Root canals are the
long passages full of soft tissue deep within the dentin of a
adjoining the pulp chamber. In dentistry, a pulpectomy is an
endodontic treatment to cure an infection of the root canal; informally a root canal.
A root canal, coupled with internal tooth bleaching, is also used to fix teeth that have
blackened because of infiltration of decayed soft tissue into
the dentin in the teeth, most often seen in frontal incisors that have been injured through a sudden impact.