Colorimetric Assessment of Surface Sealants for Discoloration of a Nanofilled Resin Composite

Authors : Bora KORKUT

Pages : 448-453

Doi:10.33808/clinexphealthsci.808644

View : 13 | Download : 7

Publication Date : 2020-12-30

Article Type : Research Paper

Abstract :Objective: This in vitro study was aimed to assess the effect of different surface sealants on discoloration of a nonofilled resin-based composite  quantitatively, using a colorimeter. Methods: 40 specimens were prepared using nanofilled resin composite, Filtek Universal Restorative insert ignore into journalissuearticles values(A2 shade, 3M, USA);. Sprecimens were  polymerized from both sides, polished using polishing discs insert ignore into journalissuearticles values(SofLex, 3M, USA); and divided by test groups insert ignore into journalissuearticles values(n = 10 for each);, regarding the  sealant used; Permaseal insert ignore into journalissuearticles values(Ultradent Products, USA);, Biscover LV insert ignore into journalissuearticles values(Bisco, USA);, Optiglaze Clear insert ignore into journalissuearticles values(GC Corp., Japan); and control group. Samples were  discolored for 144 hours in coffee solution, and color measurements were performed using colorimeter insert ignore into journalissuearticles values(ShadeStar, Dentsply Sirona, USA);.  Nominal color codes of specimens regarding Vita Classical Shade Guide, were converted to corresponding numerical values. Level of color  change after sealant application insert ignore into journalissuearticles values(∆Vita1); and after discoloration insert ignore into journalissuearticles values(∆Vita2); were calculated. Shapiro Wilk and Kruskal Wallis tests were used for statistical analyses. Results: Color changes in Permaseal, Optiglaze and control groups were significant insert ignore into journalissuearticles values(p < 0.001); compared to Biscover, for ∆Vita1 scores.  Remarkable level of darkening was observed for all groups, for ∆Vita2 scores. Permaseal revealed significantly the highest level of darkening,  among all insert ignore into journalissuearticles values(p < 0.001);, but no difference with control group. Optiglaze showed significantly lower level of darkening compared to the control  group insert ignore into journalissuearticles values(p < 0.001);, whereas no difference with Biscover insert ignore into journalissuearticles values(p ≥ 0.05);. Biscover group showed similar level of darkening with Optiglaze and control  groups insert ignore into journalissuearticles values(p ≥ 0.05);. Conclusion: Permaseal sealant presented significantly the highest discoloration, whereas Biscover and Optiglaze sealants presented similar and l ower. Colorimeter might be determined as repeatable method for measuring discoloration in vitro.
Keywords : Sealant, Biscover, Optiglaze, Permaseal, discoloration, nanocomposite