Whitening effect of 35% hydrogen peroxide in simulation of tooth with orthodontic bracket

OBJECTIVE: The purpose of this study was to evaluate, in vitro, the bond strength of brackets bonded to premolars previously subjected to bleaching with a 35% hydrogen peroxide. METHODS: Twenty one healthy premolars were selected and randomly divided into three groups (n = 7). Group I (G1) included teeth that were not submitted to bleaching. The enamel surfaces of Groups II (G2) and III (G3) were submitted to a bleaching process with 35% hydrogen peroxide (Whiteness HP Maxx). On Group II (G2), after bleaching, the teeth were stored for 24 hours in distilled water at 98.6 ºF, and then, premolar metallic brackets were bonded using Transbond XT (3M) resin. Group III (G3) was submitted to the same procedure seven days after bleaching. After bonding, all teeth were stored in distilled water at 98.6 ºF for 24 hours. All groups were submitted to a traction test using an EMIC DL2000 universal testing machine at a speed of 0.5 mm/min. RESULTS AND CONCLUSION: The bracket resistance to debonding was compared between the groups by the Kruskal-Wallis nonparametric test (p < 0.05) and it was verified that the bleaching agent significantly reduced bracket adhesion when bonded 24 hours after bleaching. However, seven days after bleaching, there was no significant difference on the resistance to debonding among groups G1 (19,52 kgf) and G3 (18,44 kgf), meaning that it is necessary to wait longer after bleaching to bond brackets.

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Analysis of the Color and Fluorescence Alterations of Enamel and Dentin Treated With Hydrogen Peroxide

Brazilian Dental Journal ◽

10.1590/0103-6440201300249 ◽

2015 ◽

Vol 26 (5) ◽

pp. 514-518 ◽

Cited By ~ 3

Author(s):

Taciana Marco Ferraz Caneppele ◽

Carlos Rocha Gomes Torres ◽

Eduardo Bresciani

Keyword(s):

Hydrogen Peroxide ◽

Chemical Characterization ◽

Chemical Components ◽

Whitening Effect ◽

Color Changes ◽

Repeated Analysis ◽

Direct Fluorescence ◽

Tooth Dentin ◽

Bovine Enamel

Abstract: The aim of this study was to evaluate the effect of hydrogen peroxide whitening on fluorescence and color of bovine enamel and dentin. Twenty five dentin discs and 25 enamel discs, with 6 mm diameter and 1 mm thick, were obtained. Direct fluorescence (spectrofluorophotometry) and color (spectrophotometry) were assessed. After fluorescence and color baseline measurements, specimens were immersed in a 35% hydrogen peroxide (HP) solution for 1 h. This procedure was repeated after 7 days. Final fluorescence and color measurements were performed after the second immersion. Chemical characterization of 5 additional specimens was also performed. Data were submitted to repeated analysis of variance and Tukey´s test for fluorescence and unpaired t-test for color and chemical components (p<0.05). Fluorescence decreased significantly in dentin specimens after whitening. Enamel presented lower fluorescence than dentin at baseline, but this parameter did not decrease after whitening. Color changes were observed for both substrates, with significantly greater whitening effect in dentin (ΔE=10.37) (p<0.001). Whitening by hydrogen peroxide induced significant decrease in fluorescence of tooth dentin and promoted significant color changes in dentin and enamel with more accentuated outcomes in dentin.

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Effect of exposure frequencies of pear juice on tooth whitening

Padjadjaran Journal of Dentistry ◽

10.24198/pjd.vol25no1.26795 ◽

2013 ◽

Vol 25 (1) ◽

Author(s):

Gobalakrishna Munusamy ◽

Endang Sukartini ◽

Ayu Trisna Hayati

Keyword(s):

Hydrogen Peroxide ◽

Research Result ◽

Control Group ◽

Tooth Whitening ◽

Whitening Effect ◽

Significant Difference ◽

Pear Juice ◽

The Difference ◽

Tooth Colour

Introduction: Tooth whitening (Bleaching) is a method to restore discoloured teeth to the original tooth colour with a chemical process. The materials used in the bleaching process are hydrogen peroxide, sodium perborates and carbamide peroxide. Pear fruit consists of hydrogen peroxide which is potentially an oxidizing compound that produces free radicals that react with unsaturated bonding teeth staining substances. This study aims to analyzed tooth whitening effect of exposure of pear juice with different frequencies. Methods: The type of research was true in vitro experiment where samples of 32 maxillary premolar teeth had cut the root to CEJ. The specimens divided into four groups. The first group was soaked in pear juice two times, the second group three times, a third group four times, and the fourth was the control group using only mineral water. Tooth colour was measure using a Spectrophometer, conducted before and after individual soaking. Results: The research result is tested with ANOVA and Newman- Keuls Range Test showed a significant difference of tooth whitening degree between the frequency exposure pear juice after 2 times soaking, 3 times soaking and 4 times soaking. Conclusion: There are difference degree of whitening from the difference frequency exposure of pear juice and Pear juice exposure of 4 times gives higher whitening effect compared to frequency of 3 times, 2 times and control group which is soaked in water.

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Tooth Whitening Effect of Non-erosive Polymer based Hydrogen Peroxide Composition

International Journal of Clinical Preventive Dentistry ◽

10.15236/ijcpd.2021.17.3.147 ◽

2021 ◽

Vol 17 (3) ◽

pp. 147-147

Author(s):

Dohyuk Yoo ◽

Jae-Hyun Ahn

Keyword(s):

Hydrogen Peroxide ◽

Tooth Whitening ◽

Whitening Effect

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Enhanced bleaching effect of bovine tooth by hydrogen peroxide via calcium phosphate spheres

Advanced Applied Materials ◽

10.36822/adv.app.mater.20180101 ◽

2018 ◽

Keyword(s):

Hydrogen Peroxide ◽

Calcium Phosphate ◽

Hydrothermal Method ◽

Phosphate Buffer ◽

Bleaching Effect ◽

Whitening Effect ◽

Buffer Solutions

In the study, calcium phosphate spheres (CPS) were prepared using phosphate buffer solutions by hydrothermal method and were used to manufacture a lab-made bleaching paste. The obtained paste was used to whiten bovine teeth in order to investigate whitening effect with CPS in the paste. The results showed that the bleaching paste made by CPS does not affect bleaching effect of hydrogen peroxide (HP). On the contrary, it can prolong the bleaching effect compared the pure HP.

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Determination of the Whitening Effect of Toothpastes on Human Teeth

Odovtos - International Journal of Dental Sciences ◽

10.15517/ijds.2021.46376 ◽

2021 ◽

pp. 322-330

Author(s):

Numan Aydın ◽

Serpil Karaoğlanoğlu ◽

Elif Aybala Oktay ◽

Bilge Ersöz

Keyword(s):

Hydrogen Peroxide ◽

Activated Charcoal ◽

Single Point ◽

In Vitro Study ◽

Human Teeth ◽

Whitening Effect ◽

Significant Difference ◽

Electric Toothbrush ◽

Jaw Model

Objective: The desire of individuals to have whiter teeth increases the interest in tooth whitening products. Our aim was to in vitro study the whitening effect of hydrogen peroxide, blue covarine and active charcoal containing whitening toothpastes on human teeth. Materials and Methods: A total of 40 extracted human incisor teeth were used in the study. To measure the whitening effect of toothpastes, the teeth were divided into four subgroups and placed in the phantom tooth jaw model. Then, daily brushing was done with an electric toothbrush. The colors of the teeth were measured initially using the spectrophotometer (single point and bleached shade mode) and at the end of 7th, 14th and 28th days. Whitening effectiveness of toothpastes were studied according to CIEDE2000 formula (∆E00) and shade guide units (SGU). One-way analysis of variance (ANOVA) and Tukey test were used in the statistical analysis of the data. (p<0.05). Results: Activated charcoal containing toothpaste showed the greatest whitening effect at the end of 7th, 14th and 28th days (p<0.05). There was no statistically significant difference between the whitening effects of hydrogen peroxide and conventional toothpaste (p>0.05). Blue covarine containing toothpaste had statistically the lowest whitening effect (p<0.05). Conclusions: All toothpastes showed a whitening effect on the teeth after 7 days of use. Activated charcoal containing toothpaste showed more whitening effect after 28 days of use than hydrogen peroxide, blue covarine and traditional toothpaste.

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