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 nocontributory 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 rootfracture, perforation, calcification.

• Severe root curvature (>30)