1. Be cognizant with the pulpal anatomy of the tooth to be treated, proper access to be gained the chamber and guidelines for instrument use. 2. To have tridimensional, positional criterion and perfect visibility. 3. In narrow canals be careful with the passage of instruments from 25 to 30, which could foster a perforation. 4. Avoid use of rotary instruments. There are to be used only when the case warrants it and the canals are sufficiently wide.
1 Conocer la anatomía pulpar del diente a tratar, el correcto acceso a la cámara y las pautas para el empleo de los instrumentos 2 Tener criterio posicional, tridimensional y perfecta visibilidad 3 Tener cuidado en conductos estrechos en el paso instrumental del 25 al 30, momento propicio para una perforación 4 No emplear instrumentos rotatorios sino en casos indicados y conductos anchos