Color stability and fluorescence of different orthodontic esthetic archwires

Abstract Objective: To evaluate the color stability of six esthetic archwires at different time periods and their fluorescence. Materials and Methods: Samples were evaluated after 7, 14, and 21 days of immersion in staining solution. Color measurements were performed by means of a spectrophotometer according to the Commission Internationale de I'Eclairage L*a*b* system, and color changes (ΔE*) and National Bureau of Standards units were computed. The fluorescence of as-received samples was evaluated by two observers and compared with that of a bovine central incisor. Statistical differences were investigated using analysis of variance and Tukey's post hoc test. Results: All brands showed statistically significant color change after 21 days (ΔE* from 1.88 to 12.06). The Optis archwire (fiber-reinforced composite) presented the highest color alteration, although staining was observed only near its ends. The Trianeiro archwire (coated nickel-titanium) and the Ortho Organizers archwire (coated stainless steel) presented with less color change. The Optis archwire was the only one that presented with fluorescence similar to that of bovine teeth. Conclusions: All esthetic archwires assessed showed clinically noticeable color change after 21 days in staining solution. The optical properties of currently available esthetic archwires may not yet be ideal.

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Color stability of esthetic coatings applied to nickel-titanium archwires

Revista de Odontologia da UNESP ◽

10.1590/1807-2577.02317 ◽

2017 ◽

Vol 46 (5) ◽

pp. 307-311

Author(s):

Marcus Vinicius Neiva Nunes do REGO ◽

Geórgia Wain Thi LAU ◽

Yago Carneiro ARAÚJO ◽

Rayssa Melo e SILVA

Keyword(s):

Epoxy Resin ◽

Color Change ◽

Color Stability ◽

Surface Characteristics ◽

Nickel Titanium ◽

Staining Solution ◽

Color Changes ◽

Significant Difference ◽

Total Color Change ◽

Coating Type

Abstract Introduction Color stability is an important feature to be considered when using esthetic coated archwires. Objective To evaluate color changes on the surface of esthetic nickel-titanium archwires coated with Teflon (Ortho Organizers, USA) or epoxy resin (Tecnident, Brazil) after immersion in staining solution. Material and method Twelve 20-mm-long wire segments were used for each type of coating, which were mounted as two test specimens with a width of 7 mm each. The buccal surface of the archwires was evaluated for fluorescence and color measurements both at baseline and after immersion in a staining solution for 21 days using the VITA Easyshade® Compact spectrophotometer (Model DEASYC220). Differences in total color change according to coating type were compared using an independent samples t-test (p<0.05). The surface characteristics of as-received coated archwires were assessed using scanning electron microscopy. Result Color changes were observed on the esthetic coatings, with a significant difference between the two brands analyzed. Surface analysis revealed flaws such as wear, pitting, elevations, lack of material, granulation, grooves, cracks, and lack of standardization in the coating process in all as-received archwires, but flaws were less evident in epoxy-resin coatings. Conclusion The two esthetic coatings did not show color stability, but Teflon coatings showed a more intense color change than epoxy-resin coatings.

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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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Color Stability and Gloss of Esthetic Restorative Materials after Chemical Challenges

Brazilian Dental Journal ◽

10.1590/0103-6440201902263 ◽

2019 ◽

Vol 30 (1) ◽

pp. 52-57 ◽

Cited By ~ 1

Author(s):

Eduardo Haruki Ozera ◽

Fernanda Miori Pascon ◽

Américo Bortolazzo Correr ◽

Regina Maria Puppin-Rontani ◽

Aline Rogéria de Castilho ◽

...

Keyword(s):

Color Change ◽

Artificial Saliva ◽

Color Stability ◽

Initial Surface ◽

Resin Composites ◽

Cranberry Juice ◽

Color Changes ◽

Restorative Materials ◽

Post Hoc ◽

Acidic Beverages

Abstract This study evaluated gloss and color changes of esthetic restorative materials subjected to different acidic beverages. Specimens of resin composites (Z350XT (Z350), IPS Empress Direct (ED), Charisma Diamond (CD)) were prepared and the initial surface gloss and color (ΔE) were measured (n=10). Then, the specimens were immersed in 4 mL of each of the different beverages (cranberry juice; Coca-Cola; coffee or artificial saliva) during 15 min, 3x/day for 14 days and new gloss and color readings were obtained. Color change was evaluated with the ΔE formula and gloss change values were obtained by the formula: (final gloss - initial gloss). Data was submitted to two-way ANOVA followed by Tukey’s post hoc test (a=0.05). CD showed the lowest color change among resin composites. The highest ΔE values were obtained after immersion in coffee and cranberry juice. Coffee promoted the highest gloss change (worst gloss retention), followed by cranberry juice, Coca-cola and artificial saliva (p<0.05). The type of beverage significantly influenced the gloss of resin composites. Coca-cola reduced gloss of the three resin composites in a similar manner. Coffee affected the ED gloss more than that of Z350 and CD, while cranberry juice affected Z350 more than ED and CD. Saliva had a more pronounced effect on the gloss retention of CD than ED. The beverages used in this study influenced the optical surface properties of the composites studied.

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Color Stability of the Bulk-Fill Composite Resins with Different Thickness in Response to Coffee/Water Immersion

International Journal of Dentistry ◽

10.1155/2016/7186140 ◽

2016 ◽

Vol 2016 ◽

pp. 1-5 ◽

Cited By ~ 10

Author(s):

Sayna Shamszadeh ◽

Seyedeh Mahsa Sheikh-Al-Eslamian ◽

Elham Hasani ◽

Ahmad Najafi Abrandabadi ◽

Narges Panahandeh

Keyword(s):

Composite Resin ◽

Color Change ◽

Imaging System ◽

Water Immersion ◽

Color Space ◽

Color Stability ◽

Composite Resins ◽

Distilled Water ◽

Color Changes ◽

Post Hoc

We aimed to evaluate the color stability of bulk-fill and conventional composite resin with respect to thickness and storage media. Twenty specimens of a conventional composite resin (6 mm diameter and 2 mm thick) and 40 specimens of the bulk-fill Tetric EvoCeram composite resin at two different thicknesses (6 mm diameter and 2 mm thick or 4 mm thick,n=20) were prepared. The specimens were stored in distilled water during the study period (28 d). Half of the specimens were remained in distilled water and the other half were immersed in coffee solution 20 min/d and kept in distilled water between the cycles. Color changes (ΔE) were measured using the CIEL⁎a⁎b⁎color space and a digital imaging system at 1, 7, 14, and 28 days of storage. Data were analyzed using Two-way ANOVA and Tukey’s HSD post hoc test (P<0.05). Composite resins showed significant increase in color changes by time (bulk-fill > conventional;P<0.001). Coffee exhibited significantly more staining susceptibility than that of distilled water (P<0.001). There was greater color changes with increasing the increment thickness, which was significant at 14 (P<0.001) and 28 d (P<0.01). Color change of bulk-fill composite resin was greater than that of the conventional one after coffee staining and is also a function of increment thicknesses.

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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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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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Surface properties and color stability of an acrylic resin combined with an antimicrobial polymer

Revista de Odontologia da UNESP ◽

10.1590/s1807-25772013000400002 ◽

2013 ◽

Vol 42 (4) ◽

pp. 237-242 ◽

Cited By ~ 2

Author(s):

Ana Carolina Pero ◽

Jaqueline Ignárcio ◽

Gabriela Giro ◽

Danny Omar Mendoza-Marin ◽

André Gustavo Paleari ◽

...

Keyword(s):

Surface Properties ◽

Color Stability ◽

Acrylic Resin ◽

Surface Characteristics ◽

National Bureau ◽

Color Changes ◽

Angle Measurements ◽

Contact Angle Measurements ◽

Color Data ◽

Student’S T

INTRODUCTION: The occurrence of stomatitis is common since the surface characteristics of the dentures may act as reservoirs for microorganisms and have the potential to support biofilm formation. PURPOSE: To assess the surface properties (wettability/roughness) and color stability of an acrylic resin combined with the antimicrobial polymer poly (2-tert-butylaminoethyl) methacrylate (PTBAEMA). MATERIAL AND METHOD: Thirty disc-shaped specimens of an acrylic resin (Lucitone 550) were divided into three groups: 0% (control); 5% and 10% PTBAEMA. Surface roughness values (Ra) were measured using a profilometer and wettability was determined through contact angle measurements using a goniometer and deionized water as a test liquid. Color data were measured with a spectrophotometer. Kruskal-Wallis and Dunn's test were used to compare roughness values. Wettability data were analyzed using ANOVA and Tukey's test. Color data were compared using the Student's t-test and ∆E values were classified according to the National Bureau of Standards (NBS). All statistical analyses were performed considering α=.05. RESULT: Significant differences (p<.05) were detected among the groups for roughness, wettability and color stability. According to the NBS, the color changes obtained in the 5% and 10% PTBAEMA groups were "appreciable" and "much appreciable", respectively. CONCLUSION: It could be concluded that PTBAEMA incorporation in an acrylic resin increased the roughness and wettability of surfaces and produced color changes with clinical relevance.

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Surface Quality Evaluation of Removable Thermoplastic Dental Appliances Related to Staining Beverages and Cleaning Agents

Polymers ◽

10.3390/polym12081736 ◽

2020 ◽

Vol 12 (8) ◽

pp. 1736

Author(s):

Liliana Porojan ◽

Roxana-Diana Vasiliu ◽

Sorin-Daniel Porojan ◽

Mihaela-Ionela Bîrdeanu

Keyword(s):

Surface Topography ◽

Surface Quality ◽

Color Change ◽

Water Immersion ◽

Marked Change ◽

Color Stability ◽

Black Tea ◽

Sem Images ◽

Color Changes ◽

Cleaning Agents

(1) Background: Thermoplastic materials are not inert and subject to changes in the oral environment, which affect their surface quality. Color stability and topographic characteristics of clear thermoplastic appliances are critical considerations. The study aimed to evaluate the optical changes and surface topography of different thermoplastic materials related to staining beverages and cleaning agents. (2) Methods: Thermoplastic polyethylene terephthalate glycol (PET-G) material specimens were selected for the study: S (Duran, Scheu-Dental GmbH, Iserlohn, Germany), D (Biolon, Dreve Dentamid GmbH, Unna, Germany), and B (Crystal, Bio Art Dental Equipment, Sao Carlos, Brazil). Four different media were involved for immersion: coffee (C) and black tea (T) at 55 °C, Coca-Cola (K) at 5 °C, and distilled water (W) at 22 °C. As for cleaning, chemical options and mechanical brushing were selected (P-powder, T-tablets, and X-brushing). Color changes, and mean surface roughness were measured at 24 h, 48 h, and after 7 days. Statistical analysis was performed. After the testing period, atomic force microscopy (AFM) analyses and SEM images were registered in order to characterize the surface topography. (3) Results: Quantitative color change evaluations revealed a slight change in color after 24 h and an extremely marked change after 48 h, respective 7 days. Mean roughness values are kept below the clinically acceptable limit of 0.20 µm for all samples. Related to mean nanoroughness values Sa, and 3D evaluations of the surface quality, Biolon samples have demonstrated the most constant behavior, while Crystal samples are visibly influenced by water immersion. Related to the cleaning method, the topography of Duran samples was influenced by mechanical brushing. (4) Conclusions: Nanoscale investigations provided high accuracy and more realistic surface quality examinations of the examined samples compared to profilometry. Both SEM and AFM should be used for a more detailed description of the surface topography.

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Color Stability of Heat-Cured Denture Base Resins

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.1088.519 ◽

2015 ◽

Vol 1088 ◽

pp. 519-525

Author(s):

Hua Li Huang ◽

Dan Feng ◽

Hai Huan Gong ◽

Ai Yang Song ◽

Song Zhu

Keyword(s):

Water Absorption ◽

Red Wine ◽

Color Change ◽

Artificial Saliva ◽

Color Stability ◽

Denture Base ◽

Color Changes ◽

Dental Resins ◽

Base Resin ◽

Storage Times

Heat-cured denture base resin is an important component in removable partial dentures and complete dentures, and has been widely used in the clinic. However, during long-term use, its appearance may be affected by varying degrees of color change, affecting the appearance and longevity of the dentures. In this study we examined the color changes and water absorption and solubility of dental base resins to investigate the color stability of four types of resin materials: New Century, Heraeus, Nissin and BASIS-HI. They were soaked in artificial saliva (as control), red wine, cola, coffee and tea separately at 37°C for 1, 4 or 12 weeks. Results are presented on which the color changes of dental base resin materials were associated with different denture base resins, soak solutions and storage times. We found that most of the dental resins became darker at prolonged immersion time. Heraeus resins showed more significant changes after soaking in red wine for 12 weeks, and its water absorption and solubility values were also greater than those of the other three types of resins. The color changes of New Century, Nissin and BASIS-HI soaked in the four solutions were relatively stable. The information obtained here will help optimize maintenance of dentures and also inform choice of denture materials.

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Effect of Staining Solutions on the Color Stability of Conventional and Bulk Fill Nanohybrid Resin Composites: A Spectrophotometric Analysis

Journal of Operative Dentistry & Endodontics ◽

10.5005/jp-journals-10047-0024 ◽

2017 ◽

Vol 2 (1) ◽

pp. 1-5 ◽

Cited By ~ 1

Author(s):

Jayaprakash Thumu ◽

Anirudh Kadiyala ◽

Indira Priyadarshini Bollu ◽

Srinidhi Vishnu Ballullaya ◽

Srihari Devalla

Keyword(s):

Color Change ◽

Color Stability ◽

Spectrophotometric Analysis ◽

Resin Composites ◽

Water Control ◽

Group Iii ◽

Color Changes ◽

Group I ◽

Immersion Period ◽

Friedman's Test

ABSTRACT Aim This study is aimed to evaluate the effect of staining solutions on the color stability of bulk fill and conventional nanohybrid resin composites (RCs) when subjected to various immersion periods. Materials and methods A total of 120 cylindrical Teflon molds (4 × 4 mm) were obtained and divided into four groups of 30 each. Molds of groups I and II were filled with Tetric N Ceram Bulk Fill (Ivoclar Vivadent, Schaan, Liechtenstein) and Filtek Bulk Fill (3M ESPE, St. Paul, MN, USA). Molds of groups III and IV were filled with Tetric N Ceram (Ivoclar Vivadent) and Filtek Z250 XTE (3M ESPE) incremental fill RC. Photo-activation was performed and specimens were incubated. Spectrophotometer analysis was done according to Commission Internationale d'Eclairage Lab color scale. After taking the baseline measurements, 10 samples from each group were immersed in distilled water (control, subgroup a), tea (subgroup b), and coffee (subgroup c) respectively, for 1, 7, and 30 days. The color values of each specimen were remeasured and color change value (E*ab) was calculated after 1, 7, and 30 days. Data were analyzed by Friedman's test and Mann–Whitney U-test; p < 0.05 is considered to be statistically significant. Results Group III specimens showed perceptible color changes at 30-day immersion period in coffee and tea. In group I specimens, color changes were perceptible at 7- and 30-day immersion periods in coffee and only 30-day immersion period in tea. Groups II and IV specimens showed perceptible color changes after all immersion periods in coffee and after 30 days in tea. Conclusion It can be concluded that Tetric N Ceram has less color change than the other nanohybrid RCs investigated when immersed in coffee and tea after various immersion periods. How to cite this article Thumu J, Kadiyala A, Bollu IP, Ballullaya SV, Devalla S. Effect of Staining Solutions on the Color Stability of Conventional and Bulk Fill Nanohybrid Resin Composites: A Spectrophotometric Analysis. J Oper Dent Endod 2017;2(1):1-5.

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