Evaluation of Shear Bond Strength of Self-Adhering Flowable Composite to Mineral Trioxide Aggregate and Biodentine

Abstract

Purpose: This study aimed to evaluate shear bond strength of mineral trioxide aggregate and biodentine to self-adhering flowable composite. Materials and Methods: eighty Double Split Teflon mold has been prepared with a central hole measuring (3mm in diameter and 2 mm in height) for the mold used for tested materials and (2mm in diameter and in height) for the other mold used for restorative material. The molds were filled with MTA and Biodentine. The mixing material MTA and biodentine applied to its mold (n = 40) and allocated into 2 groups. The specimens will store for 72 hours at 37˚C and 100% humidity. After 72 hours, self-adhering flowable composite was applied over MTA and Biodentine with a height and diameter each of 2 mm. The samples were stored in Incubator for 24 hours at 37˚C to enhance setting and then removed from the mold. SBS was measured in a universal testing machine with a load cell of 5kN and a crosshead speed of 0.5 mm/min. Data were analyzed using Graph Pad Instat. A value of P < 0.05 was thought statistically significant. After homogeneity of variance and normal distribution of errors had been confirmed, student t-test was done for compared pairs. Chi square test was performed for failure mode analysis. Results: self-adhering flowable composite-Biodentine groups showed non significantly higher SBS values than the group made of self-adhering flowable composite-MTA (P > .05). Conclusion Biodentine exhibited higher SBS than MTA; therefore, they could be preferred under flowable composites.

Effect of Different Adhesive Strategies on the Microshear Bond Strength of Calcium-Silicate-Based Materials

“…There are studies in the literature with different results regarding the μSBS of FC to Biodentine and MTA. 1,[34][35][36] Although the μSBS values for Biodentine were higher than those for MTA according to this study's results, there was no statistically significant difference in the μSBS of FC and acid-etched SARC to BIOfactor MTA. In a study that aimed to evaluate the SBS of a SARC and FC to MTA, Biodentine, and a calciumenriched mixture (CEM), researchers found that the SBS values for MTA were higher than those for Biodentine, and the difference between these materials was statistically insignificant.…”

“…34 On the contrary, other studies have reported higher SBS values for Biodentine than for MTA. 35,36 In this study, Biodentine had the highest μSBS values in all adhesive strategies. The differences in μSBS were attributed values to the different characteristics of the materials and acid-etching applications.…”

“…34 On the contrary, other studies have reported higher SBS values for Biodentine than for MTA. 35, 36…”

The Effect of Blood Contamination on Shear Bond Strength of Calcium Silicate-Based Pulp Capping Materials

“…Although there are many studies in the literature investigating the bond strength of direct pulp capping materials to dental adhesives, different and contradictory results have been obtained in the bond strength of capping materials to adhesive resins after different hardening times in different studies. 19,22,30,31 However, there are different factors that can affect the bond strength of composite resins to capping materials in clinical conditions. During the restorative treatments in the clinical conditions, leakage of saliva and blood into the cavity during the different stages of restorative material applications will cause contamination of the surface and pose a risk for the bond strength of the restoration.…”

“…In a study by Abdel-Rhman et al 31 , it was proposed that MTA provided the desired impermeability after at least 72 hours and recommended waiting for 72 hours before the restoration. It was also reported that although the initial setting reaction of Biodentin takes 12 minutes after mixing powder and liquid, Biodentin gains its full physical properties after 2 weeks.…”