Amr Ayman Abo El Enin Ahmed Geraldine Ahmed And Randa Al Boghdady .,

ABSTRACT


Introduction: Many Endodontic Instrumentation Techniques Have Been Innovated. However, All Of Them Were Associated With Some Degree Of Debris Extrusion, An Important Cause Of Post-endodontic Pain. This Study Was Designed To Compare The Influence Of Two Different Kinematics Of Rotary Nickel-titanium Instrumentation Systems: Full Rotation Files (ProTaper Next) Versus Reciprocation Files (Reciproc) On The Incidence Of Postoperative Pain After Multiple Visit Endodontic Treatment In Asymptomatic Necrotic Mandibular Molars.

Materials and Methods: Sixty Patients With Asymptomatic Necrotic Mandibular Molars Were Included. After Confirming The Diagnosis Clinically And Radiographically, Patients Were Randomly Assigned Into Two Equal Groups Of 30 Patients Each. Standard Endodontic Treatment Was Performed In Two Visits. The Patients In The Intervention Group Were Treated Using Reciproc Reciprocating Files During Cleaning And Shaping; While ProTaper Next Rotary Files Were Used During Cleaning And Shaping Of Root Canals In Patients Assigned To The Comparator Group. 2.5% Sodium Hypochlorite Was Used For Irrigation And Obturation Was Performed A Week Later Using The Modified Single Cone Technique With A Resin Sealer. Pain Was Assessed Pre-operatively And The Tooth Was Confirmed To Be Asymptomatic, Then After 6, 12, 24 And 48 Hours After Root Canals Instrumentation, And After 6- And 12-hours Following Root Canal Obturation. Numeric Pain Rating Scale (NRS) Was Used As The Primary Outcome Measure. Patients Were Given A Placebo To Be Administered In Case Of Mild Pain And An Analgesic Was Prescribed In Case Of Emergency. All Demographic Data And NRS Scores Were Collected From The Patients And Statistically Analyzed.

Results: Results Showed That, Reciproc Files Caused A Statistically Significant Increase In The Incidence Of Pain After 6- And 12-hours Following Root Canal Instrumentation (P Value= 0.046, 0.042 Respectively). Conclusion: Within The Limitation Of This Study It Was Concluded That Reciproc Files In Reciprocating Motion Increase The Incidence Of Post-operative Pain In The First 12 Hours After Cleaning And Shaping.