Mohamed Elsaeed Mohamed Ali, Wael Hussein Kamal And Magde Mohamed Ali,

ABSTRACT
This Clinical Study Was Conducted To Evaluate And Compare The Post-operative Pain After The Using Of Two Different Irrigating Techniques : Activation Of Irrigation Using Diode Laser And Conventinal Needle With Endvented Navitip Immediate Postoperatively And 4, 12, 24, 48, 72 Hours And 7 Days Utilizing A Numerical Rating Scale (NRS). 38 Patients With Acute Pulpitis With Apical Periodontitis, Root Canals Were Prepared Using NiTi ProTaper Universal Rotary System Then Randomized Into Two Equal Groups According To The Technique Used For Irrigation Group (A) Activation Of Irrigation Using Diode Laser And Group (B) Conventional Syringe With Endvented NaviTip? Irrigating Tip, The Needle Of Irrigation Were Penetrated 2 Mm Shorter Than The Working Length. The Trial Design Of This Study Is A Parallel Randomized Controlled Trial. All Demographic Data, Clinical And Radiographic Findings And Modified NRS Scores Obtained From Patients Were Statistically Analyzed. Results Showed That There Was No Statistically Difference Between The Two Groups Regarding The Demographic Data, Prevalence Of Pre-operative Pain, After 4 Hours, 12 Hours, 24 Hours, 48 Hours And 7 Days , While In Both Groups There Was A Statistically Significant Decrease In Pain Intensity Preoperatively Compared With All Other Time Periods.