Comparison of the Shear Bond Strengths of Two Different Restorative Materials to Biodentine and BIOfactor MTA

Objectives: The aim of this study was to compare the shear bond strengths of glass ionomer cement and flowable composite to the calcium silicate-based materials- Biodentine and BIOfactor MTA.

Materials and Methods: Biodentine and BIOfactor MTA were prepared and placed in teflon molds with a diameter of 8 mm and a height of 2 mm. Material discs were incubated at 37°C and 100% humidity for 24h. Material samples were embedded in acrylic blocks. Flowable composite (Ruby Flow, Ruby Dent, InciDental, England, Turkiye) or glass ionomer cement Nova Glass F, Imicryl, Konya, Turkiye) with 3-mm diameter and 2-mm height was applied on the calcium silicate based cements. Samples were incubated under the same conditions for 24 hours. Samples were subjected to the shear test method using a universal test machine with the loading speed of 1 mm/min. The peak force was recorded when bond failure occurred. Statistical analysis was carried out using Kruskal Wallis and Mann-Whitney U tests.

Results:A significant difference was found between the shear bond strength of BIOfactor MTA-flowable composite and Biodentine-flowable composite groups (p<0.05). There was a significant difference between BIOfactor MTA-glass ionomer cement and Biodentine glass ionomer cement groups (p<0.05). Biodentine showed higher bond strength to both materials. Both Biodentine and BIOfactor MTA showed higher shear bond strength with the flowable composite than glass ionomer cement.

Conclusion: Biodentine has higher shear bond strength to restorative materials than BIOfactor MTA. Both calcium silicate-based cements have higher shear bond strength to flowable composite.