scholarly journals Analysis of the Influence of Food Colorings in Esthetic Orthodontic Elastomeric Ligatures

2016 ◽  
Vol 10 (1) ◽  
pp. 516-521 ◽  
Author(s):  
Vanessa Dias da Silva ◽  
Eduardo Martinelli S de Lima ◽  
Caroline Dias ◽  
Leandro Berni Osório
Keyword(s):  
Color Change ◽  
Black Tea ◽  
Control Group ◽  
Distilled Water ◽  
Water Control ◽  
Color Changes ◽  
Influence Of Food

Proposition: The purpose of this study was to evaluate in vitro the color changes of esthetic orthodontic elastomeric ligatures of different shades when exposed to four food colorings commonly found in the diet of patients. Materials and Methods: The sample consisted of esthetic orthodontic elastomeric ligatures in the colors pearl, pearl blue, pearl white and colorless, which were immersed for 72 hours in five different solutions: distilled water (control group), coffee, tea, Coca-Cola ® and wine. The color changes of the esthetic orthodontic elastomeric ligatures were measured with the aid of a spectrophotometer, at T1 - as provided by the manufacturer; and T2 - after colorings process. Results: The results indicated that the esthetic orthodontic elastomeric ligatures of all initial hues are susceptible to pigmentation. Among the evaluated colors, all changed the finished look and the color of the samples tested. In ascending order, the color of the samples was as follows: distilled water, Coca-Cola®, black tea, wine and coffee. Conclusion: The substances that have a greater potential for pigmentation in esthetic orthodontic elastomeric ligatures were black tea, wine and coffee, respectively. All shades of esthetic orthodontic elastomeric ligatures are susceptible to color change.

scholarly journals In Vitro Evaluation of Physical and Mechanical Properties of Light-Curing Resin Cement: A Comparative Study

2020 ◽  
Vol 14 (01) ◽  
pp. 152-156
Author(s):  
Luís Felipe Espíndola-Castro ◽  
Oscar Felipe Fonseca de Brito ◽  
Larissa Gabrielle Assis Araújo ◽  
Izabella Luiza Aragão Santos ◽  
Gabriela Queiroz De Melo Monteiro
Keyword(s):  
Color Change ◽  
Surface Hardness ◽  
Color Stability ◽  
Resin Cement ◽  
The Other ◽  
Distilled Water ◽  
Water Control ◽  
Mean Values ◽  
Significance Level

Abstract Objective The aim of study was to evaluate in vitro the surface hardness, sorption, solubility, and color stability of three light-cured resin cements, namely RelyX Veneer (RLX), Variolink Veneer (VLK), and All Cem Veneer (ACV). Materials and Methods Cylindrical samples (15 × 1 mm) were made for each group using a metallic mold (n = 10). Vickers microhardness test was performed, and average hardness was calculated from three indentations (300 gf/15s) per sample. The sorption and solubility of the materials were evaluated according to ISO 4049:2009 based on three samples weighing: initial (m 1), after immersion in distilled water for 7 days (m 2), and final (after removal of all moisture [m 3]). The color change was observed using a digital spectrophotometer, at three different time points, baseline, 1 day, and 1 week of immersion in coffee and distilled water (control). Statistical Analysis Shapiro–Wilk test was used to analyze the normality of the data, and groups were compared using Kruskal–Wallis and Mann–Whitney tests. A significance level of 5% was used. Results RLX showed the highest microhardness mean values (36.96 VHN), but higher sorption (23.2 µg/mm3) and solubility (2.40 µg/mm3), with statistically significant differences with the other groups. For color stability, higher ∆E was observed for the samples immersed in coffee (p = 0.009). The VLK resin cement presented statistically significant differences from the other groups, with higher color changes in coffee at 1 day (15.14) and after 1 week (23.65). Conclusion RLX resin cement showed better hardness results. All materials tested performed satisfactorily for sorption and solubility according to ISO 4049:2009. All materials showed high-staining values after 1 week of immersion in coffee.

scholarly journals A Comparison of the Bleaching Effectiveness of Chlorine Dioxide and Hydrogen Peroxide on Dental Composite

2014 ◽  
Vol 25 (6) ◽  
pp. 524-527 ◽  
Author(s):  
Anirudha Agnihotry ◽  
Karanjot S. Gill ◽  
Deepak Singhal ◽  
Zbys Fedorowicz ◽  
Sambit Dash ◽  
...  
Keyword(s):  
Hydrogen Peroxide ◽  
Chlorine Dioxide ◽  
Color Change ◽  
Dental Composite ◽  
Control Group ◽  
Distilled Water ◽  
Water Control ◽  
Color Differences ◽  
Clinically Significant ◽  
Office Systems

This study was carried out to verify if composites could be bleached using chlorine dioxide as compared with hydrogen peroxide. 3M ESPE Filtek Z350 Universal Restorative discs were prepared (n=40), with dimensions 5 mm diameter x 2 mm thickness. The discs were divided into 4 groups of 10 discs each. Color assessment was performed by CIEDE2000. The discs were stained with coffee, tea, wine and distilled water (control) solutions for 14 days, 5 hours daily. Color assessment was repeated on stained discs and followed by bleaching of 5 discs from each group using chlorine dioxide and hydrogen peroxide in-office systems. Finally, a last color assessment was performed and compared statistically. DE2000 after bleaching was very close to baseline for both the bleaching agents, although chlorine dioxide showed better results than hydrogen peroxide. After staining, there was a clinically significant discoloration (∆E2000≥3.43) for the tea, coffee and wine groups, and discoloration (∆E2000) was seen more in the wine group as compared to tea and coffee. Overall, the control group (distilled water) had the least color change in the three intervals. After bleaching, the color in all specimens returned close to the baseline. The color differences between bleaching and baseline were less than 3.43 for all groups. The obtained results show that chlorine dioxide is slightly superior to hydrogen peroxide in the bleaching of composites, while maintaining the shade of the composite close to the baseline.

scholarly journals Can the chlorhexidine gluconate solution potentiate the staining of polycrystalline ceramic brackets?

2019 ◽  
Vol 18 ◽  
pp. e191647
Author(s):  
Catharina e Silva Monteiro Barros ◽  
Jose Guilherme Neves ◽  
Ana Paula Terossi de Godoi ◽  
Ana Rosa Costa ◽  
Mario Vedovello Filho ◽  
...  
Keyword(s):  
Red Wine ◽  
Color Change ◽  
Color Variation ◽  
Distilled Water ◽  
Water Control ◽  
Significance Level ◽  
Polycrystalline Ceramic ◽  
Ceramic Brackets ◽  
Ceramic Bracket

Aim: The present study aimed to assess, in vitro, the effect of chlorhexidine on the potentiation of polycrystalline ceramic bracket staining. Methods: Seventy-two polycrystalline ceramic brackets of upper right central incisors were divided into six groups (n=12) according to immersion solution. The groups were G1 - distilled water (control); G2 - chlorhexidine; G3 - coffee; G4 - red wine; G5 - chlorhexidine associated with coffee; and G6 - chlorhexidine associated with red wine. The samples were analyzed by means of a spectrophotometer according to the CIEL*a*b* system, and color change (ΔE*) was calculated. The readings were performed at the following times: T0 - After package removal and T1 - After staining. The data were analyzed by Kruskal Wallis and t tests (p<0.05) at 5% significance level. Results: The total color variation (ΔE*) was greater in the group that received chlorhexidine associated with red wine (p<0.05) and lower in the groups that received distilled water. All other groups showed greater value variations when compared to G1 and G2. Group G6 showed a greater color change due to the potentiation of chlorhexidine with the dye substance. Conclusion: It is concluded that chlorhexidine potentiates the staining caused by red wine in polycrystalline ceramic brackets.

scholarly journals Evaluation of surface roughness and color change of bovine enamel after immersion in dye solution

2018 ◽  
Vol 5 (5) ◽  
pp. 95
Author(s):  
Ana Carolina Trentino ◽  
Larissa Marinho Azevedo ◽  
Felipe Fabrício Farias Da Silva ◽  
Maria Cristina Carvalho de Almedra Freitas ◽  
Marina Studart Alencar Borges ◽  
...  
Keyword(s):  
Hydrogen Peroxide ◽  
Surface Roughness ◽  
Color Change ◽  
Artificial Saliva ◽  
In Vitro Study ◽  
Black Tea ◽  
Control Group ◽  
Change Analysis ◽  
Miller Test

Aim: The aim of this in vitro study was to evaluate the influence of dye solution on enamel color change after bleaching protocols and the effectiveness in maintaining the color of these agents.Material and Methods: The buccal surfaces of sixty-five bovine incisors were cleaned and polished, and the enamel specimens were divided into thirteen groups: G1 to G6: treated with 6% hydrogen peroxide using different surface agents; G7 to G12: treated with 15% hydrogen peroxide using different surface agents; G13: control. After 24 hours, the groups treated were immersed in black tea solution; the control group was stored in artificial saliva. The color was evaluated prior to bleaching, 24 hours later and after immersion in the dye solution; the roughness was measured immediately after bleaching, 24 hours later and 7 days after immersion in the dye solution. The data was analyzed using the Kruskal-Wallis test, followed by the Miller test for roughness analysis, and the Duncan test for color change analysis. It was used 5% significant level with p<0.05.Results: The data found in the evaluation of surface roughness after bleaching indicated a reduction of roughness in all the groups. The surface agent Bifluoride, when applied, showed an increase in roughness after its application and it decreases after immersion in dye solution; the surface agent Desensibilize and the XP Bond adhesive showed greater color alteration after immersion in dye solution.Conclusions: All the groups studied, under different whitening technique, were effective in promoting whitening.

scholarly journals Comparative evaluation of the color stability of universal composites

2021 ◽  
Vol 11 (Suppl. 1) ◽  
pp. 234-237
Author(s):  
Merve Gürses ◽  
Nevin Çobanoğlu ◽  
Omar Faez Abdulateef
Keyword(s):  
Comparative Evaluation ◽  
Color Change ◽  
Native Speakers ◽  
Color Stability ◽  
Composite Resins ◽  
Control Group ◽  
Distilled Water ◽  
Color Changes ◽  
Before And After ◽  
Native Speakers Of English

Aim: The aim of this study is to compare the color stability of different universal composites and to evaluate the effects of keeping them in water for 1 week before coloring. Methodology: Filtek Ultimate (FU), Estelite Ʃ Quick (EQ), and Ceram X One (CX) composites were used. The specimens were kept in the dark, dry environment for 24 hours, then polished, and each composite group was divided into 3 groups: the control, the group that was kept in water for 1 week before coloring and coloring (n=7). The samples in the control group were kept in distilled water for 3 weeks. Samples in the coloring group were colored with coffee for 2 weeks (C), and the samples in the last group were kept in water for 1 week and then stained with coffee for 2 weeks (W+C) (n=7). Color measurements for all samples were taken twice, once before and once after the coloring period. The color changes of the samples were measured using the ∆E* parameter, which was calculated with before and after measurements.  Results: For all composite resins, the ΔE values of the samples in the W+C and C groups were significantly higher than those in the control group. When the composites were compared with each other, the differences between the ΔE values of the composites in the control, W+C, and C groups were not statistically significant. For FU and ESQ, at the end of the coloration period, there were no statistically significant differences between the W+C and C groups. However, for CX, the color change of the samples in the W+C group was significantly higher than that in  the C group. Conclusion: Storage in distilled water for 1 week before staining did not reduce the color change values of the samples. Thus, after composite restorations are performed, there is no need to advise patients to avoid staining foods, especially in the first week after restoration.   How to cite this article: Abdulateef OF, Çobanoğlu N, Gürses M. Comparative evaluation of the color stability of universal composites. Int Dent Res 2021;11(Suppl.1):234-7. https://doi.org/10.5577/intdentres.2021.vol11.suppl1.34   Linguistic Revision: The English in this manuscript has been checked by at least two professional editors, both native speakers of English.

scholarly journals Effect of bleaching protocols on surface roughness and color change of high- and low-viscosity bulk-fill composite resins.

2020 ◽  
Vol 33 (2) ◽  
pp. 59-68
Author(s):  
Bruna Tavares ◽  
Fabiana França ◽  
Roberta Basting ◽  
Basting Turssi ◽  
Turssi Amaral
Keyword(s):  
Surface Roughness ◽  
Composite Resin ◽  
Color Change ◽  
In Vitro Study ◽  
High Viscosity ◽  
Composite Resins ◽  
Distilled Water ◽  
Water Control ◽  
Low Viscosity

The aim of this in vitro study was to evaluate the effect of bleaching protocols on the surface roughness (Ra), color change and surface micromorphology of a low-viscosity bulk-fill composite (Filtek Bulk Fill Flow, 3M ESPE), a highviscosity bulk-fill composite (Filtek Bulk Fill, 3M ESPE) and a conventional nanoparticulate composite resin (control) (Filtek Z350 XT, 3M ESPE). Forty samples of each composite (disks 5 mm in diameter and 2 mm thick) were randomly divided into four groups (n=10), according to bleaching protocol: a) 10% carbamide peroxide gel (Opalescence, Ultradent Products) (2 h/ day, for 14 days); b) 40% hydrogen peroxide gel (Opalescence Boost, Ultradent Products) (three bleaching sessions, once a week, 45 min/session); c) whitening rinse (Listerine Whitening Extreme, Johnson & Johnson) (2 min/day, for 14 days); and d) distilled water (control). The samples were submitted to triplicate readings (Ra and color [CIELAB parameters]) before and after contact with bleaching protocols. Micromorphology was analyzed in a scanning electron microscope (SEM). Ra and color parameters (ΔL, Δa, Δb and ΔE) were analyzed by generalized linear models (α=0.05). The Ra of the high-viscosity bulk-fill was significantly higher than that of the other composites (p<0.05). Ra increased significantly (p<0.05) and surface became more irregular (SEM analysis) in all the composite resins, regardless of the bleaching protocol (p<0.05). The high-viscosity bulk-fill composite resin group had significantly lower ΔE (p<0.05) than the nanoparticulate composite resin group immersed in distilled water. It was concluded that the characteristics of each resin significantly influenced the Ra more than the bleaching protocol. The high-viscosity bulk-fill resin presented minor color change.

Effect of Children's Drinks on Color Stability of Different Dental Composites: An in vitro Study

2017 ◽  
Vol 41 (2) ◽  
pp. 120-125 ◽  
Author(s):  
Ahmed Nour El-din Ahmed Habib ◽  
Soad Abdelmoniem Abdelmoniem ◽  
Sara Ahmed Mahmoud
Keyword(s):  
Color Change ◽  
In Vitro Study ◽  
Color Stability ◽  
Dental Composites ◽  
Chocolate Milk ◽  
Water Control ◽  
Color Changes ◽  
Significant Difference ◽  
Mango Juice

Aim: To assess the effect of four different children's drinks on color stability of resin dental composites. Study design: A total of one hundred and twenty specimens were prepared from Grandio SO, Filtek Z350 XT and Filtek Z250 XT (forty specimens each). Specimens were thermocycled, then each group was further subdivided into four subgroups (n=10) according to the immersion media which were chocolate milk, mango juice, orange fizzy drink, and water (control). The initial color parameters of each specimen were recorded before immersion (baseline) and color change values were recorded three and seven days after immersion in each solution using a digital spectrophotometer. Atomic force microscope was used to measure the surface roughness in randomly selected samples after one week immersion in children's drinks. Results: All the children's drinks produced color changes in the examined resin dental composites, yet there was no statistical significant difference between the effects of tested drinks on the color changes (mean ΔE) of the three different dental composites (P&gt;0.05). Conclusions: All tested children's drinks caused clinically unacceptable color changes of the tested resin dental composites. Immersion in chocolate milk and orange fizzy led to the highest color changes in the tested resin dental composites.

scholarly journals Effects on Dentin Treated with Eluted Multi-Mineral Varnish In Vitro

2012 ◽  
Vol 6 (1) ◽  
pp. 157-163 ◽  
Author(s):  
Robert L Karlinsey ◽  
Allen C Mackey ◽  
Craig S Schwandt
Keyword(s):  
Citric Acid ◽  
Artificial Saliva ◽  
Control Group ◽  
Distilled Water ◽  
Water Control ◽  
Acid Ph ◽  
Ph Cycling ◽  
Demineralized Dentin ◽  
Acid Challenge

Purpose: The purpose of this pilot study was to assess the non-contact effects of a NaF varnish on the morphology and elemental compositions of sound and demineralized dentin in an in vitro pH cycling model. Methods: 3 mm diameter dentin cores were extracted from bovine teeth, mounted in acrylic rods, and ground and polished. Sound and demineralized (in 10 mL unstirred 50% citric acid (pH = 1.2) for two minutes) specimens were divided into four groups (N=6) corresponding to treatments with either water (control group) or non-contact Vanish® 5% NaF White Varnish with tri-calcium phosphate (3M ESPE). For the non-contact varnish group, one 0.50 ml unit-dose was applied to acrylic rods and positioned in the same stopper as three dentin specimens. The four groups were then cycled in a regimen consisting of three rounds of one-hour treatments with each round followed by immersion in a three-minute static acid challenge (0.3% citric acid, pH = 3.8). For each one-hour treatment immersion the test groups were immersed in distilled water. The specimens were thoroughly rinsed with distilled water after each treatment and after each acid challenge. After the last challenge, specimens were rinsed with distilled water and immersed in artificial saliva (AS) overnight. All treatments, acid challenges and immersion in AS solution were performed in an incubator set at 37°C. After three days, the specimens were assessed using scanning electron microscopy (SEM) and energy-dispersive X-ray spectroscopy (EDS). Results: SEM and EDS results demonstrated the non-contact varnish group can provide mineralization benefits relative to the control group for both sound and demineralized dentin substrates. Depositions from mineral eluting from the varnish developed on the intertubular and intratubular regions alike, with the most prominent depositions appearing on initially demineralized dentin. Conclusions: In this observational study, acid-resistant mineral depositions were produced on the sound and dentin surfaces without direct application from a multi-mineral varnish containing fluoride, calcium and phosphate.

scholarly journals THE IMMERSION EFFECT OF MIXTURE OF SMALL WHITE GINGER AND GARLIC EXTRACT ON COLOR CHANGES OF ACRYLIC PLATE

2020 ◽  
Vol 5 (1) ◽  
pp. 15
Author(s):  
Dea Pengasih ◽  
Debby Saputera ◽  
Bayu Indra Sukmana
Keyword(s):  
Color Change ◽  
Acrylic Resin ◽  
Simple Random Sampling ◽  
Garlic Extract ◽  
Control Group ◽  
Distilled Water ◽  
Control Group Design ◽  
Color Changes ◽  
Alkaline Peroxide ◽  
Acrylic Plate

Background: Heat cured acrylic resin is often used as a component of denture. One of the heat cured acrylic resin properties is water absorption that affects the change in acrylic color. An alternative using natural compound to minimize side effect is arising when compared to synthetic materials. A mixture of  small white ginger and garlic extract can be used as natural denture cleanser. Objective: This study aimed to know the color changes of heat cured resin plate that immersed in a mixture of 70% small white ginger and 10% garlic extract. Method: This was a true experimental study with pretest and posttest with control group design, using simple random sampling. The sample was cylindrical acrylic with 15 mm diameter and 2 mm thickness. The research was done using 18 samples heat cured acrylic resins which were divided into 3 groups, the mixture of 70% small white ginger and 10% garlic extract, alkaline peroxide, and distilled water. The color change of the sample was tested using digital analysis tools set. Results: The mean value of color changes in heat cured acrylic resin plate after immersion in a group of mixed extracts, alkaline peroxide, and distilled water were 6.23, 3.65 and 2.48. Data were analyzed using  One Way ANOVA parametric test and Dunnet T3 Post Hoc test. Conclusion: There is a difference in color changes of heat cured resin plate after the immersion in a mixture of extract and alkaline peroxide. Acrylic resin that immersed in mixed extract demonstrates a higher value of color change.

scholarly journals Effect of pigmenting agents on tooth enamel staining during immediate tooth whitening: an in vitro study

2020 ◽  
Vol 49 ◽  
Author(s):  
Daniela Luzimar CLAUDINO ◽  
João Victor Frazão CÂMARA ◽  
Osmar de AGOSTINHO NETO ◽  
Ericles Otávio SANTOS ◽  
Gisele Damiana da Silveira PEREIRA ◽  
...  
Keyword(s):  
Hydrogen Peroxide ◽  
Color Change ◽  
Tooth Enamel ◽  
Soft Drink ◽  
In Vitro Study ◽  
Tooth Bleaching ◽  
Control Group ◽  
Water Control ◽  
Mate Tea

Abstract Introduction Considering the increased search for esthetic procedures, questions emerge about the maintenance and regression of color, especially regarding the need to restrict dark foods during bleaching procedures or their influence on the stability and effectiveness of the treatment. Objective To assess the influence of staining agents on tooth enamel during immediate bleaching treatment with 35% hydrogen peroxide. Material and method Sixty bovine teeth were divided into six groups (G) (n=10): G1: distilled water (control); G2: coffee; G3: cola soft drink; G4: wine; G5: mate tea; and G6: industrialized açaí. The samples were subjected to immediate bleaching using 35% hydrogen peroxide for 21 days (three applications of 15 minutes per session, every seven days) and pigment immersion between each session for 15 minutes. The color was assessed before starting bleaching and after 21 days, using a spectrophotometer. The data obtained were subjected to one-way ANOVA and heteroscedasticity analysis by the Welch and Brown-Forsythe tests. The Tamhane test was used for group comparison. Result The color change was visible to the naked eye, considering the mean ΔE in all groups tested was higher than 3.7. However, there was no statistical difference between the control group and the groups assessed. Conclusion The contact of staining agents on bovine tooth enamel did not affect the final result of the immediate tooth bleaching.

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