It is described an arrangement (230, 330, 430, 530) and a method for tracking a movement of an upper jaw (100) relative to a lower jaw (120), the arrangement comprising: a lower mounting structure (231) mountable relative to the lower jaw (120)； at least one lower motion sensor system (233) mounted at the lower mounting structure； and at least one data transmission unit (127) adapted to transmit measurement data (245) from the lower motion sensor system to an analysis unit (239).
