Aims: In–vitro comparison and measurement of bond strengths between the direct bonding technique and the three different indirect bonding systems (Single vacuum form, Glue gun, polyvinyl siloxane).
Materials and Methods: 120 extracted human premolar specimens were mounted on acrylic stubs. These were equally divided into four groups: Direct bonding group, Single vacuum form (Bioplast) group, Glue gun group, and polyvinyl siloxane (Putty) group. The shear debonding force was measured using an Instron universal testing machine and comparatively evaluated for all the groups.
Results: One-way ANOVA showed a statistically significant difference in the mean bond strength values in various groups with the highest bond strength in Direct bonding and the least in Glue Gun with P-value < 0 xss=removed>
Conclusion: The in-vitro shear bond strengths of all the indirect bonding techniques (Thomas Technique, Glue gun technique and modified polyvinyl siloxane tray technique) were adequate and comparable to direct bonding technique.
Keywords: Indirect bonding, Bond strength, Vacuum form, Glue gun, Poly-vinyl siloxane
