The effect of bleaching of teeth on the bond strength of brackets: An in vitro study

• Main Authors: Shiji Kunjappan, Vadivel Kumaar, Prithiviraj, Vasanthan, Syed Altaf Khalid, Joseph Paul
• Format: Article
• Language: English
• Published: Wolters Kluwer Medknow Publications 2013-01-01
• Series: Journal of Pharmacy and Bioallied Sciences
• Subjects: Bond strength; debonding; shear bond strength
• Online Access: http://www.jpbsonline.org/article.asp?issn=0975-7406;year=2013;volume=5;issue=5;spage=17;epage=20;aulast=Kunjappan

Aim: To determine the reversal effect of 10% sodium ascorbate, on the bond strength of previously bleached teeth with hydrogen peroxide. Materials and Methods: Sixty extracted maxillary premolars were selected and they were divided randomly into three groups. Group A teeth were etched and bonded; Group B bleached, etched and immediately bonded; Group C was subjected to bleaching, followed by treatment with 10% sodium ascorbate solution, then etched and bonded; Then all the three groups were subjected to testing procedure for bond strength. Results: The bond strength analysis was carried out by using instron, universal testing machine. In this study Group A had the maximum bond strength of 12.24 Mpa followed by Group C 11.62 Mpa and Group B 10.96 Mpa. Conclusion: Group C the experimental group which was treated with 10% sodium ascorbate following bleaching with 35% hydrogen peroxide provided higher bond strength compared to Group B which was bonded immediately after bleaching even though it was not statistically significant.