Abstract
OBJECTIVE: The objective of this investigation was to assess and compare the fracture resistance of roots filled with AH Plus, Total Fill and AH Plus bioceramic sealers using single cone, warm vertical compaction (WVC), and soft-core techniques. METHODS: This study utilized the palatal root canals of eighty extracted human maxillary first molars. All roots were sectioned to maintain a uniform root length of 11 mm. The samples were mechanically prepared using EdgeFile X7 rotary files to size 40/0.04. Eight teeth were left unfilled as a control group, while the remaining teeth were classified into three primary categories according to the sealer utilized for obturation; AH plus, TotallFill and AH Plus Bioceramic (BC). Each group was divided into three subgroups (n = 8) based on the obturation technique; single-cone, WVC and soft-core. Every tooth was set into blocks of acrylic resin, and a universal testing equipment (Instron Corp) with a metal-like spreader tip was used to measure the fracture force at a speed of 0.5 mm/min. The collected data were examined utilizing ANOVA, succeeded by Tukey's test. RESULTS: The control group's fracture resistance values were significantly less than the obturated groups in study. Overall, the fracture resistance of AH Plus and AH Plus BC were significantly higher than that of Total Fill BC sealers. The WVC and soft-core were significantly higher than single cone techniques. The obturation technique did not significantly influence the fracture resistance of AH Plus and Total Fill. While the fracture resistance of AH Plus BC was significantly impacted., WVC was significantly higher than single cone group. When roots were obturated with WVC technique, AH Plus BC exhibited statistically significant higher values of fracture resistance than AH plus and Total Fill. There was no significant difference between the three sealers when single cone and soft-core were used. CONCLUSION: According to this in vitro investigation, Obturation with AH Plus and AH Plus BC sealers enhanced the fracture resistance of the roots more significantly than TotalFill BC sealer, while obturation with WVC and soft-core yielded greater fracture resistance compared to the single cone approach. (EEJ-2024-11-170).