Investigating the effect of the type of endodontics sealer on the strength of the post fiber bond to the tooth root canal in a laboratory environment

Recently, MTA-based sealers have been introduced to achieve biological properties and tissue compatibility and high sealing strength. However, few studies are available on the effect of bioceramic-based sealers, including CeraSeal, on fiber post bonding strength. This study was conducted with the aim of investigating the effect of the type of endodontic sealer on the bond strength of the fiber post to the root canal in a laboratory environment at the Faculty of Dentistry of Azad University of Tehran in 2021.

 In this laboratory and in vitro study, a total of 30 maxillarysingle canal anterior teeth that were extracted due to periodontal reasons were included in the study, Cereseal, MTA Fillapex, Ah plus sealers were randomly placed in 3 groups of 10. The canals were filled with gutta-percha (Ariadent, Tehran, Iran) by cold lateral compression method. The samples were kept at 37°C and under 100% relative humidity for 7 days. The gutta percha was removed from the root canals by piezoreamer number 2 so that at least 5 mm of gutta remained at the end of the canals. Then the space of the post was prepared for the RTD fiberpost by special drills, and at the end the fiberposts were cemented using panavia f2 dual cure resin cement.24 hours after placing the samples in incubator, a diamond disk was used to prepare 1 mm thick cross-sections from the coronal third of the samples in disk form. Finally, the bond strength was measured by push-out technique in each tooth piece with the formula P=F/A. For data analysis, one way Anova test was used in SPSS version 22 software.

 The results showed that there is a significant difference in the bond strength of the fiber post to the root canal based on the type of sealer. The bond strength of the fiber post to the root canal in AH plus sealer was higher than MTA fillapex and Ceraseal sealer (P < 0.0001), but there was no significant difference in the bond strength of fiber post to the root canal in MTA fillapex and Ceraseal sealer (P= 0. 5).

 The bond strength of fiber post to root canal in epoxy resin based sealers is higher than MTA and bio ceramic based sealers.