In a root canal procedure, the dentist will anaesthetize the patient in that particular area with a local anaesthetic. In few anxious patients, conscious patients may also be advised. With help of endodontic instruments the infected pulp is removed, followed by thorough disinfection. Final step of root canal is where the canal fillings are done followed by tooth filling in the decayed part through silver amalgam or latest tooth coloured filling. If an abscess is there, the dentist possibly must drain it; this may take a few days, and a further appointment is probably required to finish the procedure. The root canal treated teeth may or may not require a crown.