During RCT, The dentist removes the inflamed or infected pulp, carefully cleans and shapes the inside of the canal, a channel inside the root, then fills and seals the space. Afterwards, the dentist will place a crown or other restoration on the tooth to protect and restore it to full function. After restoration, the tooth continues to function like any other tooth.
If treated early, root canal therapy need not be uncomfortable. With modern dental techniques available and the use of local anesthetics, the entire procedure can be totally painless.