Effect Of A Bond Enhancing Agent Upon Shear Bond Strength Of Self Cure Direct Bonding Orthodontic Resin On Dry And Wet (Saliva Contaminated) Enamel - An In Vitro Study

2013 
Introduction: Bonding to surface enamel is a multi-step process whereby a variation at any of the steps may affect the ultimate strength of the bond. The present study was carried out to determine the effect of a bond enhancing agent upon the shear bond strength of a self cure direct bonding agent on dry and wet (saliva contaminated) enamel. The aim of the study was to determine the efficiency of bond enhancing agent used in the direct bonding. Materials And Method: 80 upper first premolar direct bonding preadjusted edgewise brackets (022 slot) of the same manufacturer were used. 80 extracted upper first premolar teeth were embedded in acrylic moulds and were randomly divided for the purpose of testing in to 4 groups of 20 teeth viz. Group IA: bonding on dry uncontaminated enamel surface using RELY-A-BOND. Group IB: bonding on dry uncontaminated enamel surface after applying "ENHANCE"(bond enhancing agent) using RELY- A- BOND. Group IC: bonding on wet (saliva contaminated) enamel surface using RELY- A-BOND. Group ID: bonding on wet (saliva contaminated) enamel surface after applying ENHANCE (bond enhancing agent) using RELY-A-BOND.INSTRON TENSILE TESTING Machine was used to determine shear bond strength. The comparison of the samples' means was carried out using student 't' test. Result: the result of the study shows that statistically significant positive correlation using enhance in wet enamel surfaces. Conclusion: Use of bond enhancing agent has no role in dry bonding conditions however bond strength increases significantly when used under moisture contaminated conditions.
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