An Ex-vivo Comparative Evaluation of Apical Debris And Irrigant Extrusion From Curved Canals Using Three Different Ni-Ti Instruments With Conventional Irrigation Methods.

An Ex-vivo Comparative Evaluation of Apical Debris And Irrigant Extrusion From Curved Canals Using Three Different Ni-Ti Instruments With Conventional Irrigation Methods.     Abstract-   Aim: The present study aimed to compare and evaluate debris and irrigant extrusion from curved root canals using different Ni-Ti systems.     Materials and Method: 30 single rooted mandibular premolars were used in this study. Crown was decoronated, working length and initial apical diameter was established. 1.5% agar gel model was used in this study. Samples were assigned randomly into 3 groups (n = 10 teeth per group). Protaper Next, OneShape, NT GOLD files were used according to the manufacturers’ instructions for canal instrumentation. Apically extruded debris and irrigant was computed by deducting the initial weight of the test apparatus without a tooth from its weight after the biomechanical preparation. Comparative analysis of the amount of apically extruded debris and irrigant for each of the instruments and the experimental models was performed. Results: Statistically significant difference was found between the three experimental groups. (P <.05). Amid all the groups least extrusion was observed in the Protaper Next group when used in combination with conventional irrigation Conclusion: All the instruments produced apically extruded debris and irrigant, but maximum was seen with OneShape among the experimental groups. Keywords: Apically extruded debris and irrigant, NT Gold, ProtaperNext, OneShape