The Antioxidant Effect of Green Tea, Rosemary, and Their Combination on Resin Bond Strength to Bleached Tooth Structures
Journal Title: Meandros Medical and Dental Journal - Year 2020, Vol 21, Issue 3
Abstract
Objective: This study aimed to evaluate the effect of four experimental antioxidant protocols on the shear bond strength of a resin-based composite to bleached the enamel and dentin. Materials and Methods: Using extracted bovine incisors, 140 enamel/140 dentin specimens were prepared. Both enamel and dentin samples were assigned into seven groups, individually (n=20): ENC/DNC= negative control, EPC/DPC= positive control, EDR/DDR= delayed restoration, ESA/DSA= sodium ascorbate, EGT/DGT= green tea, ER/DR= rosemary and EGTR/DGTR= green tea and rosemary combination. Experimental antioxidant solutions prepared from sodium ascorbate, green tea, or rosemary extracts were applied to the bleached enamel/dentin samples in the ESA/DSA, EGT/DGT and ER/DR groups, respectively. The mixture of the green tea/ rosemary extract solutions at a 1:1 ratio was applied to the EGTR/DGTR groups to investigate possible synergistic antioxidant interaction. The shear bond strength (SBS) test was conducted at a crosshead speed of 0.5 mm/minute. Failure modes were assessed under a stereomicroscope at x40 magnification. Data were analysed statistically using Welch-ANOVA and Tamhane post-hoc tests. Results: The lowest and highest mean SBS values were obtained in the positive control groups (EPC/DPC) and negative control groups (ENC/DNC), respectively (p<0.05). Delaying of the composite resin restorations for 15 days improved bonding to the bleached enamel/dentin compared to the positive control groups (p<0.05). All the antioxidant protocols, except green tea and rosemary combination, exhibited a bonding strength that was statistically similar to that of the relevant delayed restoration groups (p>0.05). Synergistic antioxidant interaction could not be obtained in the green tea and rosemary combination protocol. Conclusion: Natural plant-derived antioxidants can be an alternative to synthetic sodium ascorbate and may enable immediate resin restorations of bleached tooth structures.
Authors and Affiliations
Süveybe Gündoğdu, Nasibe Aycan Yılmaz
Keywords
Related Articles
- EP ID EP691543
- DOI 10.4274/meandros.galenos.2020.94914
- Views 128
- Downloads 0
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