Inclusion Criteria:  Patients above 18 years old and below 66. Male or female Patients seeking root canal treatment Mandibular posterior molarteeth with Symptomatic irreversible pulpitis . Spontaneous pain Systematically healthy patient(ASA I,II)  Exclusion Criteria:  Medically compromised patients having significant systemic disorders. (ASA III or IV) History of intolerance to NSAIDS. Patients with two or more adjacent teeth requiring endodontic treatment. External root resorption Internal root resorption Vertical root fracture Periapical lesion Pregnancy Use of ibuprofen in the last 12 hour Bleeding disorder Long term corticosteroid use Mobility Grade II or III. Pocket depth more than 5mm. Previous root canal therapy. Non-restorability Temporomandibular joint (TMJ) problems, bruxism, clenching or traumatic occlusion. Inability to perceive the given instructions.