Effect of Carbamide Peroxide Bleaching Gel Concentration on the Bond Strength of Dental Substrates and Resin Composite

2010 ◽  
Vol 35 (4) ◽  
pp. 463-469 ◽  
Author(s):  
D. C. Barcellos ◽  
P. Benetti ◽  
V. V. B. Fernandes ◽  
M. C. Valera
Keyword(s):  
Bond Strength ◽  
Clinical Relevance ◽  
Resin Composite ◽  
Scientific Information ◽  
Bleaching Agent ◽  
Carbamide Peroxide ◽  
Peroxide Bleaching ◽  
Mineral Loss

Clinical Relevance According it has been demonstrated that dental substrates can recover from mineral loss after 14 days from the last bleaching agent application, there is no scientific information about this effect on the dental substrate-adhesive restoration interface.

The Effect of a 10% Carbamide Peroxide Bleaching Agent on the Microhardness of Four Types of Direct Resin-based Restorative Materials

2013 ◽  
Vol 38 (3) ◽  
pp. 316-323 ◽  
Author(s):  
MQ AlQahtani
Keyword(s):  
Vickers Hardness ◽  
Resin Composite ◽  
The Other ◽  
Control Group ◽  
Distilled Water ◽  
Bleaching Agent ◽  
Carbamide Peroxide ◽  
Peroxide Bleaching ◽  
Significant Difference ◽  
Restorative Materials

SUMMARY Purpose This in vitro study was undertaken to evaluate the effect of a 10% carbamide peroxide bleaching agent on the microhardness of four types of direct resin-based restorative materials. Materials and Methods Thirty disk-shaped specimens (10.0 mm diameter × 2.0 mm depth) of each material, including a microhybrid resin composite (Z250), a nanofilled resin composite (Z350), a silorane-based low-shrink resin composite (P90), and a hybrid resin composite (Valux Plus), were fabricated and then polished with medium, fine, and superfine polishing discs. After being polished, specimens were cleaned with distilled water for 2 min in an ultrasonic bath to remove any surface debris and then stored in distilled water at 37°C for 24 hours. Specimens from each material were divided into three groups (n=10). One group was selected as a control group (nontreated with bleaching agent). The other two groups were treated with bleaching agent for 14 days (group A) and for 14 days followed by immersion in artificial saliva for 14 days (group B). The top surfaces of the specimens in the different groups were also subjected to the Vickers hardness test with a load of 300 g and 15-second dwell time. Data were analyzed with a one-way analysis of variance and Tukey's HSD test (α = 0.05). Results There was a general reduction of Vickers hardness numbers (VHN) values of treated groups compared with the control group for each material used, but this reduction was minimal, with no significant difference between groups in Z250, whereas the other three materials (Z350, P90, and Valux Plus) showed a significant reduction of VHN of treated groups compared with the control group. Conversely, the findings showed no significant difference between treated groups A and B in all materials used except P90. Conclusion A 10% carbamide peroxide bleaching agent had an adverse effect on the microhardness of nanofilled, silorane-based low-shrink, and hybrid types of resin-based composite materials compared with the microhybrid type.

Bond Strength Comparison of Amalgam Repair Protocols Using Resin Composite in Situations With and Without Dentin Exposure

2010 ◽  
Vol 35 (6) ◽  
pp. 655-662 ◽  
Author(s):  
M. Özcan ◽  
G. Schoonbeek ◽  
B. Gökçe ◽  
E. Çömlekoglu ◽  
M. Dündar
Keyword(s):  
Bond Strength ◽  
Clinical Relevance ◽  
Resin Composite ◽  
Amalgam Restorations

Clinical Relevance For reliable repair of amalgam restorations, including dentin fractures, the amalgam surface should first be silica coated; dentin/enamel should be etched, washed and rinsed thoroughly. Then, amalgam should be silanized and primer/bonding should be applied onto dentin.

scholarly journals Microhardness and color monitoring of nanofilled resin composite after bleaching and staining

2014 ◽  
Vol 08 (02) ◽  
pp. 160-165 ◽  
Author(s):  
Isabel Cristina G. Bandeira de Andrade ◽  
Roberta Tarkany Basting ◽  
José Augusto Rodrigues ◽  
Flávia Lucisano Botelho do Amaral ◽  
Cecilia Pedroso Turssi ◽  
...  
Keyword(s):  
Hydrogen Peroxide ◽  
Analysis Of Variance ◽  
Red Wine ◽  
Light Emission ◽  
Resin Composite ◽  
Distilled Water ◽  
Bleaching Agent ◽  
Carbamide Peroxide ◽  
Split Plot ◽  
Plot Design

ABSTRACT Objectives: The present study aimed to investigate the effect of staining solutions on microhardness and shade changes of a nanofilled resin composite, which had been previously in contact with bleaching agents. Materials and Methods: A total of 135 disk-shaped specimens (10 mm × 2 mm) were fabricated with a nanofilled resin (Filtek Supreme) and photocured with a Light Emission Diode (LED) unit and then allocated into three groups to be bleached with 10% or 16% carbamide peroxide (CP) bleaching agents or a 35% hydrogen peroxide (HP) product. Following bleaching, specimens within each group were subdivided into three groups to be immersed in coffee, red wine or distilled water. Microhardness and color were monitored at baseline, after bleaching and after staining. Results: Analysis of variance for split-plot design showed lower microhardness values when the composite had been in contact with HP (P < 0.0001). The specimens immersed in red wine and coffee provided lower microhardness values than those immersed in distilled water, regardless of the bleaching agent to which the composites were previously exposed. Kruskal Wallis and Dunn tests demonstrated that the composite was lighter after bleaching with a 35% HP agent (P < 0.0500). Conclusion: The composite was darker as a result of being immersed either in red wine or coffee, regardless of the bleaching agent.

scholarly journals Effects of 16% Carbamide Peroxide Bleaching on the Surface Properties of Glazed Glassy Matrix Ceramics

2020 ◽  
Vol 2020 ◽  
pp. 1-7
Author(s):  
Necla Demir ◽  
Muhammet Karci ◽  
Mutlu Ozcan
Keyword(s):  
Surface Roughness ◽  
Surface Properties ◽  
Glassy Matrix ◽  
Bleaching Agent ◽  
Carbamide Peroxide ◽  
Peroxide Bleaching ◽  
Cad Cam ◽  
Ceramic Restorations ◽  
Bleaching Gels ◽  
Scanning Electron

Objective. To determine the influence of the home bleaching agent, Opalescence PF, on the surface roughness and microhardness of glazed glassy matrix CAD-CAM ceramics. Materials and Methods. The 28 sintered leucite- and lithium disilicate-reinforced ceramic specimens (IPS Empress CAD and IPS e.max CAD) were divided into control and bleached groups. The home bleaching agent was applied to specimens of bleached groups for 7 days. The surface roughness and microhardness of all specimens were measured. A scanning electron microscope was used to evaluate the surface properties. The data were statistically analyzed by two-way ANOVA. Results. The control e.max CAD showed the lowest surface roughness values. For both Empress and e.max CAD, surface roughness was significantly higher for the bleached group (p<0.05). No significant differences in microhardness were observed. Conclusions. According to our study, patients should be careful when using home bleaching agents because whitening agents can affect the mechanical properties of full ceramic restorations like e.max CAD and Empress CAD. Ceramic polishing may be required in clinical situations where ceramic restorations are accidentally exposed to bleaching gels.

Effect of carbamide peroxide bleaching agent on the surface roughness and gloss of a pressable ceramic

2019 ◽  
Vol 31 (5) ◽  
pp. 451-456 ◽  
Author(s):  
Felipe Tarosso Rea ◽  
Ana Carolina Cabral Roque ◽  
Ana Paula Macedo ◽  
Rossana Pereira Almeida
Keyword(s):  
Surface Roughness ◽  
Bleaching Agent ◽  
Carbamide Peroxide ◽  
Peroxide Bleaching

scholarly journals The effect of a bleaching agent on the pigment removal and the bond strength of bulk-fill resin composites: an in vitro study

2018 ◽  
Vol 47 (5) ◽  
pp. 298-304
Author(s):  
Caroline de Farias CHARAMBA ◽  
Renally Bezerra Wanderley LIMA ◽  
Sônia Saeger MEIRELES ◽  
Rosângela Marques DUARTE ◽  
Ana Karina Maciel ANDRADE
Keyword(s):  
Bond Strength ◽  
Color Change ◽  
Resin Composite ◽  
Distilled Water ◽  
Filling Material ◽  
Resin Composites ◽  
Bleaching Agent ◽  
Microtensile Testing ◽  
Before And After

Abstract Introduction In order to simplify the technique, reduce the time required for direct adhesive restorations, bulk-fill resin composites have been developed be applied in bulk placement up to 4 mm increments. Objective Evaluating the color change (ΔE) and the microtensile bond strength (μTBS) of bulk fill resin composites (BFRC) to dentin after the immersion in regular beverages and the application of bleaching systems. Method Forty-five human molar teeth were randomly distributed in three groups according to the filling material (n=15): Filtek Bulk Fill, Tetric N Ceram Bulk Fill and Filtek Z100. The restored teeth were immersed in coffee, wine and distilled water (n=5) for 72 hours. The color parameters were measured using a spectrophotometer, having as basis the CIE L*a*b*, before and after tooth staining and application of bleaching processes. Subsequently, the teeth were sectioned to obtain the specimens for the microtensile testing. The ΔE values were analyzed applying the Kruskal-Wallis and the Wilcoxon tests, and the μTBS values were analyzed applying the ANOVA and the Bonferroni tests (p<0.05). Result There were no significant differences in the ∆E values when comparing the BFRCs to the conventional resin composite (CRC) in most of the experimental groups. The ∆E values did not present significant differences before and after the application of bleaching processes for all the tested resin composites. The BFRCs presented higher μTBS values than the CRC after exposure to distilled water, wine and bleaching agent. Conclusion The studied BFRCs presented similar color stability to the CRC. The BFRCs presented higher bond strength to the dentin than the CTC in most of the evaluated conditions. The bleaching agent was not effective in whitening the stained restored teeth.

scholarly journals Effect of Carbamide Peroxide Treatments on the Metal-ion Release and Microstructure of Different Dental Amalgams

2007 ◽  
Vol 32 (5) ◽  
pp. 476-481 ◽  
Author(s):  
S. Gurgan ◽  
A. Kiremitci ◽  
F. Yalcin ◽  
T. Alpaslan ◽  
E. Yazici
Keyword(s):  
Metal Ions ◽  
Clinical Relevance ◽  
Metal Ion ◽  
Dental Amalgam ◽  
Carbamide Peroxide ◽  
Ion Release ◽  
Peroxide Bleaching ◽  
Metal Ion Release ◽  
Dental Amalgams

Clinical Relevance Carbamide peroxide bleaching releases metal-ions from dental amalgam.

The Effect of Hydrogel and Solution of Sodium Ascorbate on Bond Strength in Bleached Enamel

10.2341/05-85 ◽  
2006 ◽  
Vol 31 (4) ◽  
pp. 496-499 ◽  
Author(s):  
S. Kimyai ◽  
H. Valizadeh
Keyword(s):  
Bond Strength ◽  
Clinical Relevance ◽  
Resin Composite ◽  
Sodium Ascorbate

Clinical Relevance Both forms of sodium ascorbate (hydrogel and solution) can significantly increase the bond strength of resin composite to enamel after bleaching.

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