Effect of Silver Diamine Fluoride and Potassium Iodide Application on the Microhardness and Shear Bond Strength of Resin Composite to Enamel and Dentin - An In Vitro Study.

AIM

To evaluate the effect of the application of silver diamine fluoride-potassium iodide on the microhardness and shear bond strength of composite resin complex to enamel and dentin.

MATERIAL AND METHOD

Extracted premolars were processed and sectioned to expose flat enamel and dentin surfaces. Group 1 was the Enamel group and Group 2 was the Dentin group which were further categorized into sound and demineralized subgroups, with and without SDF+KI application. The samples were then mounted in self-curing acrylic resin and composite buttons were built over the flat surfaces of each subgroup. Half of the total samples were subjected to shear bond strength using a Universal testing machine and another half was subjected to microhardness testing using Vickers microhardness testing machine. Inter-subgroup comparison among enamel and dentin samples for microhardness and shear bond strength was carried out using one-way ANOVA and post hoc Tukey's analysis. The level of significance was predetermined at ≤0.05.

RESULTS

The groups with SDF+KI application showed an increase in the shear bond strength while improved microhardness of the enamel and dentin samples was observed. There was a statistically significant difference between the shear bond strength values and microhardness among the subgroups of enamel and dentin (P < 0.05).

CONCLUSION

The application of SDF+KI improved the shear bond strength of the resin composite and enhanced the microhardness of the enamel and dentin.