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Table 2 Median values for torque and maximum torque reached during distal root canal preparation using WOGL and RBR40 files

From: Analysis of reciprocating system real-time torque variation during root canal preparation

Instrument Third Median of torque Ncm (min–max) Median of maximum torque Ncm (min–max) Time (s)
WOGL Cervical 30.5 (13–62)
Middle 0.15 (0.10–0.50) 0.30 (0.10–0.70)
Apical 0.12 (0.10–0.70) 0.55 (0.10–1.70)
RBR40 Cervical 0.15 (0.10–0.20) 0.20 (0.10–1.0) 27.5 (8–82)
Middle 0.15 (0.10–0.50) 0.17 (0.10–0.30)
Apical 0.17 (0.10–0.30) 0.65 (0.10–2.10)