Comparative evaluation of bond strength of essential oil modified composite resin to enamel (In-Vitro)

Objectives: The aim is to evaluate the bond strength of essential oil-modified composite resin to enamel. Materials and Methods: 84 molars were embedded in acrylic molds with the buccal surfaces facing upwards, then they were divided into three groups according to the type of essential oil used (n=28): Group 1: Cinnamon oil, Group 2: Thyme oil, Group 3: Clove oil. Each group was then divided into four subgroups according to the concentration of essential oil used to modify the Flowable Composite Resin (CR) (n=7): Subgroup 1 : negative control, Subgroup 2: concentration 1µL/2g CR, Subgroup 3 : concentration 2µL/2g CR, Subgroup 4 : concentration 5µL/2g CR. plastic molds were fixed and the flowable composite was applied and cured. Finally, the shear bond strength test was conducted. Results: Mean SBS values of Cinnamon group was significantly higher than the control subgroup (P = 0.001) but this did not apply to Thyme (P = 0.189) and Clove Oil (P = 0.386) groups. The source of the significance of the SBS values in the CInnamon oil group was between the control subgroup and every experimental one. Conclusion: Mean SBS values of Cinnamon oil modified composite resin were significantly higher than the control group. Mean SBS values of Thyme oil and Clove oil modified composite resins were not significantly higher than the control group. <strong>Received: 26 January 2024</strong> <strong>Accepted: 05 July 2024 </strong> <strong>Published: 01 September 2024</strong>