To locate the canal orifice use:
- a- barite probe
- b- endo spreader
- c- endo file with curved tip ***
- d- round bur.
The correct answer is c- endo file with curved tip.
An endo file with a curved tip is used to locate the canal orifice because it can be easily guided into the canal and follow its curvature. The other options are not as effective at locating the canal orifice:
a- barite probe:
A barite probe is a blunt instrument that is used to explore the pulp chamber and locate the canal orifices. However, it is not as effective as an endo file with a curved tip because it cannot be easily guided into the canal and follow its curvature.
b- endo spreader:
An endo spreader is used to widen the canal orifice once it has been located. However, it is not effective at locating the canal orifice.
d- round bur:
A round bur is used to remove tooth structure and create access to the canal orifices. However, it is not as effective at locating the canal orifice as an endo file with a curved tip because it can damage the canal if it is not used carefully.
