Assessment of Postoperative Pain After Using Various Intracanal Medication in Patients With Necrotic Pulp

Inclusion Criteria: * Patients who are free from any physical or mental handicapping condition with no underlying systemic disease. * Non-pregnant females * Asymptomatic necrotic mandibular single rooted teeth. * Normal occlusal contact with the opposing teeth. * Patients accepting to participate in the study. Exclusion Criteria: * Medically compromised patients: Pain levels and healing following treatment would be compromised as these patients have shown higher incidence of pain and lower healing rate. * Pregnant women: Avoid radiation exposure, anesthesia, and medication. * If analgesics or antibiotics have been administrated by the patient during the past 12 hours preoperatively might alter their pain perception * Patients reporting bruxism or clenching: Avoid further pressure on an already inflamed tooth inducing subsequent irritation and inflammation Teeth that shows: * Association with acute periapical abscess and swelling: Need special treatment steps which could involve additional visits with incision and drainage. Also, it could influence initiation and progression of postoperative pain. * Greater than grade I mobility or pocket depth greater than 5mm. Need special surgical and/or periodontal therapy. * No restorability: Hopeless tooth. * Vital teeth * Immature teeth * Radiographic evidence of external or internal root resorption. * Any criterion, not mentioned in the inclusion criteria