Edition V07N01 | Year 2017 | Editorial Original Article | Pages 92 to 96
Introduction: Many factors relative to the characteristics of dental instruments, such as cross-section, tip design and taper, can enhance the action of wearing on root canal walls. Nevertheless, whether file length influences or not preparation quality remains unclear. Objective: To assess the influence of file length over quality of root canal preparation. Methods: Thirty simulated root canals (IM do Brasil) were divided into two groups and prepared with 21-mm and 25-mm FlexoFile instruments and 25 mm FlexoFile instruments in Groups I and II, respectively. The crown-down technique was employed and the apical third enlarged up to file #35. The simulated root canals were photographed and radiographed prior to and after root canal preparation. Images were analyzed with the aid of Image Toll 3.0 software. Wear distribution and apical deviation were analyzed by superimposing both images. Results: No statistically significant difference was found in terms of wear distribution or apical deviation between groups. Conclusion: File length had no influence on centralization of root canal preparation and apical deviation of simulated root canals.