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Push-out bond strength of three different calcium silicate-based root-end filling materials after ultrasonic retrograde cavity preparation

Objective 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.Theteethwererandomlydividedintothreegroupsa ccordingtothematerial:(1)Micro- Megamineraltrioxideaggregate (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 KruskalWallis and Man-Whitney post hoc tests. All p values <0.05 were considered significant. Results TotalFill RRM exhibited significantly higher bond strength (12.69 MPa) than Biodentine (9.34 MPa, p = 0.023) andMM- MTA(7.89MPa, p=0.002).Thedifferencebetween Biodentine and MM-MTA was not significant (p = 0.447). Mixed failures were the most noted in all three groups. MMMTA had more adhesive failures than Biodentine and TotalFill, and no cohesive failures, but without statistical significance (p = 0.591). Conclusion The bond strength was the highest for TotalFill RRM. Clinical relevance 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.

Biodentine ; MM-MTA ; Push-outtest ; Root-end filling materials ; Total Fill RRM

Department of Biomedical, Surgical, and Dental Sciences, Galeazzi Institute, University of Milan, Milan, Italy