The root canal procedure removes diseased pulp from inside the tooth, cleans and fills the tooth's root canal, then seals the area.
Diseased pulp leads to severe sensitivity and symptoms, if not removed.
To visualize it, an 80-second video of a root canal helps.
Causes & symptoms
What causes a tooth's pulp to become diseased? Most commonly, it is a cracked tooth, loose filling, or large cavity, all of which invite bacteria into the tooth that infect or inflame the pulp.
Symptoms include darkening of the tooth, swelling of the gums nearby, and toothache from chewing or consuming hot/cold foods/drinks.