Resolution of Pain and Swelling After the Use of Neem Leaf Extract Compared to Chlorhexidine Gluconate as an Intracanal Irrigant During Pulpectomy

Inclusion Criteria: * Patient and parent cooperation. * Absence of any systemic disease that would contraindicate pulp therapy. * Non vital molar teeth presenting with an acute or chronic periapical infection as a result of pulp necrosis ( Periapical abscess ,a sinus tract formation as a sequelae ) * Making sure the patient is not taking an antibiotic and has not taken it for the past 2 weeks. * Absence of physiologic or pathologic root resorption that contraindicate pulp therapy. * Restorable teeth * Molars with at least two thirds of root remaining. Exclusion Criteria: * Children with any condition that contraindicates pulp therapy will be excluded (rheumatic fever, infective endocarditis , leukemia , corticosteroid therapy and immunosuppressed children).