The study analyzes the difference in post operative pain after root canal therapy, after using different activation protocols and devices. The subjects are divided into 2 groups and a different activation protocol is used in each group. In one group, final activation of irrigating agent during root canal therapy is done with an ultrasonic activation device, and in the other group, manual dynamic agitation is done using master gutta percha cone. The Post operative pain is then compared at 8, 24,and 48 hour intervals

Root canal therapy is a procedure in which inflamed pulp tissue and microorganisms are removed from root canals and pulp chamber, in order to eradicate infection and symptoms. Irrigation is a crucial step of an endodontic therapy and different methods and protocols are used to enhance the efficacy of irrigation. Ultrasonic activation of root canal irrigation agent is one of the effective methods that enhance the outcomes and success rate of endo therapies. It removes the smear layer, bacterial biofilms and debris by acoustic streaming and agitating the irrigant inside root canals. Similarly, a conventional method of agitation (manual dynamic agitation) also play an important role in endodontic therapy, particularly by improving the delivery of irrigation agent to the apex of a root canal. The later method involves agitation of irrigant with master gutta percha cone with continuous to and fro strokes manually.

In this study, the efficacy of both the different irrigation protocols will be compared and assessed based on post-operative pain, measured by Visual Analog Scale (VAS).

Inclusion Criteria:

1. Patients with unremarkable/ noncontributory medical history
2. Healthy persons between the ages of 18 and 60 years
3. Maxillary and mandibular molar teeth diagnosed with symptomatic irreversible pulpitis.
4. Patients not having taken any medication for 6 hours before treatment
5. No allergies to the drugs or dental material being used in the treatment

Exclusion Criteria:

1. Patients who had taken analgesics on anti-inflammatory drugs within the last 12 hours
2. Pregnant women and patients with immunocompromised health state
3. Patients having severe malocclusion associated with traumatic occlusion
4. Teeth with calcified canals
5. Teeth with periapical radiolucency
6. Teeth with root resorption
7. Teeth previously undergone root canal treatment

Participants of the study and outcomes assessor would not know the details of groups, and only the investigator and care provider would be aware of that, as they cannot be blinded due to the nature of this study