Diaa Eldin Abulhassan Mosref, Magdy Mohamed Ali And Mohamed Medhat Kataia,

ABSTRACT


Introduction: The Aim Of The Study Was To Compare Between WaveOne Gold And WaveOne Reciprocating Files Concerning Surface Topography Analysis Using (SEM) And Changes In Canal Curvature Using (CBCT). Methods: A Number Of Extracted Mandibular Molars Were Collected, Their Mesial Roots Were Cut Using Diamond Disk. The Preoperative Angle Of Curvature Was Measured According To Schneider Technique On CBCT Images Scans. Seventy Two (72) Roots With Curvature Angles Ranges From 5o To 45o Were Selected For This Study Then Canal Preparation Was Done Using WaveOne Gold And WaveOne Files. The Angles Of Curvature Were Measured After Instrumentation And Comparison Was Done By Fusion (superimposition) Of The Pre-operative And Post-operative Cone Beam Scans. WaveOne Gold Files And WaveOne Files Were Scanned Using SEM Before And After Preparing 3,6,9 Canals. One Way-ANOVA Was Used To Study The Effect Of Different Groups On Mean Canal Curvature And Measurements Of Canal Transportation. Statistical Analysis Was Performed With IBM? SPSS? Statistics Version 21 For Windows.

Results: It Was Found That ?WaveOne Gold? File System Has Recorded Lower Statistically Significant Degree Of Canal Transportation After Instrumentation Than The ?WaveOne? File System (p<0.05), Also There Was Statistically Significant Effect Of Canal Curvature On The Degree Of Canal Transportation After Instrumentation (p>0.05), As There Was Statistically Significant Difference In Canal Transportation In Both Subgroups (?5?-25?? And ?25?-45??). SEM Analysis Showed A Range Of Defects Detected On ?both Files? In Their New As Well As In Their Used Condition. Defects As Strips, Debris, Pitting Micro-fracture, Cracks, Corrosion, Fretting And Scrapping. Conclusion: It Was Found That WaveOne Gold Reciprocating File Is Superior In Preserving Canal Curvature Than WaveOne File