Effects of Mismatch Between Dentin Bonding Agents and Composite Resin on Shear Bond Strength of Composite Restoration: An In Vitro Study

Abstract

Background: Adequate adhesion between the restorative material and its substrate, along with the integrity of the adhesive interface, is essential for the clinical success of restorations.

Objective: The purpose of the study was to evaluate the effect of using mismatched brands of bonding agents and restorative composite on shear bond strength of composite restoration, with emphasis on their interfacial compatibility.

Methodology: Thirty sound human premolars extracted for orthodontic purpose were collected and equally divided into control and experimental groups. Samples in the control group were restored with composite resin and bonding agents of the same brands whereas samples in experimental group were restored with composite resin and bonding agents of different brands. Composite resins and bonding agents from three brands, SDI, Itena and Dentsply were used in the study. Specimens of both the groups were subjected to shear bond strength test using universal testing machine. Statistical analysis was performed using one-way ANOVA and post hoc Tukey test.

Results: Results showed significant difference in shear bond strength of control and experimental groups. High bond strength was manifested by samples restored with similar brands of composite resin and bonding agents and low bond strength was shown by samples restored with different brands.

Conclusion: Application of different brands of bonding agents and restorative composite adversely effects the bond strength of the restoration. Clinicians should incorporate using the right brand of prescribed bonding agents with matched composite resin in clinical practice to achieve optimal bonding performance and clinical outcomes.