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IRCT20200517047478N2 IRCT 2021-06-02 Islamic Azad University effect of smear layer removal on postoperative pain in necrotic teeth with chronic apical periodontitis effect of smear layer removal on postoperative pain in necrotic teeth with chronic apical periodontitis 2021-05-31 anticipated 72 Complete https://irct.ir/trial/56495 interventional Randomization: Randomized, Blinding: Single blinded, Placebo: Not used, Assignment: Parallel, Purpose: Treatment, Randomization description: Using the rand option of Excel software, the samples will be divided into 4 blocks by complete block randomization method. This process is performed by a person who is not present in the clinical work and follow-up of patients (statistics and methodology consultant) and the type of intervention will be provided to the researcher in envelopes in numbered packages and the researcher will open the lock immediately The type of specialized intervention will be informed, Blinding description: patients do not know which intervention is being performed on them. 3 postoperative pain. Intervention 1: Intervention group: In this group of 36 people after preparation by Step Back method and rinsing with 1%sodium hypochlorite, in order to remove smear layer, 5mL of 17% EDTA will be used for 1 minute and then 2mL of 5.25% sodium hypochlorite for 30 seconds. Intervention 2: Control group: in this group of 36 people smear layer won't be removed and 2mL of normal saline will be used for final rinsing. Yes - There is a plan to make this available What will be shared: Some parts of data related to interventions are possible for sharing When: 6 months after publication To whom: people who work at university Conditions: not possible Where to obtain: Sohrab tour savadkouhi Email: s_savadkouhi@yahoo.com How to obtain: Contacting with the correspondence and introducing himself receiving the data within 1 month Comments:
public Azin Pourmohammad
pasdaran
tehran Iran (Islamic Republic of) 1956819111 +98 21 2256 4571 azinpd1@gmail.com Islamic Azad University scientific Dr. Sohrab Tour Savadkouhi
Pasdaran
tehran Iran (Islamic Republic of) 1946853314 +98 21 2256 4571 s_savadkouhi@yahoo.com Islamic Azad University Iran (Islamic Republic of) patients with ASA1- ASA2 necrotic single canal teeth in maxilla and mandible are chosen teeth should not have sensitivity to percussion teeth should have chronic apical periodontitis with periapical index 3 to 5 patients must be between 18 and 60 years old teeth should not have internal or external root resorption root curvature should be less than 30 degrees 18 years 60 years Both patients who are less than 18 years old or more than 60 yeas old pregnant women patients with systemic diseases patients with history of allergic reaction to local anesthesia The patient should not use any drugs for at least 6 hours before treatment. multi canal teeth teeth with more than 8mm lesion size teeth with severe periodontal disease R52 Pain, unspecified Treatment - Other Treatment - Other Intervention group: In this group of 36 people after preparation by Step Back method and rinsing with 1%sodium hypochlorite, in order to remove smear layer, 5mL of 17% EDTA will be used for 1 minute and then 2mL of 5.25% sodium hypochlorite for 30 seconds Control group: in this group of 36 people smear layer won't be removed and 2mL of normal saline will be used for final rinsing. Postoperative pain in single canal teeth. Timepoint: 6h. 12h. 24h. 48h. 72h .7D. Method of measurement: information form. Islamic Azad University Approved 2021-05-22 Ethics committee of Azad Tehran University of Medical Sciences pasdaran tehran Tehran Iran (Islamic Republic of)