Table 7 Comparison of the accuracy and repeatability according to the angle at which the examiner read the torque value
From: Experimental study on the factors affecting torque of beam-type implant torque wrenches
Manufacturer | Target torque value (N cm) | Angle at which the examiner read the torque value | Bias (%) | Minimum | Maximum | Mean | SD | Coefficient of variation (%) |
|---|---|---|---|---|---|---|---|---|
Strauman | 15 | 90° | − 0.53 | 14.5 | 15.4 | 14.92 | 0.33 | 2.22 |
60° | − 10.67 | 12.6 | 13.9 | 13.40 | 0.47 | 3.50 | ||
30° | − 20.80 | 10.9 | 13.0 | 11.88 | 0.94 | 7.89 | ||
Nobel Biocare | 15 | 90° | − 1.87 | 14.2 | 15.1 | 14.72 | 0.33 | 2.25 |
60° | − 15.60 | 12.2 | 13.1 | 12.66 | 0.32 | 2.53 | ||
30° | − 51.20 | 6.6 | 7.6 | 7.32 | 0.38 | 5.14 | ||
Kyocera | 20 | 90° | 3.30 | 20.4 | 20.9 | 20.66 | 0.19 | 0.90 |
60° | − 9.10 | 17.7 | 18.6 | 18.18 | 0.33 | 1.82 | ||
30° | − 14.00 | 16.5 | 19.0 | 17.20 | 0.91 | 5.29 | ||
GC | 10 | 90° | 6.60 | 10.4 | 10.8 | 10.66 | 0.17 | 1.63 |
60° | − 7.00 | 8.8 | 9.8 | 9.30 | 0.42 | 4.52 | ||
30° | − 23.80 | 6.5 | 8.8 | 7.62 | 0.80 | 10.50 | ||
KTC | 15 | 90° | 1.87 | 15.1 | 15.6 | 15.28 | 0.19 | 1.27 |
60° | − 0.27 | 14.6 | 15.5 | 14.96 | 0.32 | 2.14 | ||
30° | − 1.33 | 14.1 | 15.5 | 14.80 | 0.52 | 3.53 | ||
Nippon Piston Ring | 20 | 90° | 1.20 | 19.8 | 20.8 | 20.24 | 0.34 | 1.70 |
60° | − 4.90 | 18.6 | 19.6 | 19.02 | 0.33 | 1.71 | ||
30° | 7.10 | 19.4 | 23.4 | 21.42 | 1.31 | 6.12 | ||
THOMMEN | 15 | 90° | 10.40 | 15.6 | 17.4 | 16.56 | 0.63 | 3.83 |
60° | 4.53 | 15.3 | 16.0 | 15.68 | 0.28 | 1.78 | ||
30° | 2.13 | 14.5 | 16.0 | 15.32 | 0.58 | 3.77 | ||
SHOFU | 10 | 90° | 45.20 | 14.1 | 15.1 | 14.52 | 0.34 | 2.32 |
60° | 11.80 | 10.5 | 11.3 | 11.18 | 0.67 | 5.95 | ||
30° | − 19.20 | 7.5 | 8.8 | 8.08 | 0.44 | 5.45 |