Each tooth is having a nerve and blood supply through its centrally tissue called Dental Pulp. Pulp is securely placed inside the hardest tissue ,enamel and less harder layer of Dentine. But the nerve gets exposed and infected due to deep cavities or fracture of teeth due to accidents or trauma.
Once the pulp tissue is infected , it is irreversible and will lead to severe pain and swelling. Infected pulp tissue should be carefully removed ,the pulp chamber as well as root canals, through which the nerve reaches the pulp, has to cleaned and filled properly.
This procedure is known as Root canal Treatment or RCT. It is done in One sitting or multiple sittings depending on the condition of each case.