Doctor, do you think treatment would be incomplete if we always used a 0.4 system? That is, 20 0.4, 25 0.4 and finishing at 30 0.4. I really liked it when I used it. Now I use an F-series system; the canals are difficult to open because of the taper.

When first entering the canals, we can advance to full length with Super System 10/06 and continue with 04 taper in the subsequent files.

If we are going to start with Advenced kit10/07, we can use this file 3-4 mm short of the canal length and then reach length with 10/04. We can then continue with 04 taper files.

By F-series files, you mean ProTaper equivalents; I do not prefer these files because their taper is very high