Operative Torque Analysis to Evaluate Cutting Efficiency of Two Nickel-Titanium Rotary Instruments for Glide Path: An In Vitro Comparison

Aim and objective The aim of this study was to evaluate compare the cutting efficacy two different nickel titanium rotary instruments by a novel methodology: operative torque (torque time needed progress toward apex). Materials methods Ten fresh extracted upper first premolars with canals were instrumented KaVo (Biberach, Germany) 1:1 handpiece at 300 rpm maximum set 2 N. One canal ProGlider NiTi (Dentsply Sirona Endodontics, Ballaigues, Switzerland), tip size 16.02, other one EgdeGlidePath instrument (EdgeEndo, Albuquerque, New Mexico). Mean instrumentation time, mean values, values evaluated for each instrument. significance level p Results EdgeGlidePath reached working length in significantly less smaller amount when compared (p >0.05). No exhibited flute deformation or underwent intracanal failure. Conclusions Operative is related capability cut dentin apex: higher ability (and safety). also dependent on debris removal irrigation techniques. Nevertheless, both are clinically relevant parameters evaluating instruments' performance (i.e., ability). Clinical during endodontic helps understanding overall terms efficiency safety.