Influence of Cyclic Flexural Deformation on the Torsional Resistance of Controlled Memory and Conventional Nickel-titanium Instruments

Torsional fatigue resistance of pathfinding instruments manufactured from several nickel‐titanium alloys

“…, Acosta et al . ). The results revealed that Logic size 25, .01 taper had significantly higher torsional strength values when compared with all the groups ( P < 0.05).…”

“…, Acosta et al . ). The Hyflex GPF size 15, .01 taper and size 15, .02 taper had the lowest torsional strength values when compared with the other groups ( P < 0.05).…”

“…, Acosta et al . ). However, CM of NiTi is not always superior to the conventional NiTi Wire or M‐Wire, because other factors, such as cross‐sectional design, core mass, taper and tip size (Ninan & Berzins , Shen et al .…”

Comparison of Shaping Ability of 10 Rotary and Reciprocating Systems: an In Vitro Study with AutoCAD

“…Iqbal et al ( 37 ) studied the percentage of instrumented areas with ProFile® and a hybrid technique using lqFiles and H-files at 1 and 3mm from working length; the hybrid technique with lqFiles was significantly better than the other techniques (P<0.05), but there were no significant differences between the two hybrid techniques at 3mm (P>0.05). In 2015 ( 23 ), the authors of the present study used similar methodology to compare ( 21 ) F360®, RaCe®, Mtwo® and Hyflex CM® files, obtaining and no significant differences (P>0.05). However, all of the files used in the 2015 study had the same taper (4%) and size (#35), which are important factors in any investigations into the ability.…”

“…Gold-Wire is another alloy that has recently appeared, enhancing the properties of ProTaper Universal® (Dentsply Maillefer, Ballaigues, Switzerland) and Wave One® (Dentsply Maillefer, Ballaigues, Switzerland), to create ProTaper Gold® (Dentsply Maillefer, Ballaigues, Switzerland) and Wave One Gold® (Dentsply Maillefer, Ballaigues, Switzerland) ( 16 , 17 ), with a new thermal surface treatment ( 18 ). CM-Wire is an alloy that gives Hyflex CM® (Coltene, Altstätten, Switzerland), Hyflex EDM® (Coltene, Altstätten, Switzerland) and Neoniti® (Neolix, Chatres-La-Foret, France) instruments controlled memory, which is very useful when treating root canals with severe curvatures ( 19 - 21 ), manufactured with wire cut electrical discharge machining (EDM) process ( 22 ). The current systems have many different taper, movement, design, alloy, speed and torque characteristics and different numbers of files.…”