Evaluation of the bond strength of tricalcium silicate based biomaterials to glass ionomer based restorative cements of different content

Aim: This study aims to comparatively evaluate the shear bond strength of tricalcium silicate-containing biomaterials to glass ionomer-based restorative cements with different contents. Material and Method: In our study, 96 standardized blocks made of polylactic acid (PLA) filament with cavities of 4 mm in diameter and 2 mm in depth were obtained with the help of a three-dimensional printer. Tricalcium silicate-containing biomaterials (NeoMTA2 and Biodentine) prepared in accordance with the instructions of the manufacturers were placed in the gaps in the PLA filament blocks, and then waited for the recommended time to harden. Biomaterial samples were randomly divided into 4 groups according to the glass ionomer-based restorative cements used in our study. These groups include high viscosity glass ionomer cement (Chemfil Rock), glass hybrid restorative material (Equia Forte HT), glass carbomer (GCP Glass Fill), and giomer (Beautifil II) containing pre-reacted glass ionomer particles. Glass ionomer restorative materials with different contents were applied on the biomaterials with the help of cylindrical molds with a diameter of 2 mm and a height of 2 mm. After all samples were kept in an oven at 37°C for 24 hours, the shear bond strength values were measured using a universal test device. Results: For all biomaterials, the highest average shear bond strength value was observed in the Beautifil ΙΙ group, and the lowest average shear bond strength value was observed in the Chemfil Rock group. The bond strength of GCP Glassfill, Equia Forte HT, Chemfil Rock restorative material groups to both biomaterials was significantly lower than the Beautifil ΙΙ restorative material group (p<0.05). Conclusion: In the light of our findings, Beautifil ΙΙ, a glass ionomer-based restorative material placed on calcium silicate-containing biomaterials used in vital pulp treatments, can be preferred as the final restoration. Key Words: Tricalcium Silicate, Biodentine, Glass Ionomer, Biomaterial, Bond Strength.