The aim of this clinical trial is : To evaluate effect of different techniques of irrigant activation: 1. LASER activation 2. sonic activation 3. ultrasonic activation 4. passive needle irrigation On: 1. Postoperative pain in vital teeth (Randomized controlled trial) 2. Amount of apical extrusion (In vitro study) Participants will describe their preoperative pain and postoperative pain level at fixed time interval Research will compare postoperative pain accompanied with different irrigant activation techniques and correlate it to amount of debris extrusion
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Evaluation of postoperative pain
Timeframe: 8,24,48 hours and one week