Effect of newer antioxidants on the bond strength of composite on bleached enamel

• Main Authors: M Manoharan, K K Shashibhushan, P Poornima, Sathyajith N Naik, Disha Patil, A S Shruthi
• Format: Article
• Language: English
• Published: Wolters Kluwer Medknow Publications 2016-01-01
• Series: Journal of Indian Society of Pedodontics and Preventive Dentistry
• Subjects: Antioxidants; bleaching; composite; proanthocyanidin; shear bond strength; sodium ascorbate gel
• Online Access: http://www.jisppd.com/article.asp?issn=0970-4388;year=2016;volume=34;issue=4;spage=391;epage=396;aulast=Manoharan
• ISSN: 0970-4388; 1998-3905

Aim: The study aims to evaluate the effect of the application of two antioxidants on the bond strength of composite resin to bleached enamel. Materials and Methods: Eighty enamel surfaces were obtained from forty human extracted premolars. Specimens were randomly divided into four groups (n = 20). Group 1: No bleaching (control); Group 2a: Bleaching with 15% carbamide peroxide gel; Group 2b: Bleaching, followed by application of 10% sodium ascorbate gel; Group 2c: Bleaching, followed by application of 5% proanthocyanidin agent. Surfaces were etched followed by application of total etch bonding system, and composite resin cylinders were bonded. Specimens were tested for shear bond strength. Statistical Analysis Used: One-way analysis of variance was used for multiple group comparison and post hoc Tukey′s test for individual group-wise comparison. Results: Significantly higher shear bond strength values were observed in Group 2c and 2b as compared with Group 1 and 2a (P < 0.05). Among the antioxidants, Group 2c showed significantly higher shear bond strength values than Group 2b (P < 0.05). Conclusion: It can be concluded that the use of antioxidant before bonding procedures on bleached enamel completely neutralizes the deleterious effects of bleaching and increases the bond strength significantly.