Indian Journal of Dental Research

ORIGINAL RESEARCH
Year
: 2019  |  Volume : 30  |  Issue : 1  |  Page : 112--116

Comparative evaluation of effects of natural antioxidants on the shear bond strength of composite resin to bleached enamel


Ritu Rana, Mamta Kaushik, Roshni Sharma, Pallavi Reddy, Neha Mehra 
 Department of Conservative Dentistry and Endodontics, Army College of Dental Sciences, Secunderabad, Telangana, India

Correspondence Address:
Dr. Ritu Rana
Department of Conservative Dentistry and Endodontics, Army College of Dental Sciences, Jai Jawahar Nagar, CRPF Chennapur Road, Secunderabad - 500 087, Telangana
India

Context: The use of antioxidants immediately after bleaching showed increased bond strength. Aims: This study aimed to compare the effects of natural antioxidants on the shear bond strength of composite resin to bleached enamel. Materials and Methods: Fifty extracted single-rooted upper incisors were decoronated by sectioning the roots 2 mm below the cementoenamel junction, and then, crowns were embedded in autopolymerizing acrylic resin block (3.0 cm × 3.0 cm × 3.0 cm) with the labial surface exposed. They were randomly divided into five groups, depending on the type of antioxidant used (n = 10): (i) Group 1: control (no bleaching), (ii) Group 2: bleaching only, (iii) Group 3: bleaching + 10% sodium ascorbate (antioxidant), (iv) Group 4: bleaching + green tea, and (v) Group 5: bleaching + white tea. Labial surfaces of 40 teeth were bleached with 38% hydrogen peroxide for 20 min following manufacturer's instructions. After that, the experimental groups (Groups 3, 4, and 5) were treated with respective antioxidant solutions before composite restorations were done using a cylindrical plastic mold (3 mm × 5 mm). Shear bond strength of the specimens was tested under universal testing machine. Statistical Analysis: Data were analyzed with ANOVA and Tukey's post hoc test. Results: There were statistically significant differences between shear bond strength of control groups (Groups 1 and 2) and experimental groups (P < 0.05), but no significant difference in bond strength was observed among the antioxidants used. Conclusion: Application of antioxidants immediately after bleaching showed increased bond strength. Green tea and white tea extract can be used as alternative antioxidants in improving the bond strength of enamel.


How to cite this article:
Rana R, Kaushik M, Sharma R, Reddy P, Mehra N. Comparative evaluation of effects of natural antioxidants on the shear bond strength of composite resin to bleached enamel.Indian J Dent Res 2019;30:112-116


How to cite this URL:
Rana R, Kaushik M, Sharma R, Reddy P, Mehra N. Comparative evaluation of effects of natural antioxidants on the shear bond strength of composite resin to bleached enamel. Indian J Dent Res [serial online] 2019 [cited 2020 Jul 5 ];30:112-116
Available from: http://www.ijdr.in/article.asp?issn=0970-9290;year=2019;volume=30;issue=1;spage=112;epage=116;aulast=Rana;type=0