Cleansing the Cavity

All of the caries, debris, and necrotic material must be removed from the chamber before the radicular preparation is begun. Leaving the calcified or metallic debris in the chamber can cause obstruction during canal enlargement. The soft debris from the chamber might increase the bacterial population in the canal.

The long-blade, endodontic spoon excavator is ideal for debris removal. Sodium hypochlorite (NaOCl) should also be used during the access preparation for its added benefits of disinfection, removal of hemorrhagic or purulent fluids, and flushing action of debris and dentin chips. The chamber can be finally wiped out with cotton and a careful flush of air will eliminate the remaining debris. You must be careful not to aim the air down the canals to prevent air embolism.