Effect of Ascorbic Acid Final Flush on Post-operative Pain in Mandibular Molars.

Inclusion Criteria: * Patients above 18 years old and to 60. * Male or female. * Patients seeking root canal treatment. * mandibular molar teeth with symptomatic irreversible pulpits with preoperative acute or moderate pain with hot and cold stimulation with normal periapical radiographic appearance . * healthy patient (ASA I,II). * Patient who can understand NRS and sign informed consent. Exclusion Criteria: * Medically compromised patients having significant systemic disorders. (ASA III or IV). * History of intolerance to NSAIDS. * 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. * TMJ problems, bruxism, clenching or traumatic occlusion. * Inability to perceive the given instructions.