COMPARISON OF SHEAR BOND STRENGTH OF MOISTURE INSENSITIVE PRIMER AND CONVENTIONAL PRIMER

Abstract

 There are controversial results in the published literature about the use of primers on bonding strength of orthodontic brackets. The purpose of this study was to compare the mean shear bond strength of orthodontic brackets cured with or without the prior application of primer resins. Sixty extracted first premolars were included. In group MP, 30 teeth were cured using standardized bonding protocol including application of moisture insensitive primer resin while 30 teeth in group P were cured using standardized bonding protocol, including a step of application of conventional primer resins. Later on bonding strength was measured using universal testing machine and students t-test was used for comparison of bond strength in both the groups. Results revealed that although bond strength values were higher in MP group but statistically insignificant differences were found in bond strength in both the groups (p 0.079). It is concluded that there is no statistically significant difference in the shear bond strength of orthodontic brackets cured with moisture insensitive primers or with conventional primers in our present study.