Push - out bond strength of intra - orifice barrier materials: Bulk - fill composite versus calcium silicate cement

Abstract

Background. The aim of this study was to compare the push - out bond strengths of calcium silicate - based ProRoot MTA and Biodentine cements and SureFil SDR and EverX Posterior bulk - fill composite resins. Methods. Twenty - four single - rooted maxillary central incisors were sectioned below the cementoenamel junction, and the root canals were instrumented using rotary files. Thereafter, a parallel post drill was used to ob tain a standardized root canal dimension. The roots were randomly assigned to one of the following groups with respect to the intra - orifice barrier used: ProRoot MTA; Biodentine; SureFil SDR; EverX Posterior. Five 1 - mm - thick sections were obtained from the coronal aspect of each root. Push - out bond strength testing was performed and data were analyzed with Kruskal - Wallis and post hoc Dunn tests ( P <0.05). Results. SureFil SDR and EverX Posterior bulk - fill composite resins’ bond strengths were significantly h igher than ProRoot MTA and Biodentine calcium silicate cements. However, no statistically significant differences were observed between bulk - fill composite resins values and calcium silicate cement values. Conclusion . Within the limitations of present stud y, calcium silicate - based ProRoot MTA cement’s push - out bond strength was lower than those of Biodentine, SureFil SDR and EverX Posterior materials.

Keywords

• Bulk - fill composite
• calcium silicate
• push - out