An in vitro comparison of the time it takes to reach working length for various file systems depending on glide path size and fracture resistance

Aim: The current research was conducted to determine the time required to reach the working length depending on glide path size, operating kinetics, and the fracture resistance of various file systems. Materials and Method: From 120 freshly extracted single canal mandibular premolars, 2 groups of 60 freshly extracted single canal mandibular premolars were formed. Group A experienced continuous 360° rotary motion with ProTaper Gold file, whereas Group B experienced adaptive motion with TF file systems. The time it took to reach the desired working length (in seconds) was recorded. Torsional and flexural failures were classified. Results: The glide path took 6.82 4.02 seconds for file size 15 in group A and 7.09 4.12 seconds in group B. Group A took less time than group B, and the variation was statistically considerable (P 0.05). The minimum time taken by file number 1 was 6.19± 2.08 and 3.11± 1.03 seconds in group A and B, and for file number 2 it was 4.36± 1.74 and 7.49± 2.69 sec in group A and B respectively and for file no 3 it was 6.58± 3.17 and 5.38± 1.36 sec in A and B groups respectively. In both groups, there was a considerable variation in time taken with dissimilar number files (P 0.05). The average time needed for continuous rotation to reach the working length was less than for TF adaptive motion, but the difference was not statistically significant (P> 0.05). The first file system in the apical glide path no 1 of the TF system had a fracture of size 15 file. Conclusion: With the TF system and adaptive motion, we achieved greater instrument separation and deformation. In comparison to ProTaper Gold file system, the TF system required more time to reach the working length