Doctor, good day. When working with an endodontic motor with an integrated apex locator, should we set the apical stop to the 0 point? We are told to work 0.5 short of the 0 point, but is it possible to tell which line on the endodontic motor represents 0.5 short? Or would it make more sense to work according to the exact 0 point?

Question

Doç. Dr. İsmail Davut Çapar · Accepted Answer

In most motors,
0 is the major foramen.

The 01, 02 and 03 points are estimated positions of the minor foramen; one of these can be used. I generally work at the 01 point. If the patient feels sensitivity, I select the 02 or 03 points.