Abanoub Raouf , Magdy Mohammed And Reham Hassan,
ABSTRACT
Aim: The Aim Of This Study Was To Measure The Root Canal Transportation And Centering Ability Of XP-shaper And Compare It With TRUShape And Hyflex EDM Ni-Ti Rotary System.
Materials&Methods: Sixty Human Permanent Mandibular First Molars Were Decoronaized, Distal Roots Were Separated From The Mesial Ones. The Working Length Of Each Canal Was Determined By Subtracting 1 Mm From The Apical Foramen Before Scanning. All The Roots Were Scanned Using Cone Beam Computed Tomography (CBCT) To Detect The Canal Shape Before Instrumentation. Samples Were Randomly Divided Into 3 Equal Groups (n = 20 Canals Per Group) As Follow: Group I; Roots Were Mechanically Prepared Using Hyflex EDM Single File (size 25/~), Group II; Roots Were Mechanically Prepared Using TRUShape File (size 30, Taper 0.04) And Group III: Roots Were Shaped Using The XP-shaper File (size 30, Taper 0.01). The Root Canals Were Scanned After The Mechanical Preparation Using CBCT Then Pre And Post Instrumentation Scans Were Superimposed To Evaluate The Degree Of Transportation As Well As The Centering Ability Of The Tested Instruments. Data Were Analyzed Using Kruskal-Wallis Test For Comparing The Three Systems, While Friedman?s Test Was Used To Compare Between The Root Levels.
Results: Results Displayed That, As Regards The Total Amount Of Transportation, There Was No Statistically Significant Difference Between The Three Systems. By Comparing Between The Root Levels, TRUShape System Showed That There Was No Statistically Significant Difference Between 3 And 5 Mm Levels; Both Showed Statistically Significantly Higher Median Amount Of Transportation Than 7 Mm Level. As Regards The Total Centering Ratio, Hyflex EDM Showed The Statistically Significant Highest Median Centering Ability.
Conclusions: It Was Concluded That The Three Rotary Systems Preserved The Original Canal Anatomy Regarding That Hyflex EDM Possess The Highest Centering Ability.
