Performed by an endodontist, RCT usually takes one or two sittings. At times, additional sitting(s) may be required because some teeth prove to be challenging to treat. First a dental X-ray is done to check the exact damage. Local anaesthesia is administered to make the area numb and then a rubber like sheet called a dental dam is put inside the mouth to keep the tooth clean and free of saliva.
After removing the decayed particles, an opening is made throw the crown of the tooth to gain access to the pulp chamber. Afterwards, infected pulp is removed using small dental instruments. After removing the infected pulp, canals are given proper shape and enlarged for the filling material. Irrigation process may be used to clean and flush up the debris from canal.
If required, in some cases, medication is put into the pulp chamber and root canal to clear any infection. In case the infection has spread beyond tooth then a course of antibiotic may be administered. Temporary filling is placed in the crown to protect the tooth from further decay for the patients requiring multiple visits. Patients are advised to avoid biting or chewing until the tooth is fully treated and restored.
In order to help the canals free of infection afterwards and fill the dead space, the canals are filled with rubber material called gutta-percha cones. The top is sealed to prevent filling material to ooze out. The filling made up of gutta-percha remains until the permanent filing or crown or cap is fixed, which makes it look like a natural tooth.