An In Vitro Comparison of Torsional Stress and Cyclic Fatigue Resistance of ProFile GT and ProFile GT Series X Rotary Nickel-Titanium Files

Comparison of Conventional and New-generation Nickel-Titanium Files in Regard to Their Physical Properties

“…Cyclic fatigue is caused by repetitive compressive and tensile stress acting on the outer and inner curves of a file rotating in a curved canal (6). Shear fractures of the material subsequently occur when the maximum strength of the material is exceeded (7). During the manufacture of Ni-Ti instruments, small machining scratches and grooves are invariably left on the surface (8).…”

Cyclic fatigue resistance of OneShape and WaveOne instruments using different angles of curvature

“…The M-Wire technology offers NiTi instruments with greater flexibility and resistance to cyclic fatigue than those made of regular superelastic wires 29) . On the other hand, some studies reported that M-Wire instruments did not show better cyclic fatigue resistance when compared with conventional rotary NiTi instruments 8,30) . Capar et al 31) reported that there was no significant difference in cyclic fatigue resistance between OS instrument and another instrument made of M-Wire alloy.…”

Evaluation of Apical Transportation And Centering Ability of Three Different NITI Endodontic Files- A Comparative In Vitro CBCT Study

“…5 Recently, thermal treatment of NiTi alloy has been used to optimize the mechanical properties of NiTi alloy. [6][7][8][9][10][11] The newer Protaper next (Dentsply Tulsa Dental Specialties) file system is designed with rectangular cross section design for greater strength. The patented design"s axis of rotation differs from the center of mass.…”