bleaching setting relative to conventional 37.5% gel, including their effects on psychosocial and esthetic self-perception, after one year.Methods: Patients (n=25) were assessed at 12 months post bleaching treatment (whitening with 6% chemo-activated alkaline formula gel versus 37.5% traditional concentration gel). Color changes were measured objectively using total variation in color (ΔE), and subjectively using Vita Classical and Vita Bleached scale (ΔSGU) by calibrated evaluators (Kappa=0.85). The Psychosocial Impact of Dental Aesthetics Questionnaire (PIDAQ) and Oral Health Impact Profile (OHIP-14) aesthetic questionnaires were used to measure the self-perception and the psychosocial impact of the bleaching protocols.Results: The effect (ΔE) of 37.5% HP (8.37 ± 2.73) was significantly better than that of 6% HP (5.27 ± 2.53) in terms of color rebound after one year of follow-up. There were significant differences in psychosocial impact and esthetic self-perception measurements prior to bleaching versus one-year post-whitening time points; positive effects were maintained.Conclusions: Low concentration (6%) achieved effective bleaching with good stability after one year, accompanied by a positive psychosocial impact and enhanced self-perception at follow-up.Trial registration: NCT03217994 (before enrollment of the first participant). Data register: July 14, 2017

scholarly journals The change of color by whiteness indexes and its psychosocial and self-perception effects when using low vs. high concentration whitening gels: a one-year follow-up.

2020 ◽  
Author(s):  
Juan Estay ◽  
Pablo Angel ◽  
Cristian Bersezio ◽  
Manuel Peña ◽  
Eduardo Fernandéz
Keyword(s):  
Hydrogen Peroxide ◽  
Health Impact ◽  
Psychosocial Impact ◽  
Tooth Bleaching ◽  
Self Perception ◽  
High Concentration ◽  
Low Concentration ◽  
Positive Effects ◽  
One Year

Abstract Background: Dental bleaching in traditional concentrations generates greater sensitivity. In this respect, new systems of lower concentration of hydrogen peroxide for tooth bleaching appeared, with color stability unknown over time. The aim of this study was to compare the change and stability of color with low-concentration (6%) hydrogen peroxide gel in an in-office bleaching setting relative to conventional 37.5% gel, including their effects on psychosocial and esthetic self-perception, after one year. Methods: Patients (n=25) were assessed at 12 months post bleaching treatment (whitening with 6% chemo-activated alkaline formula gel versus 37.5% traditional concentration gel). Color changes were measured objectively using total variation in color (ΔE), and subjectively using Vita Classical and Vita Bleached scale (ΔSGU) by calibrated evaluators (Kappa=0.85). The Psychosocial Impact of Dental Aesthetics Questionnaire (PIDAQ) and Oral Health Impact Profile (OHIP-14) aesthetic questionnaires were used to measure the self-perception and the psychosocial impact of the bleaching protocols. Results: The effect (ΔE) of 37.5% HP (8.37 ± 2.73) was significantly better than that of 6% HP (5.27 ± 2.53) in terms of color rebound after one year of follow-up. There were significant differences in psychosocial impact and esthetic self-perception measurements prior to bleaching versus one-year post-whitening time points; positive effects were maintained. Conclusions: Low concentration (6%) achieved effective bleaching with good stability after one year, accompanied by a positive psychosocial impact and enhanced self-perception at follow-up. Trial registration: NCT03217994 Keywords: Bleaching, Randomized clinical trial, Low concentration, OHIP-14 , PIDAQ

scholarly journals Fracture resistance of endodontically-treated teeth submitted to bleaching treatment with hydrogen peroxide and titanium dioxide nanoparticles photoactivated by LED-laser

2014 ◽  
Vol 43 (3) ◽  
pp. 153-157
Author(s):  
Keren Cristina JORDÃO-BASSO ◽  
Carolina ANDOLFATTO ◽  
Milton Carlos KUGA ◽  
Gisselle Moraima CHÁVEZ-ANDRADE ◽  
Norberto Batista de FARIA-JÚNIOR ◽  
...  
Keyword(s):  
Hydrogen Peroxide ◽  
Titanium Dioxide ◽  
Fracture Resistance ◽  
Titanium Dioxide Nanoparticles ◽  
Testing Machine ◽  
Compressive Load ◽  
Sodium Perborate ◽  
Pulp Chamber ◽  
Endodontically Treated Teeth ◽  
Bleaching Treatment

Objective: The aim of this study was evaluate the fracture resistance of endodontically-treated teeth after bleaching treatment using 15% hydrogen peroxide plus titanium dioxide nanoparticles (15HPTiO2) photoactivated by LED-laser, in comparison with protocols using 35% hydrogen peroxide (35HP), 37% carbamide peroxide (37CP) or sodium perborate (SP). Material and method: After endodontic treatment, fifty bovine extracted incisors were divided into five groups (n = 10): G1- without bleaching; G2- 35HP; G3- 37CP; G4- 15HPTiO2 photoactivated by LED-laser and G5- SP. In G2 and G4, the bleaching protocol was applied in 4 sessions, with a 7 day interval between each session. In G3 and G5, the materials were kept in the pulp chamber for 21 days, but replaced every 7 days. After 21 days, the crowns were subjected to compressive load at a cross head speed of 0.5 mm/min, applied at 135° to the long axis of the root using an eletromechanical testing machine, until fracture. The data were submitted to ANOVA and Tukey tests (p = 0.05). Result: The bleaching treatment in endodontically-treated teeth with 15HP plus TiO2 nanoparticles and photoactivated by LED-laser caused reduction of the fracture resistance similarly provided by 35HP, 37CP or SP (p>0.05). All bleaching treatments reduced the fracture resistance compared to unbleached teeth (p<0.05). Conclusion: All bleaching protocols reduced the fracture resistance of endodontically-treated teeth, but there were no differences between each other.

scholarly journals The change of teeth color, whiteness variations and its psychosocial and self-perception effects when using low vs. high concentration bleaching gels: a one-year follow-up

2020 ◽  
Vol 20 (1) ◽  
Author(s):  
J. Estay ◽  
P. Angel ◽  
C. Bersezio ◽  
M. Tonetto ◽  
G. Jorquera ◽  
...  
Keyword(s):  
Hydrogen Peroxide ◽  
Health Impact ◽  
Psychosocial Impact ◽  
Tooth Bleaching ◽  
Self Perception ◽  
High Concentration ◽  
Low Concentration ◽  
Positive Effects ◽  
One Year

Abstract Background Dental bleaching in traditional concentrations generates greater sensitivity. In this respect, new systems of lower concentration of hydrogen peroxide for tooth bleaching appeared, with color stability unknown over time. The aim of this study was to compare the change and stability of color with low-concentration (6%) hydrogen peroxide gel in an in-office bleaching setting relative to conventional 37.5% gel, including their effects on psychosocial and esthetic self-perception, after 1 year. Methods Patients (n = 25) were assessed at 12 months post bleaching treatment (whitening with 6% chemo-activated alkaline formula gel versus 37.5% traditional concentration gel). Color changes were measured objectively using total variation in color (ΔE), and subjectively using Vita Classical and Vita Bleached scale (ΔSGU) by calibrated evaluators (Kappa = 0.85). The Psychosocial Impact of Dental Aesthetics Questionnaire (PIDAQ) and Oral Health Impact Profile (OHIP-14) aesthetic questionnaires were used to measure the self-perception and the psychosocial impact of the bleaching protocols. Results The effect (ΔE) of 37.5% HP (8.37 ± 2.73) was significantly better than that of 6% HP (5.27 ± 2.53) in terms of color rebound after 1 year of follow-up. There were significant differences in psychosocial impact and esthetic self-perception measurements prior to bleaching versus one-year post-whitening time points; positive effects were maintained. Conclusions Low concentration (6%) achieved effective bleaching with good stability after 1 year, accompanied by a positive psychosocial impact and enhanced self-perception at follow-up. Trial registration NCT03217994 (before enrollment of the first participant). Data register: July 14, 2017.

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