attia, R. (2021). Reversal of deleterious effect of extracoronal in- office bleaching on shear bond strength of composite resin to bleached enamel: Effect of delayed restoration and different antioxidants application - in vitro study. Egyptian Dental Journal, 67(Issue 1 - January (Conservative Dentistry and Endodontics)), 843-856. doi: 10.21608/edj.2021.49934.1347
reham attia. "Reversal of deleterious effect of extracoronal in- office bleaching on shear bond strength of composite resin to bleached enamel: Effect of delayed restoration and different antioxidants application - in vitro study". Egyptian Dental Journal, 67, Issue 1 - January (Conservative Dentistry and Endodontics), 2021, 843-856. doi: 10.21608/edj.2021.49934.1347
attia, R. (2021). 'Reversal of deleterious effect of extracoronal in- office bleaching on shear bond strength of composite resin to bleached enamel: Effect of delayed restoration and different antioxidants application - in vitro study', Egyptian Dental Journal, 67(Issue 1 - January (Conservative Dentistry and Endodontics)), pp. 843-856. doi: 10.21608/edj.2021.49934.1347
attia, R. Reversal of deleterious effect of extracoronal in- office bleaching on shear bond strength of composite resin to bleached enamel: Effect of delayed restoration and different antioxidants application - in vitro study. Egyptian Dental Journal, 2021; 67(Issue 1 - January (Conservative Dentistry and Endodontics)): 843-856. doi: 10.21608/edj.2021.49934.1347
Reversal of deleterious effect of extracoronal in- office bleaching on shear bond strength of composite resin to bleached enamel: Effect of delayed restoration and different antioxidants application - in vitro study
Associate Professor, Faculty of Dentistry Zagazig Universty, Al Sharquia, Zagazig, Egypt
Abstract
Objective:The objective of this in - vitro study was to evaluate the effect of different antioxidants in reversal of of deleterious effect of bleaching on shear bond strength of composite resin to bleached enamel.Materials and methods: Seventy bovine incisors were used. The specimens were randomly divided into seven groups (10 specimens each) as follow: Group 1: no bleaching treatment and no antioxidant application. Group 2: bleaching only without antioxidant application and immediate composite resin application after bleaching. Group 3: bleaching only without antioxidant application and delayed composite application (after 2 weeks) of storage. Group 4: bleaching and application of 10% Alpha-tocopherol.Group 5: bleaching and application of 6% cranberry extract. Group 6:bleaching and application of 10% sodium ascorbate. Group 7: bleaching and application of 10% green tea. 40% hydrogen peroxide (Opalescence Xtra Boost 40%, Ultradent, South Jourdan, UT, USA) was used. Composite resin Tetric N -Ceram was used. The shear bond strength was measured using a universal testing machine. Results: one-way ANOVA test revealed significant differences in shear bond strength among the tested groups (p < 0.001). Bond strength significantly decreased after bleaching. There was no significant difference in shear bond strength reversed using10% Alpha-tocopherol, 10% sodium ascorbate and 10% green tea and delayed restoration. Whereas the difference was significant between group 5(6% cranberry extract) and other antioxidants groups. Conclusion: The results obtained from the use of antioxidants using (10% Alpha-tocopherol, 10% sodium ascorbate and 10% green tea extract) is approximately the same as the delayed restoration.
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