Effect of one-step polishing systems and bleaching on color of resin composites after staining (original) (raw)
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Effect of Staining Solutions on the Colour Stability of Direct Resin Composite
Pakistan Journal of Medical Research, 2012
Background: Resin-based composite dentures or teeth are used as replacement of missing teeth. Their success depends largely on their colour stability as they undergo discoloration after prolonged exposure in oral environment and therefore, need replacement for esthetic reasons. Objectives: To evaluate the colour stability of a nanofill composite resin (Filtek Z350) when exposed to different immersion media. Study design and settings: An in-vitro experimental study was carried out at Dr. Ishrat-ul-ebad Khan Institute of Oral Health Sciences and colour testing was done at Al Karam textiles limited. Materials and Methods: Forty resin-based composite specimens measuring 1 mm. of thickness and 5x5 mm. in length and breadth were prepared using a plastic sheet. Specimens were light-cured for 20 seconds from both sides and were randomized into 4 groups (n=10) according to immersion solutions: distilled water (control), coke, turmeric powder solution and coffee solution. Specimens were left immersed in these solutions for 10 days A digital spectrophotometer was used to evaluate the colour changes after 10-days and the colour differences (Δ E) were analyzed using paired t-test (p<0.05). Results: After 10 days of immersion in coffee solution, coke and turmeric powder solution specimens showed significant colour change. The turmeric powder exhibited maximum staining followed by coffee and coke. Conclusions: The composite resin was susceptible to staining by coffee, turmeric powder and coke.
The effect of different polishing systems on the discoloration of composite resins
ANATOLIAN CURRENT MEDICAL, 2025
Aims: The aim of this study is to evaluate the color stability of composite resin materials subjected to different polishing systems when exposed to commonly consumed beverages. Methods: In this study, four different composite polishing systems (Zenit, 3M Sof-Lex, Sofu, Kerr) and three types of beverages (Nescafé 3-in-1, Lipton tea bags, and distilled water) were used. A micro-hybrid resin composite (Tokuyama) was selected for the study. A total of 84 disk-shaped composite resin samples (8 mm in diameter and 2 mm thick) were prepared. The samples were divided into four main groups according to the polishing systems used, and further divided into three subgroups based on the beverage types, with seven samples in each subgroup, resulting in a total of 12 study groups. Initial color measurements, as well as measurements taken on days 1, 7, and 28, were recorded using a vita easyshade spectrophotometer. The data were tabulated and statistically analyzed using SPSS 25.0 software, employing one-way ANOVA and Tukey HSD post-hoc tests (p=0.05). Results: Examination of the 28-day staining results revealed a statistically significant difference between the results for distilled water and coffee, depending on the brand (p<0.05). Specifically, it was observed that the distilled water results for the Shofu and Zenit brands were higher compared to those of the Kerr brand, while the coffee results for the Kerr brand were higher than those of the Zenit brand. Additionally, there was a statistically significant difference among the 28-day staining results for the 3M, Kerr, Shofu, and Zenit brands (p<0.05). The results for tea from the 3M, Kerr, Shofu, and Zenit brands were observed to be higher compared to their results for distilled water and coffee. Conclusion: Within the limits of this study, the color stability of composite resin materials varied depending on the type of composite resin and polishing system used. It was determined that the Kerr Opti-Disc polishing system had the highest success rate among all systems. Additionally, it was found that frequently consumed tea caused a higher degree of color change compared to coffee. Further supportive studies should be conducted with different composite materials and polishing systems.
Evaluation of chromatic changes of a nanocomposite resin using the new whiteness index
Medicine and Pharmacy Reports, 2018
Background and aims. To evaluate the staining effects of two brands of coffee and the bleaching efficiency of two in-office bleaching methods, upon different opacities of a commercial nanocomposite.Methods. Twenty four specimens of each opacity, A3 Dentin, A3 Body and A3 Enamel, were fabricated from Filtek Supreme (3MEspe). The specimens were further divided into two groups (n=12) and were immersed in two coffee solutions (Bio Organic Coffee Bellarom, 100% Arabica, and Iulius Meinl Coffee), for 24 hours. Between the staining sessions, the specimens were stored in sterile water, at 37°C. Each group was further divided into three (n=4), in order to be bleached, as follows: Group 1 - Beyond 35% in office, for 4 applications of 15 minutes each, Group 2 – Zoom Day White 6% in office, for 4 applications of 15 minutes each, Group 3 – Control Group, stored in sterile water. Color values were measured with a dental spectrophotometer Vita EasyShade 4.0 and five measurements were recorded for ...
Influence of Polishing Systems on Color Stability of Dental Composite Resins: An In Vitro Study
Ana Francisco, Tania Dey, José Manuel Mendes, Arnaldo Sousa, Orlanda Torres (2024). Influence of polishing systems on color stability of dental composite resins: An in vitro study. Journal of Research in Dental and Maxillofacial Sciences 9 (3), 193-203., 2024
Background and Aim: There is a growing demand for esthetic dental treatments with composite resins like Ceram.x Spectra TM ST ® (CS) due to the importance of a beautiful smile; but color change may occur affecting the longevity and quality of composite restorations. The purpose of this study was to evaluate the color stability of a composite resin, subjected to two different polishing systems, after immersion in different coloring solutions (common beverages). Materials and Methods: Forty specimens were fabricated from CS nanoceramic composite resin and polished with Enhance ® and Astropol ® finishing and polishing systems. The CIE L*a*b* color parameters were measured before and after immersing the specimens in coffee, red wine, and Coca-Cola. The chromatic difference was assessed by calculating the ∆E. Two-way ANOVA was applied to compare the ∆E values based on the type of polishing system, coloring solution, and their interaction. Results: Astropol ® resulted in better color stability and smoother surfaces than Enhance ®. Wine and coffee significantly changed the color stability of tested composite resin (P<0.05), while Coca-Cola did not affect the color stability (P>0.05). Conclusion: The choice of dental finishing and polishing system affects the color stability of CS composite resin following exposure to commonly consumed drinks.
Materials
The purpose of this study was to evaluate the color stability of repaired aesthetic restorative resin matrix materials after immersion in coffee and the effect of polishing systems after staining. One hundred and eighty cylindrical discs (8 mm × 2 mm) were prepared using a conventional nano-fill resin composite (Clearfil Majesty Esthetic A2 shade) with round cavities (3 × 1 mm). Cavities were repaired by three resin composite materials: Clearfil Majesty Esthetic A2 shade, one-shaded nano-fill resin composite (Omnichroma) and group-shaded nano-hybrid resin composite (Optishade, medium shade). Each group was polished with three polishing systems (n = 20); aluminum oxide (Soflex Spiral Wheels, 3M ESPE), silicon carbide (Occlubrush, Kerr, CA, USA) and diamond particulate (Twist Dia Spiral Wheels, Kuraray, Okayama, Japan). Color change (ΔE00) measurements were performed with a spectrophotometer at the baseline. Half of the polished samples were either kept in distilled water or immersed ...
2022
Aim: The present study aims to assess the color stability of nanofilled composite resin polished using three different polishing systems (Sof-lex, Enhance, and mylar strip) and stained with commonly consumed discoloring agents (tea, dal, and Coca-Cola) in India. Materials and Methods: 120 Disc-shaped samples were prepared and divided into polishing groups, with each group subjected to specific polishing procedures. After baseline measurements, samples were immersed in staining solutions, and color differences were measured by a spectrophotometer to assess discoloration. Results: Statistical analysis revealed significant staining differences among the polishing groups (P<0.001 by ANOVA). Group 3 (Enhance) exhibited higher staining compared to Group 2 (Sof-Lex). Dal caused significantly greater staining compared to other agents in all groups. The staining potential of beverages ranked as Dal > Tea > Distilled water ≥ Coca-Cola. Conclusion: This study highlights the impact of polishing systems on the color stability of nano-filled composite resin restorations when exposed to common discoloring agents. The findings underscore the importance of selecting appropriate finishing and polishing techniques to mitigate discoloration risks, particularly in the context of varied staining potentials of different agents. This knowledge contributes to improving clinical practices for enhancing the longterm aesthetic outcomes of composite resin restorations in dental applications.
European journal of dentistry
To evaluate the color stability of different esthetic restorative materials after surface finishing/polishing with different procedures. All materials were polymerized into silicone rubber rings to obtain specimens identical in size. Samples were randomly assigned into four groups (10 specimens of each composite for each group), and they were finished with different procedures: Control group (Group 1), three or two polishers interspersed with diamond grit (Groups 3 and 2, respectively), and one tungsten carbide bur + one polisher interspersed with diamond grit (Group 4). After staining process in coffee, a colorimetric evaluation according to the CIE L*a*b* system was performed by a blind trained operator at 7, 14, 21, and 28 days. Shapiro-Wilk test and Kruskal-Wallis analysis of variance were applied to assess significant differences among restorative materials. Means of the different polishing/finishing groups were compared with Scheffe's multiple comparison test at the 0.05 l...
Color Stability of Resin Composite Restorative Materials Finished/Polished with Different Systems
https://www.ijhsr.org/IJHSR\_Vol.8\_Issue.7\_July2018/IJHSR\_Abstract.011.html, 2018
Objective: To evaluate the effect of three different polishing systems on color stability of microfill, nanofill, and nanohybrid resin composites. Materials and Methods: A total of 120 resin composite discs were prepared in split Teflon mold with dimension of 10 mm diameter and two mm thick. Specimens were equally divided into three groups according to restorative materials (microfill composite A, nanohybrid composite B and nanofill C); 40 specimens for each material (n=40). Ten specimens from each restorative material were remained without finishing/polishing and used as a control group. Color measurement of all specimens (unpolished, polished) were recorded before & after mechanical tooth brushing by spectrophotometer. Results: There was statistically significant difference among the tested composite materials and polishing method (P <0.001). The nanofilled resin composite and the liquid polisher presented the least ΔE values. After tooth brushing, mean ΔE values was increased for three tested resin composite. Conclusion: Nanofilled composite and liquid polisher showed the least color change between the tested resin composites and polishing systems.
2011
To investigate the effect of bleaching and staining solutions on roughness and shade changes in a nanofilled resin composite [Filtek Supreme (FS)]. Methods: FS specimens (n= 135) were light cured and separated into groups (n=45) that were bleached with 10% carbamide peroxide (CP) agent or 16% or 35% hydrogen peroxide (HP). In the first two groups the bleaching gel was used for 4 hours a day, during 14 days, and for the third group in three sessions of 45 minutes. Each group was subdivided (n=15) and immersed in coffee, red wine or distilled water for 3 hours a day during 40 days. The roughness values (Ra) and shade (parameter CIELab) were evaluated at baseline, after bleaching and after staining. The data was analyzed by ANOVA and Tukey test or Kruskal Wallis. Results: The effects on specimens varied depending on the bleaching product and staining solution. FS after bleaching and after staining presented higher roughness. In the evaluation of shade changes after bleaching, it was observed that resin color changed and that 35% hydrogen peroxide bleached the resin more than the others. After staining in three solutions, all specimens changed color and wine showed the higher staining capacity. (Am J Dent 2011;24:245-249).