Evaluation of the Effect of Root Canal Shaping With TruNatomy on Postoperative Pain and Operative Torque Generated During Instrumentation

Inclusion criteria

• Patients who are free from any physical or mental handicapping condition and no contributory systemic disease.
• Age between 30-60 years old.
• Males & Females.
• Patients' acceptance for participating in the trial through an informed consent
• Maxillary permanent premolar teeth:

• Diagnosed clinically and radiographically with pulp necrosis
• With or without periapical radiolucency
• Negative response of pulp tissue to thermal and electric pulp tester
• Possessing two independent roots each having a type I canal
• Patent canals with no internal calcification or resorptive lesions
• Fully formed roots
• Root curvatures less than 30

Exclusion criteria

• Patient with contributory medical condition
• Badly destructed teeth
• Patients with pre-operative pain
• Patients having significant systemic disorders
• Patients with two or more adjacent teeth requiring root canal therapy
• Patients who had received antibiotics in the last month
• Teeth presenting with:

• Positive response to thermal or electric pulp tester
• History of trauma or previous endodontic treatment
• Immature or open apices
• Association with acute periapical abscess and swelling or fistulous tract
• Fused roots at any level
• Canals larger than size 15# K-file
• Periodontonal/ endodontic lesions
• Mobility higher than grade I
• Radiographic evidence of external or internal root resorption vertical root fracture, perforation, calcification.
• Severe root curvature (>30)