Push-out bond strength of three different calcium silicate-based root-end filling materials after ultrasonic retrograde cavity preparation
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The aim of this study was to evaluate the bond strength of three calcium silicate-based root-end filling materials.
Materials and methods
The root canals of 30 single-rooted teeth were endodontically treated; their root ends were resected and root-end cavities were prepared using ultrasonic tip. The teeth were randomly divided into three groups according to the material: (1) Micro-Mega mineral trioxide aggregate (MM-MTA), (2) Biodentine, and (3) TotalFill root repair material (RRM). Push-out test was performed using universal testing machine, and failure mode was analyzed by stereomicroscope. The data were statistically analyzed using Kruskal-Wallis and Man-Whitney post hoc tests. All p values < 0.05 were considered significant.
TotalFill RRM exhibited significantly higher bond strength (12.69 MPa) than Biodentine (9.34 MPa, p = 0.023) and MM-MTA (7.89 MPa, p = 0.002). The difference between Biodentine and MM-MTA was not significant (p = 0.447). Mixed failures were the most noted in all three groups. MM-MTA had more adhesive failures than Biodentine and TotalFill, and no cohesive failures, but without statistical significance (p = 0.591).
The bond strength was the highest for TotalFill RRM.
In order to provide a persistent apical seal, root-end filling materials should resist dislodgement under static conditions, during function and operative procedures. TotalFill RRM exhibited higher bond strength to dentin than MM-MTA and Biodentine.
KeywordsBiodentine MM-MTA Push-out test Root-end filling materials TotalFill RRM
This work was supported by a grant from the University of Zagreb, Croatia, in 2014.
Compliance with ethical standards
Conflict of interest
The authors declare that they have no conflict of interest.
This article does not contain any studies with human participants or animals performed by any of the authors. The article contains in vitro studies on human teeth where the extraction was indicated. The research was approved by the Ethical Committee of the School of Dental Medicine, University of Zagreb.
The participants signed the informed consent allowing the usage of their teeth in the study.
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