Figure 2.
Measuring device of the maxillary incisor mounted on a six-component force/moment sensor with the relevant coordinate system. The resulting forces and moments were recorded in the x, y, and z-axis, defined as Fx, Fy, Fz and Mx, My, Mz, respectively. Fx represented the vestibular-palatal force (+Fx, −Fx), Fy represented the mesiodistal force (+Fy, −Fy), and Fz represented the intrusive-extrusive force (−Fz, +Fz).