Díaz-Flores García, VíctorPimienta Vázquez, María IsabelTejedor Bautista, BeatrizSuárez García, AnaFreire Mancebo, Yolanda2024-10-082024-10-082024Díaz-Flores García, V., Pimienta Vázquez, M. I., Tejedor, B., Suárez, A., & Freire, Y. (2024). Comparative study of torsional and bending stress in NiTi, graphene, and GUM metal endodontic files by finite element analysis. Computers in Biology and Medicine, 170, 108017. https://doi.org/10.1016/j.compbiomed.2024.1080170010-4825http://hdl.handle.net/11268/13124Introduction: This study investigates the behavior of graphene and GUM in terms of cyclic fatigue resistance and torsion through a finite element analysis on a file with an eccentric rectangular cross section and variable taper, and on a file with a centered triangular cross section, constant taper, and constant pitch. Methods: Root canals and endodontic files were created using Catia V5R21 software. For torsional analysis, the tip of the file was fixed at 1 and 3 mm, and a moment of 2.5 N-mm was generated at the handle. For the bending analysis in curved canals (45° and 60°), the handle was kept fixed and a force of 1 N was applied at the tip while the file was kept fixed at 9 mm. Results: GUM metal instruments showed better torsional resistance. On the other hand, NiTi and graphene performed better under the applied loads during flexion at 45° and 60°. Conclusion: GUM metal is emerging as a promising material in the field of endodontic instrument design due to its physical properties.engAttribution-NonCommercial-NoDerivatives 4.0 Internacionalhttp://creativecommons.org/licenses/by-nc-nd/4.0/journal article10.1016/j.compbiomed.2024.108017open accessOdontologíaMaterial sanitarioGoal 3: Ensure healthy lives and promote well-being for all at all ages