The dentist gives you a local anesthetic (freezing).
To protect your tooth from bacteria in your saliva during the treatment, the dentist places a rubber dam around the tooth being treated.
The dentist makes an opening in the tooth to reach the root canal system and the damaged pulp.
Using very fine dental instruments, the dentist removes the pulp by cleaning and enlarging the root canal system.
After the canal has been cleaned, the dentist fills and seals the canal.
The opening of the tooth is then sealed with either a temporary or permanent filling.