EFFECT OF COLLAGEN STABILIZING AGENTS ON THE SHEAR BOND STRENGTH TO DENTIN: AN IN VITRO STUDY

Abstract

Aim: This in vitro study was designed to evaluate the effect of collagen stabilizing agents on the shear bond strength to dentin. Materials and Methods: Thirty premolars were decoronated 2 mm above cemento-enamel junction and restored with composite resin to a height of 2 mm and diameter of 3.5 mm using a cylindrical teflon mould. Teeth were then randomly divided to four groups: GroupI (Control): Etching + Rinsing + bonding agent + composite (n = 10); Group II (Riboflavin): Etching + Rinsing + Pre-treatment with Riboflavin + Curing + bonding agent + composite (n=10); Group III (White tea): Etching + Rinsing + Pre-treatment with White tea + bonding agent + composite (n = 10). Samples were then subjected to thermo cycling for 500 cycles at 5° C and 55° C with the dwell time of 30 sec and transfer time of 5 to 10 sec. Then the samples were subjected to shear bond strength evaluation on universal testing machine. Shear load was applied at a cross head speed of 0.5 mm/ minute until failure occurred. The load to failure was recorded individually and statistical analysis was done. Results: Group II (Riboflavin) produced the highest mean shear bond strength when compared to white tea. Conclusion: According to this study, it can be concluded that pre-treatment by application of Riboflavin improved the shear bond strength to dentin when compared to control and white tea.