Naglaa Abdul Rahim Idfawy, Magdy Mohamed Aliand Mohammed Turky Abd El Razik,

ABSTRACT


Aim: To Evaluate The Postoperative Pain And Bacterial Reduction Following Root Canal Treatment In Teeth With Necrotic Pulp Using Calcium Hydroxide, Calcium Hydroxide Mixed With Chlorohexidine And Nanoparticles Calcium Hydroxide As Intracanal Medication.Material And Method: 80 Male Or Female Patients Of 25-50years Old With Asymptomatic Uniradicular Necrotic Teeth Were Selected And Randomly Assigned Into Four Groups According To The Intra-canal Medication Used: No Dressing Groups (control Group), Calcium Hydroxide Group (CH) With Saline, Calcium Hydroxide With Chlorhexidiene, Nano Particles Calcium Hydroxide. After Isolation, Access Cavity Was Performed Followed By Chemo-mechanical Preparation Using Fanta Rotary Filesand Conventional Irrigation Protcol Then Intra-canal Medication Was Placed By Lentulo Spiral In The Firsttreatment Session. While In The Second Session After 7 Days, The Intracanal Medication Were Removed And Canal Were Obturated. Postoperative Pain Was Assessed At 4, 24, 48 Hours And After 7 Days Postoperatively Using NRS. Bacteriological Samples Obtained From The Root Canals Before (S1) And After Instrumentation (S2) In The Firsttreatment Session. Subsequently, Bacterial Reduction Was Assessed In The Second Session After 7 Days (S3) Using Colony Forming Unit Test.

Results: All Intracanal Medicaments Resulted In A Statistically Significantdecrease In Mean Pain Value From 4 Hours To 7 Days Postoperatively. While, When Comparing All Groups, Nano Particles Calcium Hydroxide Showed The Least Post-operative Pain Compared To Others Groups With No Statistically Significantdifference. A Statistically Significantbacterial Count Reduction From S1 TO S2 And From S2 To S3. Nano Particles Calcium Hydroxide Achieved Significantbacterial Count Reduction Compared To Others Groups.Conclusion: All Intracanal Medicaments Was Efficientin Reducing Postoperative Pain In Asymptomatic Uniradicular Necrotic Teeth While The Use Of Nano Particles Calcium Hydroxide As Intracanal Medication Was More Effective Than That Of Calcium Hydroxide And Chlorhexidien Mixed With Calcium Hydroxide And In Bacterial Reduction.