
Shaping and Cleaning is considered as one of the most important phase of the endodontic treatment. In our study we compare and evaluate the remaining dentin thickness of root canals using Neo-Endo and Revo-S file systems with the help of cone beam computed tomography for analysis. Thirty extracted human mandibular molars were taken and Pre-instrumentation cone beam computed tomography scan was done. After the instrumentation with each file post instrumentation cone beam computed tomography scans were taken. Neo-Endo and Revo-S file systems showed statistically significant difference in remaining dentin thickness. Hence we concluded that Revo- S file system removed less dentine than Neo-Endo file system.