Evaluation Of Push Out Bond Strength Of Different Concentrations Of Chitosan Nano Particles And Fiber Glass Particles Incorporated Composite Resin And 8th Generation Bonding Agent For Class 2 Restoration In Premolar Teeth: An In Vitro Study

Abstract

Aim and Objectives: The aim of this study is to evaluate the push-out bonding strength of class II cavities a vitro study of Premolars restored with different concentrations of chitosan nanoparticles (CSN) and fiber glass particles incorporated in universal composite resin and eighth-generation dentin bonding agent (DBA).

Methodology: Eighty human extracted Premolar teeth recently extracted for periodontal reasons were collected, cleaned with Ultrasonic Scalers (woodpecker piezo scaler UDS-J, China), and stored in distilled water and mounted in acrylic mold up to 2 mm below cementoenamel junction and mesio-occlusal Class II cavities with standard dimension. CSN 2% and 0.25% powder were added to the DBA and composite resin by VORTEX method. The specimens were arbitrary allotted into 4 groups for restorations as follows Group 1: (Control group) (no CSN) Group 2: (2% fiber glass particles + Composite) Group 3A: (2% CSN + Composite) Group 3B: (2%CSN + DBA) Group 3C: (2%CSN+ DBA+ Composite) Group 4A: (0.25%CSN + Composite) Group 4B: (0.25%CSN + Composite + DBA) Group 4 (0.25%CSN+ DBA + Composite)

Result and Conclusion: Subgroup 4A (0.25% CSN + composite) has shown an increase in bond strength among all experimental groups with no significant difference between group 1 (control group). CONCLUSION: CSN 0.25% incorporated in composite or DBA exhibits no harmful effect on the bond strength of class II restorations. Hence, it can be used to improve the antibacterial action and longevity of composite resin.