Comparative Evaluation of Shear Bond Strength of Microfilled and Nanofilled Composite Resin Cured Under Light Emitting Diode (Led): An in Vitro Study

Abstract

Aim And Objectives: The Present Study Was Aimed To Evaluate And Compare The Shear Bond Strength Of Nanofilled And Microfilled Composites Polymerized Using LED Curing Light. Materials And Method: Forty Non-Carious, Extracted Human Premolar Teeth Were Obtained And Divided Into Two Groups According To The Type Of Restorative Composite Used. Group 1 – (N=20) Microfilled Composite Cured Using LED Light. Group 2– (N=20) Nanofilled Composite Cured Using LED Light. Composite Was Bonded To The Prepared Tooth Surface In The Form Of A Cylinder. The Shear Bond Test Was Performed Using Universal Testing Machine (Instron, USA) At A Cross Head Speed Of 5 Mm Per Minute. Results: The Mean Shear Bond Strength Was 19.92mpa For Group-1 And 21.07mpa For Group-2. Two Sample T Test Showed No Significant Difference (P > .05) Between Groups 1 And 2. Conclusion: Nanofilled And Microfilled Composites Have Adequate Shear Bond Strength And Hence, Both Materials Can Be Used Satisfactorily To Restore Dental Defects.