Comparison of Different Obturation Techniques in the Dentinal Tubule Penetration of EndoSequence® Bioceramic Sealer HiFlow™: An In-Vitro Study

Background This study aimed to assess the dentinal tubule penetration of bioceramic sealer (DTPB) using EndoSequence® Bioceramic Sealer HiFlow™ (BCHF). Three obturation techniques were compared, namely, single cone (SC), cold lateral condensation (CLC), and warm vertical compaction (WVC) using scanning electron microscopy (SEM). Methodology A total of 45 intact mandibular premolars were decoronated, instrumented, and irrigated with uniform procedures. Subsequently, they were randomly assigned into the following three groups according to the gutta-percha and BCHF obturation technique: Group 1 (n = 15) with the SC technique, Group 2 (n = 15) with the CLC technique, and Group 3 (n = 15) with the WVC technique. Afterward, the roots were sectioned at three levels (coronal, middle, apical) from the apex and examined using SEM to determine the maximum distance of DTPB in µm. The collected data were analyzed using SPSS software (IBM Corp., Armonk, NY, USA) using the one-way analysis of variance test and Bonferroni tests. The level of significance was set at α of 0.05. Results Significant differences were observed in the maximum distances of DTPB values among the three levels across groups (p < 0.05). Both the WVC and CLC groups exhibited higher values compared to the SC group (p < 0.05). Specifically, the DTPB maximum distance at the apical third was significantly higher in the CLC group than in the WVC and SC groups (p < 0.05). Additionally, the coronal third in each group demonstrated significant DTPB maximum distance (p < 0.05) compared to the other groups. Conclusions BCHF with the WVC and CLC obturation technique showed the best performance in DTPB maximum distance values at the three levels.