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Aim: To compare the vertical root fracture resistance of endo­ dontically treated teeth obturated using different obturating materials. Materials and methods: Decoronated roots of 75 single canal lower second premolar teeth were divided randomly into 5 groups. The first group (Group I) served as a negative control. The remaining four Groups were cleaned and shaped using ProTaper Endodontic rotary files and obturated with guttapercha + TubliSeal EWT sealer (Group II), ThermaFil + AH Plus sealer (Group III), RealSeal + RealSeal sealer (Group IV) and GuttaFlow obturating system (Group V). The roots were then embedded in acrylic resin blocks and subjected to vertical load until fracture with a spreader in a universal testing machine and the forces were recorded. Results: Fracture resistance of group I > group IV > group V > group III > group II, which were statistically significant. Conclusion: Obturation of roots with resin based obturation material—RealSeal had increased VRF resistance compared to the gutta­percha obturation systems. Clinical significance: Obturation of the root canals with resin based obturation system—Resilon reinforces the fracture resistance of endodontically treated teeth and contributes to the overall success of the endodontic treatment.

A Comparative in vitro Evaluation of Vertical Root Fracture Resistance of Endodontically Treated Teeth using Different Obturating Materials