Color Stability of Flowable Composites in Different Viscosities

Authors : Bora KORKUT, Cigdem HACIALI

Pages : 454-461

Doi:10.33808/clinexphealthsci.816231

View : 12 | Download : 8

Publication Date : 2020-12-30

Article Type : Research Paper

Abstract :Objective: This in vitro study was aimed to evaluate the color stability of resin-based composite materials in different viscosities immersed in  various colorant solutions. Methods: 250 composite samples of A2 shades were prepared using two high-viscosity flowable composites insert ignore into journalissuearticles values(G-aenial Injectable, GC, Tokyo,  Japan; Estelite Super Low Flow, Tokuyama Dental, Japan A2 shade);, a bulk-fill flowable composite insert ignore into journalissuearticles values(Filtek Bulk-Fill, 3M, USA);, a low-viscosity  flowable composite insert ignore into journalissuearticles values(Filtek Ultimate Flowable, 3M, USA);, and a packable composite insert ignore into journalissuearticles values(Filtek Ultimate, 3M, USA);. Samples were polymerized and  polished from both sides with a LED curing unit insert ignore into journalissuearticles values(Valo Grand, Ultradent, Switzerland); and polishing discs insert ignore into journalissuearticles values(SofLex, 3M, USA);. Then divided by test  groups insert ignore into journalissuearticles values(n=10 for each); regarding colorant solutions; coke insert ignore into journalissuearticles values(CocaCola Company, USA);, tea insert ignore into journalissuearticles values(Yellow Label, Lipton, Rize, Turkey);, coffee insert ignore into journalissuearticles values(Nescafe  Classic; Nestle, Switzerland);, red wine insert ignore into journalissuearticles values(Doluca, Öküzgözü, Doluca, İstanbul, Turkey);, and physiologic saline as the control solution. Samples were  discolored for 144 hours with solutions in an incubator at 37°C, and repolished after discoloration. Color measurements were performed using  a clinical spectrophotometer insert ignore into journalissuearticles values(EasyShade IV, Vita, Germany); and a colorimeter insert ignore into journalissuearticles values(ShadeStar, Dentsply Sirona, USA);. Two-way Anova test and Tukey  HSD test were used for statistical analyses. Results: Composite material and colorant solution were considered effective factors for influencing the color change, regarding after discoloration  scores insert ignore into journalissuearticles values(p<0.001, p<0.001, respectively);. In addition, colorant solution was found more effective than the type of composite. Filtek Ultimate  Flowable presented significantly the highest level of color change among others insert ignore into journalissuearticles values(p<0.001);, for both ‘after discoloration insert ignore into journalissuearticles values(5,34 ± 3,78b);’ and ‘after  repolishing insert ignore into journalissuearticles values(3,93 ± 2,23b);’ periods. No significant difference in color change was found between Gaenial Injectable, Estelite Super Low Flow,  Filtek Bulk Fill Flowable, and Filtek Ultimate, and all showed imperceptible color changes insert ignore into journalissuearticles values(∆E*<3.7);. Red wine solution showed significantly the  highest level of color change insert ignore into journalissuearticles values(8,00 ± 2,08d); among other colorant solutions insert ignore into journalissuearticles values(p<0.001);, and followed by coffee insert ignore into journalissuearticles values(4,59 ± 1,52c);, tea insert ignore into journalissuearticles values(3,38 ± 1,21b);,  and coke insert ignore into journalissuearticles values(1,58 ± 0,99a);, respectively. A strong relation was found between the spectrophotometer and colorimeter measurements. Conclusion: Viscosity was considered an effective factor for discoloration of RBCs. Color stability of high viscosity flowable composite materials  were found to be good and similar to packable composite. Samples immersed in red wine showed the greatest level of discoloration and  followed by coffee, tea, and coke. The repolishing procedure was considered effective for reversing back the surface discoloration of composite  materials.
Keywords : Discoloration, repolishing, flowable composite, viscosity, color stability