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The effect of bleaching of teeth on the bond strength of brackets: An in vitro study
Shiji Kunjappan1, Vadivel Kumaar, Prithiviraj
1Department of Orthodontics and Dentofacial Orthopedics, Vinayaka Missions Sankarachariyar Dental College, Salem, Tamil Nadu, India.
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.
