Comparative evaluation of push-out bond strength after root perforation repair using recently introduced bioceramic and calcium silicate-based materials – An in vitro study

Aim: This study was planned to comparatively evaluate the push-out bond strength (PBS) after perforation (PF) repair using mineral trioxide aggregate (MTA) repair high plasticity (HP), Biodentine, and EndoSequence Bioceramic (BC) root repair material (ERRM). Methods: Ninety freshly extracted, intact, human molars were collected. Teeth were decoronated 5 mm above the pulpal floor and the roots were amputated 5 mm below the furcation. The PF was created intentionally in the furcation area. The teeth were stabilized in self-curing acrylic resin and grouped equally based on the type of PF repair material used-group 1 (MTA repair HP), group 2 (Biodentine), and group 3 (ERRM). Each group was subdivided into two subgroups ( n = 15) based on the duration at which PBS was assessed (24 h or 7 days). The moist cotton pellet was stationed over the PF and the specimens were incubated in 100% humidity at 37°C. All specimens were subjected to PBS measurement after 24 h and 7 days. The values of PBS were recorded using SPSS 21.5 for Windows. A two-way mixed factorial analysis of variance (two-way ANOVA) was applied to test the effect of groups and time intervals on PBS. When two-way ANOVA showed a statistically significant difference among the groups, the least significant difference (LSD) post hoc test was applied for pairwise comparison. P <0.05 was considered statistically significant. Data were analyzed using GraphPad Prism version 5. Results: After 24 h, the mean of PBS in MTA repair HP, Biodentine, and ERRM groups was 4.36, 7.47, and 11.12 MPa, respectively. After 7 days, the mean of PBS in MTA, Biodentine, and ERRM groups was 7.69, 9.37, and 13.86 MPa, respectively. The ERRM showed higher PBS followed by Biodentine and MTA Repair HP at 24 h and 7 days of setting time, respectively. Conclusion: The EndoSequence BC RRM Fast-Set Putty showed substantial functioning as PF repair material in vitro and can be a very good alternative to MTA HP and Biodentine as PF repair material.