The RTL test showed that the VTP group had the highest NRCF among the test groups, while the PTN group had the least NRCF (p < 0.05).
Test method File RTL method NRCF STL method Ultimate strength (N-cm) V-Taper 2 5454 [+ or -] 1790 (a) 1.70 [+ or -] 0.19 (a) HyFlex EDM 2373 [+ or -] 820 (b) 1.35 [+ or -] 0.16 (b) ProTaper Next 855 [+ or -] 237 (c) 0.83 [+ or -] 0.05 (c) (a,b,c) Different superscript letters indicate significant differences between groups in vertical column (p < 0.05).
2 (Paris: Librairie des Bibliophiles, 1872-90), 242-56; not included in NRCF.
837, which NRCF designates "A." NRCF's critical edition follows two other MSS (of four) to read "bele et gente et avenant."
(22) See, for example, the editors' note to lines 379-80 in NRCF 2.