COMPARISON OF SHEAR BOND STRENGTH OF DIFFERENT LIGHT CURE ORTHODONTICS ADHESIVES

The aims of the current study were to evaluate and compare bond strength of two conventional light cure adhesives and one reinforced glass ionomer cement. Thirty extracted human premolars were randomly divided into 3 groups. Premolar brackets were bonded to the tooth specimens in each group with their respective adhesive according to the manufacturer’s instructions. All specimens were stored in distilled water in sealed containers and placed in an incubator at 37o C for 24 hours before shear bond strengths were tested. Analysis of variance was used to compare the three adhesives. A One-way analysis of variance and Tukey multiple comparison test were used to determine statistical significance differences between groups. The present findings indicated that the mean bond strength of two light cure adhesives ranged between 15.21 and 16.39 MPa while mean bond strength of reinforced glass ionomer cement was 7.16 MPa. The results of variance analysis showed that there were statistical significant differences in the bond strength among the 3 groups. Tukey multiple comparison test indicated that these differences took root from reinforced glass ionomer cement which has the weakest bond strength in our study. It was concluded that adhesives tested in this study would be adequate for routine clinical use.