Exploration for the canal orifice
Before the canals can be entered, their orifices must be found. In older patients, finding a canal
orifice may be more difficult to find. The endodontic explorer is used to find the canal orifice
and exploring the walls of the pulp chamber. When the orifices are found, a small size instrument
as file size 10-15 is used to ensure canal patency. The pulp should be removed by a barbed broach which should enter to the canal without bending
nor engagement with the canal walls.