ABSTRACT
Objective: to evaluate the shear bond strength of ninth generation self- adhesive resin as an orthodontic bracket bonding vement, second to analyze its bonding potential on the bleached enamel surface and third is to determine the appropriate time of bracket bonding after tooth bleaching is performed
Methods: sixty extracted teeth between the 13-25 age group were divided into three groups. [n=20]. Group one was a non - bleached control group. Group two was bleached and bonded on the same day. While group three was bleached two weeks prior to bracket bonding. Mechanical de bonding was performed at universal testing machine at the cross head speed 1mm/sec
Results: shear bond strength for group 1[ 7.72 +/- 2.56MPa] and group 3 [5.08 +/- 2.09MPa] was significantly higher [p<0.001] than the group 2 [2.86 +/- 0.94MPa]. The post hoc test showed the significant difference between groups [p= 0.001]
Conclusion: self adhesive resin may ease the placement of orthodotic bracket being less technique sensitive and time saving and can be employed as an orthodontic bonding agent