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Table 6 Comparison of the accuracy and repeatability depending on the part of the beam aligned with the scale

From: Experimental study on the factors affecting torque of beam-type implant torque wrenches

Manufacturers Target torque value (N cm) Part of the beam aligned Bias (%) Minimum Maximum Mean SD Coefficient of variation (%)
Strauman 15 Leading edge − 18.67 11.5 12.7 12.20 0.45 3.66
Center − 4.00 14.0 14.9 14.40 0.37 2.60
Trailing edge 14.27 16.7 17.8 17.14 0.37 2.14
Nobel Biocare 15 Leading edge − 10.27 13.0 13.9 13.46 0.38 2.85
Center − 2.80 14.3 15.0 14.58 0.24 1.65
Trailing edge 11.87 16.5 17.0 16.78 0.19 1.16
Kyocera 20 Leading edge − 6.00 18.2 19.2 18.80 0.34 1.81
Center 2.60 19.9 20.8 20.52 0.32 1.55
Trailing edge 14.20 22.3 23.1 22.84 0.28 1.23
GC 10 Leading edge − 40.60 4.0 6.8 5.94 1.00 16.80
Center 2.80 9.7 10.8 10.28 0.45 4.33
Trailing edge 35.00 12.8 13.9 13.50 0.39 2.85
KTC 15 Leading edge − 10.67 12.2 13.8 13.40 0.61 4.55
Center − 5.07 13.9 14.6 14.24 0.27 1.92
Trailing edge 3.07 15.2 15.6 15.46 0.15 0.97
Nippon Piston Ring 20 Leading edge − 16.60 16.1 17.1 16.68 0.44 2.61
Center 0.50 19.8 20.3 20.10 0.17 0.83
Trailing edge 10.90 20.9 24.0 22.18 1.19 5.37
THOMMEN 15 Leading edge 3.07 15.0 15.8 15.46 0.29 1.86
Center 10.53 16.0 16.8 16.58 0.31 1.88
Trailing edge 18.53 17.5 18.0 17.78 0.20 1.15
SHOFU 10 Leading edge 1.40 9.5 11.0 10.14 0.48 4.77
Center 35.80 12.9 14.0 13.58 0.39 2.85
Trailing edge 89.40 18.2 19.9 18.94 0.59 3.11