The test was measured with an Instron universal test machine
with a 50 N load cell. It was performed by applying a counterclockwise
rotation to the mini-implant at a rate of 0.1o/s. To obtain
alignment between the mini-implant and the axis of the Instron
universal test machine, a device was designed and machined (Fig. 2).
Hence, there was only torsional load during the torque test, avoiding
bending moment.