Comparing Efficacy of a Stainless-steel Rotary File with Two Nickel-titanium Systems on Periapical Lesion Healing

In arm one, stainless steel tornado files works by high-speed rotation that influences the fluid dynamics within the canal and improves irrigation efficiency. Canals are finished with a file having a 4% taper and an apical diameter of 0.25 mm.

In arm two, WaveOne system is a single reciprocating file system with a heat-treated NiTi Memory Wire (M Wire).It has a taper of 0.08 in apical 3 mm, with a tip diameter of 0.25 mm. in a torque control endodontic handpiece (X smart plus with reciprocation mode)

In arm three, OneShape system utilizes a conventional, continuous rotational motion. It has asymmetric cross-sectional geometry, and traveling waves of motion that are produced along the file's active region. It has a single constant taper of 0.06 and a tip size of 25 with distinct cross-sectional designs along the whole length of the working parts

A post-operative CBCT image was obtained and compared to the pre-operative one to assess the impact of canal preparation of each file on the periapical lesion.