The push out bond strength of bioceramic seal-er(Total Fill) after warm and cold obturation tech-niques An in vitro comparative

Background: The goal of a root canal treatment is three dimensional obturation with complete seal the system. aim this study was to evaluate and compare effect two warm techniques, vertical compaction (WVC) and, carrier based technique Gutta Core (GC), versus cold lateral (CLC) single cone (SC) on push-out bond strength bioceramic sealer (Total Fill) at different levels. Materials Methods: Forty extracted maxillary first molars teeth straight round palatal mature apices were selected for study. After sectioning roots 11 mm from apex, canals prepared EDGEENDO X7 rotary system file size 20 up 40 taper 04. samples then randomly separated into four groups procedures (each group n = 10), A: obturated by WVC, B: GC, C: CLC, D: SC. Following obturation, kept in an incubator 37°C 100% humidity weeks. Three slices 2 thickness cut horizontally 2, 4.5, 7 apex each sections (apical, middle coronal). data investigated using one-way ANOVA Tukey's test significance level (p< 0.05). A digital microscope magnification 60 X used establish failure mode. Results: There significant increase following GC particularly apical third (9.48, 8.11 MPa, respectively) , compared SC CLC all levels except third, 0.05) level. cohesive mode most prevalent groups. Conclusio: BC (TotalFill) showed higher when WVC other techniques. comparable values.