Online ISSN: 2515-8260

EFFECT OF MORINGA LEAF (MORINGA OLEIFERA LAM.) ETHANOL EXTRACT 10% AND ALPHA TOCOPHEROL 10% AS ANTIOXIDANT ON THE SHEAR BOND STRENGTH OF COMPOSITE RESIN TO ENAMEL FOLLOWING EXTRA CORONAL BLEACHING

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Vincent1 , Cut Nurliza2 , Wandania Farahanny2

Abstract

Introduction: After bleaching treatment, patients often require additional intervention for composite resin restorations. The initial composite restorations after bleaching with hydrogen peroxide (H2O2) 25-40% cannot be done immediately, due to the presence of free radical residues as a result of oxidation of the bleaching material it is recommended to delay bonding for 1-3 weeks. If the adhesive restoration are carried out immediately, the shear bond strength of the restoration would reduced. Free radicals can interfere with resin infiltration and inhibit complete polymerization. The use of antioxidants as an effective alternative treatment to overcome free radical residues and increase the shear strength of post-bleaching restorations. Alpha tocopherol is an antioxidant that has been known to bind free radicals, that adhesive action can be carried out immediately after bleaching. The potential natural resource being developed is moringa leaves (moringa oleifera lam) which is rich in antioxidants. The purpose of this study was to compare the differences in the use of antioxidants 10% alpha tocopherol and 10% ethanol extract of moringa leaves can increase the shear bond strength of the attachment in nanofilled composite restorations on teeth after bleaching with 40% H2O2. Material and methods: Twenty seven insisivus were divided into three groups. Samples were treated with bleaching treatment, group I the application of 10% alpha tocopherol antioxidant, group II with ethanol extract of Moringa leaves for 10 minutes. Group III is the group without antioxidants. Then all samples were restored with nanofilled composites. The shear bond strength was measured by a universal testing machine. The data obtained were statistically tested with one-way analysis of variance(ANOVA), while the LSD test was used to see the difference in the effect of the shear bond strength between groups. Results: The highest shear bond strength of the composite resin was in the bleaching group of 40% hydrogen peroxide and using 10% alpha tocopherol as an antioxidant, while the lowest was in the control group bleaching using 40% hydrogen peroxide and immediate restoration without antioxidants Conclusion: The application of antioxidant alpha tocopherol and ethanol extract of moringa leaves increased the shear bond strength of composite restoration to enamel following extra coronal bleaching.

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