Table 2: Cross-sectional area and inner core area at 3 mm cross sections from tip of the tested instruments.

GroupCross-sectional area (μm2)Inner core area (μm2)

OS90,69755,992
PTN101,25554,321
V2H110,29564,774
NRT135,95783,905

OS, One Shape; PTN, ProTaper NEXT; V2H, V taper 2H.