Effects of Orthodontic Adhesives on Dental Enamel Color Alteration Using Chemically Cured and Light-Cured Composites

Objectives: The purpose of this investigation was to evaluate the color alteration of dental enamel following the use of light-cured and chemically cured composites for bonding of metal brackets. Materials and Methods: Sixty extracted human premolars divided into five groups (n=12) were included in this study. Metal brackets were bonded using chemically cured (System 1+ and Unite) and light-cured (Transbond XT and Grengloo) composites. The control group remained untreated. After 72 hours of immersion in a staining solution and 24 hours of photoaging, the brackets were debonded, and adhesive remnants were cleaned using a 12-blade tungsten carbide bur and polished with Sof-Lex discs. The color was assessed at the baseline and after cleaning procedures in accordance with the CIE L*a*b (lightness, red/green, blue/yellow) color system. Statistical analyses were performed using paired sample t-test and one-way analysis of variance (ANOVA). Results: The L*, a*, and b* parameters showed a significant increase in all adhesive groups (P<0.001). The experimental groups showed significant color changes (P<0.05), and the mean ΔE ranged from 2.46 to 3.15 units. No significant difference was found between the ΔE of the adhesive groups (P>0.05). Conclusion: The enamel color change is influenced by bonding and debonding procedures. Chemically cured and light-cured composites have similar effects on dental enamel color alterations.

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Evaluation of color change in acrylic and bisacrylic resin resins in different solutions

Journal of Research in Dentistry ◽

10.19177/jrd.v5e4201776-84 ◽

2018 ◽

Vol 5 (4) ◽

pp. 76

Author(s):

Mone Laiz Bortoli ◽

Cristina Von Appen ◽

Camila Longoni ◽

Carmen Beatriz Borges Fortes ◽

Jefferson Tomio Sanada

Keyword(s):

Color Change ◽

Color Stability ◽

Acrylic Resin ◽

Color Variation ◽

Color Reading ◽

Control Group ◽

Color Changes ◽

Significant Difference ◽

Prosthesis Material ◽

Chlorhexidine Solution

Aim: This work aimed to evaluate the color stability of an acrylic resin chemically activated (ARCA) using different handling techniques, and a bisacrylic resin when exposed to different pigmentation solutions.Material and Methods: Silicon matrixes were confectioned (10x10x3mm) to be used as specimens. The groups were designed as follows: Group Pot, Group Brush, Group Manufacturer and Group Bisacrylic (n=18). Each group was exposed to three different pigmentation solutions: distilled water, coke and chlorhexidine digluconate 0.12%. Three readings were performed for each specimen using a spectrophotometer, and the evaluations were carried out in three different time. After the color reading, three averages and the standard deviation of variation were performed after 24 hours (T1), 7 days (T2) and 14 days (T3). Data were submitted to the ANOVA and 2 criteria and Tukey (P<0.05) in the statistical software SSPS 18 for Macintosh (SPSS Inc., Chicago, USA).Results: When compared the solutions in each group of material, there was no statistically significant difference, except for T3, where the group Dencor Brush and Bisacrylic demonstrated higher color variation in all the solutions, even in the control group, and the values in Chlorhexidine higher than the other, showing greater instability after 14 days.Conclusions: With the results, bisacrylic resin used as provisory prosthesis material presents greater color instability than the ARCA, when submitted to different solutions. Bisacrylic resin and Dencor Brush present significantly visible color changes in chlorhexidine solution after 14 days. All the materials in coke solution present homogeneity in the color change after 7 days exposition to the solution, with no visible color change.

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Influence of Hydrogen Peroxide Bleaching Gels on Color, Opacity, and Fluorescence of Composite Resins

Operative Dentistry ◽

10.2341/11-189-l ◽

2012 ◽

Vol 37 (5) ◽

pp. 526-531 ◽

Cited By ~ 10

Author(s):

CRG Torres ◽

CF Ribeiro ◽

E Bresciani ◽

AB Borges

Keyword(s):

Hydrogen Peroxide ◽

Composite Resin ◽

Color Change ◽

Composite Resins ◽

Control Group ◽

Peroxide Bleaching ◽

Color Changes ◽

Tukey Test ◽

Bleaching Gels ◽

Bleaching Treatment

SUMMARY The aim of the present study was to evaluate the effect of 20% and 35% hydrogen peroxide bleaching gels on the color, opacity, and fluorescence of composite resins. Seven composite resin brands were tested and 30 specimens, 3-mm in diameter and 2-mm thick, of each material were fabricated, for a total of 210 specimens. The specimens of each tested material were divided into three subgroups (n=10) according to the bleaching therapy tested: 20% hydrogen peroxide gel, 35% hydroxide peroxide gel, and the control group. The baseline color, opacity, and fluorescence were assessed by spectrophotometry. Four 30-minute bleaching gel applications, two hours in total, were performed. The control group did not receive bleaching treatment and was stored in deionized water. Final assessments were performed, and data were analyzed by two-way analysis of variance and Tukey tests (p<0.05). Color changes were significant for different tested bleaching therapies (p<0.0001), with the greatest color change observed for 35% hydrogen peroxide gel. No difference in opacity was detected for all analyzed parameters. Fluorescence changes were influenced by composite resin brand (p<0.0001) and bleaching therapy (p=0.0016) used. No significant differences in fluorescence between different bleaching gel concentrations were detected by Tukey test. The greatest fluorescence alteration was detected on the brand Z350. It was concluded that 35% hydrogen peroxide bleaching gel generated the greatest color change among all evaluated materials. No statistical opacity changes were detected for all tested variables, and significant fluorescence changes were dependent on the material and bleaching therapy, regardless of the gel concentration.

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

The Open Dentistry Journal ◽

10.2174/1874210601610010516 ◽

2016 ◽

Vol 10 (1) ◽

pp. 516-521 ◽

Cited By ~ 1

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.

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Effect of an Optical Whitening Toothpaste on Color Stability of Tooth-Colored Restorative Materials

European Journal of Dentistry ◽

10.1055/s-0040-1705071 ◽

2020 ◽

Vol 14 (01) ◽

pp. 085-091

Author(s):

Sedighe Sadat Hashemikamangar ◽

Farnoosh Hoseinpour ◽

Nazanin Kiomarsi ◽

Mehrzad Gholampour Dehaki ◽

Mohammad Javad Kharazifard

Keyword(s):

Statistical Analysis ◽

Color Change ◽

Color Stability ◽

Composite Resins ◽

Time Points ◽

Color Changes ◽

Honestly Significant Difference ◽

Significant Difference ◽

Resin Modified Glass Ionomer ◽

Composite Samples

Abstract Objectives This study aimed to assess the effect of an optical whitening toothpaste on color stability of microhybrid, nanofilled, and microfilled composite resins and resin-modified glass ionomer (RMGI) cement in comparison of two other toothpastes. Materials and Methods In this experimental study, disc-shaped composite samples were fabricated. The samples were then polished using silicon carbide papers. Twenty-seven samples of each material were fabricated and subjected to colorimetry using a spectrophotometer. Each group of material was then divided into three subgroups for the application of conventional whitening and whitening containing blue covarine toothpastes. One operator brushed the samples with an electric soft toothbrush with circular motion twice a day, each time for 30 seconds. Colorimetry was performed at 0, 1, 7, 30, and 90 days. Statistical Analysis Two-way analysis of variance (ANOVA), one-way ANOVA, and Tukey’s honestly significant difference (HSD) test were used for statistical analysis. Results The interaction effect of type of restorative material and time on ∆E was not significant at baseline or 1 day (p > 0.05). The effect of type of toothpaste on ∆E was not significant at baseline or 1 day (p = 0.78) but the effect of type of material was significant (p < 0.05). The toothpastes had significantly different effects on ∆E of Z250 at all time points (p < 0.05) except for ∆E0–30 (p = 0.106). The toothpastes had significantly different effects on ∆E of Z350 and Gradia at all time points (p < 0.05). The same was true for RMGI except for ∆E0–7 (p = 0.43) and ∆E0–90 (p = 0.52). The majority of color changes caused by toothpastes were not clinically perceivable (∆E < 3.3), except for ∆E0–90 by the whitening toothpaste (∆E = 9), ∆E0–90 by the conventional toothpaste for Z350 (∆E = 3.9), and ∆E0–1 by the whitening toothpaste for RMGI (∆E = 3.7). Conclusion The color change of all composite samples was not clinically perceivable (<3.3) at all time points, which shows that the tested toothpastes do not cause a significant change in color of composite materials.

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The effect of optical brightening toothpaste on the color stability of esthetic restorative materials

International Dental Research ◽

10.5577/intdentres.2021.vol11.suppl1.13 ◽

2021 ◽

Vol 11 (Suppl. 1) ◽

pp. 81-85

Author(s):

Firdevs Kahvecioğlu ◽

Elçim Çoban ◽

Hayriye Esra Ülker

Keyword(s):

Color Change ◽

Calculated Data ◽

Color Stability ◽

Color Changes ◽

Significant Difference ◽

Restorative Materials ◽

Cherry Juice ◽

Native Speakers Of English ◽

Materials Used ◽

Post Hoc

Aim: The aim of this study is to evaluate the effects of whitening toothpaste applications on the color stability of different tooth-colored restorative materials (Fuji IX, GC Fuji II LC, Equia Forte, and Kerr Point 4) Methodology: Standardized fourty disc-shaped specimens were prepared from esthetic restorative materials and polished. The baseline color values of each specimen were then measured using a spectrophotometer, according to the Commission Internationale de l'Eclairage L*, a*, and b* (CIELAB) color scale. Ten specimens from each group were then immersed in two different beverages (cherry juice and coke) for seven days. After immersion, the color value of each specimen was re-measured. Each sample was brushed with whitening toothpaste for 30 seconds using an electric toothbrush. The samples were kept in distilled water at room temperature and brushing continued twice a day for seven days. The color change value, Delta E (ΔE), was calculated. Data were analyzed by two-way ANOVA and post hoc Tukey's test. Results: When the results were evaluated, after the colored samples had been brushed with whitening toothpaste, a difference was found between the Delta E values according to the materials used (p<0.001), but no difference was found in relation to the beverages (p>0.001). When the values of the color changes were evaluated after the first brushing with whitening toothpaste and before the specimens were colored with drinks, a difference was observed in the Fuji II cola, Fuji II cherry, and Equia Forte cola groups (p<0.05). When the values of the color changes were evaluated for specimens in which brushing had been done twice a day for seven days with whitening toothpaste and before they were colored with drinks, a significant difference was observed in the Fuji II cherry and Equia Forte cola groups (p<0.05). Conclusion: Using Signal White Now whitening toothpaste for 2 min 2 times a day for seven days caused significant changes in the color of the restorative materials. The color change is dependent upon the type of restorative material that is used. How to cite this article: Kahvecioğlu F, Çoban E, Ülker HE. The effect of optical brightening toothpaste on the color stability of esthetic restorative materials. Int Dent Res 2021;11(Suppl.1):80-4. https://doi.org/10.5577/intdentres.2021.vol11.suppl1.13 Linguistic Revision: The English in this manuscript has been checked by at least two professional editors, both native speakers of English.

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The Effect of Desensitizing Toothpastes and Coffee Staining on the Optical Properties of Natural Teeth and Microhybrid Resin Composites: An In-Vitro Study

BioMed Research International ◽

10.1155/2018/9673562 ◽

2018 ◽

Vol 2018 ◽

pp. 1-7

Author(s):

Sedanur Turgut ◽

Hamiyet Kılınç ◽

Kıvanç Utku Ulusoy ◽

Bora Bagis

Keyword(s):

Color Change ◽

Cetylpyridinium Chloride ◽

Human Tooth ◽

Staining Procedure ◽

Control Group ◽

Human Teeth ◽

Color Changes ◽

Stannous Fluoride ◽

Color Measurements ◽

Natural Teeth

Objective. To evaluate the effect of different desensitizing toothpastes and coffee staining on the discoloration rate of natural human tooth and composite materials. Materials and Methods. A total of 56 human teeth and 56 composite specimens were used. After initial color measurements were taken, specimens and teeth were exposed to simulated toothbrushing with six desensitizing toothpastes containing different active ingredients: stannous fluoride, strontium acetate, potassium citrate and hydroxyapatite, cetylpyridinium chloride, arginine, and novamin. Specimens were then exposed to coffee staining. Throughout the staining procedure, the storing solution was refreshed every day and the specimens were brushed with the tested toothpastes. Color measurements and changes were recorded at each stage and analyzed with one-way ANOVA, Dunnett tests, and paired sample t-test (p<0.05). Results. The largest color change was obtained with the stannous fluoride toothpaste after coffee staining for natural teeth (2.6 ΔE00⁎) and composite specimens (3.1 ΔE00⁎). Coffee staining resulted in significant changes for ΔE00⁎ values of all groups, except for natural teeth brushed with a novamin-based (p= 0.06) toothpaste. For composite specimens, only the stannous fluoride and cetylpyridinium chloride-based toothpastes resulted in significant color changes relative to the control group. ΔL⁎ and Δb⁎ values were also increased after staining for all groups (p<0.05). Conclusions. Desensitizing toothpastes alone did not cause perceptible color changes; however, in combination with coffee staining, it tended to increased discoloration for both composites and natural teeth.

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Effect of Silver Nanoparticles on Some Physical& Biological Properties of Fluid Denture Base Material

Al-Kitab Journal for Pure Sciences ◽

10.32441/kjps.04.01.p3 ◽

2020 ◽

Vol 04 (1) ◽

pp. 27-40

Author(s):

Jaymin Taher ◽

Salem Salem

Keyword(s):

Silver Nanoparticles ◽

Impact Strength ◽

Color Change ◽

Base Material ◽

Color Stability ◽

Biological Properties ◽

Strength Test ◽

Control Group ◽

Transverse Strength ◽

Significant Difference

Poly methyl methacrylate (PMMA) is one of the most widely used materials in modern prosthodontics. It is widely known due to its simplicity in use and acceptable aesthetic. A new concept of polymerization fluid resin technique was instead of heat and gypsum material. Forty specimens were prepared from two brands of fluid acrylic resin. The samples were divided into two groups, the first one was the control while the other group was incorporated with silver nanoparticles(modified). The tests performed were impact strength, transverse strength, color stability and candida retention ability on the samples. 10 samples for each test were used. The results showed that modified group had significantly higher impact strength than the control group. There was non-significant difference between group of modified fluid acrylic and control group. Regarding color stability, there were highly significant color change after 10 days of immersion in the tea solution for the modified group the results of the biological test showed that the candida retention of the control group was significantly higher than modified group. Within the limitation of this study it can be concluded that addition of silver nanoparticles has resulted in significant difference between control and modified group for impact strength test. While non-significant difference was seen for transverse strength test. In regard to color stability, showed enhancement in color stability for both before and after placement in tea solution. Addition of silver nanoparticles also caused reduction in candida albicans retention in the added samples.

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Perbedaan efektivitas jus tomat (Lucopersicon esculentum Mill.) dan jus apel (Mallus sylvestris Mill.) sebagai bahan alami pemutih gigi

e-GIGI ◽

10.35790/eg.4.2.2016.13488 ◽

2016 ◽

Vol 4 (2) ◽

Author(s):

Enny F. S. Lumuhu ◽

Martha M. Kaseke ◽

Wulan G. Parengkuan

Keyword(s):

Apple Juice ◽

Color Change ◽

Human Interaction ◽

Tomato Juice ◽

Control Group ◽

Carbamide Peroxide ◽

Control Group Design ◽

Anterior Teeth ◽

Tooth Discoloration ◽

Significant Difference

Abstract: Teeth appearance plays an important role in human interaction. One of its problems is tooth discoloration which can affect personal self confidence and appearance. Chemicals for whitening the teeth can cause negative effects such as decreased enamel hardness and gingival iritaion. An alternative material that can be used for that purpose is natural substance inter alia tomato juice (Lucopersicon esculentum Mill.) which contains hydrogen peroxide and apple juice (Mallus sylvestris Mill.) which contains malic acid. This study aimed to determine the difference in effectiveness of tomato juice and apple juice as natural bleaching agents. This was a true experimental study with a pretest postest only control group design. There were 30 samples of post-extraction anterior teeth soaked in coffee for 12 days and were further divided into 3 groups, each of 10 samples. Group 1 was immersed in tomato juice; group 2 was immersed in apple juice; and group 3 as the positive control was immersed in carbamide peroxide 10%. Each group was observed after 1 day, 3 days, and 5 days. The color change was measured by using CIEL*a*b method. The results showed that tomato juice, apple juice, and carbamide peroxide 10% could whiten the teeth. However, tomato juice was more effective compared to apple juice and carbamide peroxide 10%. Apple juice and carbamide peroxide 10% did not show any significant difference in color change. Keywords: tomato juice, apple juice, carbamide peroxide 10%, tooth discolorationAbstrak: Penampilan gigi berperan dalam interaksi manusia. Masalah dalam penampilan gigi salah satunya ialah perubahan warna gigi yang dapat memengaruhi kepercayaan diri dan keindahan penampilan seseorang. Penggunaan bahan kimia untuk memutihkan gigi dapat berdampak negatif seperti penurunan kekerasan email dan iritasi gingiva. Bahan alternatif yang dapat digunakan untuk memutihkan gigi yaitu dengan bahan alami antara lain jus tomat (Lucopersicon esculentum Mill.) yang mengandung hidrogen peroksida dan jus apel (Mallus sylvestris Mill.) yang mengandung asam malat. Penelitian ini bertujuan untuk mengetahui perbedaan efektivitas jus tomat dan jus apel sebagai bahan alami pemutih gigi. Terdapat 30 sampel gigi anterior pasca ekstraksi yang direndam kopi selama 12 hari. Sampel dibagi menjadi 3 kelompok masing-masing terdiri dari 10 sampel. Kelompok 1 direndam dalam jus tomat; kelompok 2 direndam dalam jus apel; dan kelompok 3 sebagai kontrol positif menggunakan karbamid peroksida 10%. Setiap kelompok dilakukan pengamatan 1 hari, 3 hari dan 5 hari. Perubahan warna diukur menggunakan metode CIEL*a*b. Hasil penelitian mendapatkan jus tomat, jus apel, dan karbamid peroksida 10% dapat memutihkan gigi. Jus tomat lebih efektif memutihkan gigi dibandingkan jus apel dan karbamid peroksida 10%. Jus apel dan karbamid peroksida 10% tidak memiliki perbedaan memutihkan gigi yang signifikan.Kata kunci: jus tomat, jus apel, karbamid peroksida 10%, perubahan warna gigi

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Evaluation of dental enamel color after fixed orthodontic therapy using two types of protectors to prevent white spot lesions (A prospective clinical study)

Journal of Baghdad College of Dentistry ◽

10.26477/jbcd.v32i2.2889 ◽

2020 ◽

Vol 32 (2) ◽

pp. 17-21

Author(s):

Yasir Allabban

Keyword(s):

Color Change ◽

Dental Enamel ◽

White Spot ◽

P Value ◽

Prospective Clinical Study ◽

White Spot Lesions ◽

Significant Difference ◽

Before And After ◽

Fixed Appliances ◽

One Way Anova

Background: The aim of this study is to evaluate the color change ∆E of the dental enamel following treatment with 2 kinds of protector (icon infiltrant, clinpro varnish) before fixed orthodontic treatment to avoid the possible white spot lesions. Materials and Methods: Fifty four subjects treated with fixed appliances were divided into 3 groups: the 1st group was control, while the 2nd and 3rd groups were treated with icon infiltrant and clinpro varnish before bonding procedure, respectively. Color parameters (L,a,b) were recorded for the middle and gingival thirds before and after bonding procedure to get the ∆E of each group. Results: One-way ANOVA test showed a non-significant difference in ∆E between the 3 groups at p value <0.05, while there were highly significant differences in value of ∆E between middle thirds and the gingival thirds in all groups. Conclusion: The icon infiltrant and clinpro varnish have no effect on color of the enamel when used before the bonding procedure. Color change ∆E occurring in middle third is higher than that of the gingival third. Keywords: Color change, protector, white spot lesions

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Antimicrobial and mechanical acrylic resin properties with silver particles obtained from Fusarium oxysporum

Brazilian Dental Science ◽

10.14295/bds.2018.v21i1.1534 ◽

2018 ◽

Vol 21 (1) ◽

pp. 96 ◽

Cited By ~ 1

Author(s):

Tabata Prado Sato ◽

Celio Ilidio Conjo ◽

Rodnei Dennis Rossoni ◽

Juliana Campos Junqueira ◽

Renata Marques de Melo ◽

...

Keyword(s):

Surface Roughness ◽

Fusarium Oxysporum ◽

Biofilm Formation ◽

Antimicrobial Agents ◽

Acrylic Resin ◽

Control Group ◽

Significant Difference ◽

Color Alteration ◽

Cie Lab

Objective: This study evaluated the effects of the incorporation of silver nanoparticles (AgNPs) obtained from Fusarium oxysporum on heat-activated acrylic resin (HAAR) and their influence on resin’s surface roughness, hardness, color alteration and antimicrobial capacity against Candida albicans. Material and Methods: For this, 50 discs of HAAR (2x5 mm) were produced and divided into three groups, Control: HAAR; Ag1: HAAR plus 0.539 mg of AgNPs; and Ag2: HAAR plus 1.1 mg of AgNPs. Knopp hardness (HK), surface roughness (Ra and Rz) and color alteration according to the CIE Lab were measured. Specimens were then evaluated in vitro with regard to C. albicans biofilm formation through formed colony count (CFU/mL). Scanning Electron Microscopy (SEM) and Atomic force microscopy (AFM) analyses were performed. Results: The addition of AgNPs of both concentrations changed Ra, Rz and HK significantly. There was statistically significant difference for L (p=0.00); a*(p=0.00) and b*(p=0.00) parameters. There were no differences between Ag1 and Ag2 biofilm formation, but the comparison of both with the control group presented a significant reduction (p=0.0091) on biofilm formation. SEM and AFM images showed no signs of NPs clustering. Conclusion: It can be concluded tha AgNPs incorporation in HAAR was effective in reducing C. albicans activity, with a slight change in color and hardness of the material, being effective therefore, in regions such as the dental prostheses palate, which have lesser aesthetic appeal.KeywordsAcrylic resins; Silver; Antimicrobial agents.

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