Table 1 – Mean Cyclic Fatigue (Time in seconds), Torque (Ncm), and
Angle of Rotation (º) of the Instruments tested.
Different upper letters on columns indicate statiscal differences among
groups after ANOVA one-way and post-hoc of Tukey (P < 0,05).
FIGURES
Figure 1 - Scanning electron microscopy images of the fractured surfaces
of separate fragments after torsional testing (first row: A, a = Flat
File 25.04; second row: B, b = ProDesign Logic2 25.03; bottom row: C, c
= Prodesign Logic2 25.05). The left column shows images with the
circular boxes indicating concentric abrasion marks at × 200
magnification; the right column shows concentric abrasion marks at ×
1000 magnification; and the skewed dimples near the center of rotation
are typical features of torsional failure.
Figure 2 - Scanning electron microscopy images of the fractured surfaces
of separated fragments of cyclic fatigue testing (first row: A, a = Flat
File 25.04; second row: B, b = ProDesign Logic2 25.03; bottom row: C, c
= Prodesign Logic2 25.05). The crack origins are identified by circular
boxes. The images show numerous dimples spread on the fractured
surfaces, which constitute a typical feature of ductile fracture.