Centering Ability of ProTaper Next and WaveOne Classic in J-Shape Simulated Root Canals

Figure 1

Reference points were built, constructing 9 concentric circles centering the apex at increasing diameters of 1 mm (red lines). To improve the accuracy of measurements, additional concentric circles were drawn starting at 0,5 mm from the apex at increasing diameters of 1 mm (black lines).