@article{Gabardo_Silva_Gonçalves_Deonízio_2015, place={Limeira, SP}, title={Effectiveness of different obturation techniques in surpassing the ledge formed in simulated curved canals}, volume={12}, url={https://periodicos.sbu.unicamp.br/ojs/index.php/bjos/article/view/8641101}, abstractNote={Aim: To compare the effectiveness of different obturation techniques in surpassing the ledge formed in simulated curved root canals. Methods: Eighty acrylic-resin blocks with curved canals were instrumented with Gates-Glidden drills to simulate a ledge formation. Then, a K-File #10 was used for trying to surpass the deviation, and the blocks that permitted surpassing were rejected. The remaining blocks were divided into 4 groups according to the obturation technique: lateral condensation, Tagger’s Hybrid technique, Thermafil and System B. The blocks had their images digitalized using a scanner before and after the obturation procedures. The images were analyzed with Image Tool 3.0 software. Statistical analysis was performed by one-way ANOVA at a significant level of 5%. Results: The System B resulted in the highest obturated area (p<0.001). There were no significant differences between the Tagger’s Hybrid technique and Thermafil system regarding the effectiveness in surpassing ledge (p>0.05). The lateral condensation resulted in the worst ability in filling the ledge space (p<0.001). Conclusions: Within the limitations of this study, it was possible to conclude that techniques using heat condensation or gutta-percha thermoplastification were more effective in surpassing the ledge formed in curved canals than the lateral condensation.}, number={2}, journal={Brazilian Journal of Oral Sciences}, author={Gabardo, Marilisa Carneiro Leão and Silva, Wander José da and Gonçalves, Letícia Machado and Deonízio, Marili Doro Andrade}, year={2015}, month={Oct.}, pages={138–142} }