To Determine Effect Of Apical Third enlargement To Different Taper And Master Apical Preparation Size On Periapical Healing And Postoperative Pain After Primary Single Sitting Non Surgical Root Canal Treatment : A Randomized Clinical Trial
18-65 years of age of either sex
Asymptomatic teeth having pulpal necrosis with apical periodontitis in a mandibular molar (no response to EPT or cold test)
Radiographic evidence of periapical radiolucency corresponding to a periapical index (PAI) score >/=3 in mesial root of mandibular molars
Patients who were medically compromised
Patients with initial apical binding file (IABF) size more than 20
Pregnancy; lactation & contraceptives.
Positive history of antibiotic use within the past month or required antibiotic premedication for dental treatment (including infective endocarditis or pros thetic joint prophylaxis -