Shear Strength of Adhesives Based on Solvent Type, Aged, and LED-cured with Different Wavelengths: An Study.

Objective: To evaluate the shear strength of adhesives based on the type of solvent (ethanol and acetone), aged and light-cured using light-emitting diode (LED) units with different wavelengths. Polywave and monowave LED units were employed for this study.

Materials And Methods: Ninety bovine tooth samples were analyzed using OptiBond Universal adhesive (acetone) and single bond universal adhesive (ethanol). The samples underwent an aging process before being light-cured with different programs of polywave LED units (high-power, low-power, soft start) and monowave. Shear strength was measured using an Instron® Universal testing machine, with statistical analysis performed using ANOVA and the student's -test.

Results: The adhesive with ethanol solvent, light-cured with polywave in high-power mode, achieved an average of 11.06 MPa, while low-power and soft start modes yielded 7.23 MPa and 10.82 MPa, respectively. The adhesive with acetone solvent, light-cured in high-power mode, had an average shear strength of 14.27 MPa, compared to 12.71 MPa in low-power mode and 12.92 MPa in soft start mode. No statistically significant differences were observed between the mean shear strengths of the groups treated with polywave and monowave LED units ( > 0.05).

Conclusion: The shear strength of adhesives with ethanol and acetone solvents varies depending on the light-curing program used, but no significant differences were found between the solvents when cured with polywave and monowave LED units. The choice of solvent type and light-curing program may influence adhesion properties.

Clinical Significance: A careful selection of solvent and light-curing techniques for adhesives can enhance the quality and durability of dental restorations, improving adhesion and reducing micro leakage. How to cite this article: Medina J, Orellana-Arauco H, Chacon-Gonzales D, Shear Strength of Adhesives Based on Solvent Type, Aged, and LED-cured with Different Wavelengths: An In Vitro Study. J Contemp Dent Pract 2024;25(9):846-850.