Best root canal treatment in kovilambakkam. Root canal treatment: Step 1 Our dentist will numb the tooth to reduce your discomfort. An opening is made through the crown of your tooth to the pulp chamber. Step 2 Special files are used to clean the infected and inflammed nerve/pulp out of the canals. The root canals are sterilized. Step 3 Then they shape the canals for the filling material. Irrigation is used to help clean the canals and remove debris. Step 4 A temporary filling material is placed on top of the gutta-percha to seal the opening. A post may be placed in the root canal for structural support. Step 5 The filling remains until the tooth receives a permanent filling or a crown. A crown, sometimes called a cap, looks like a natural tooth. It is placed over the top of the tooth.