Fastenable device for oral cavity position detection

A fastenable device comprising:

• a housing comprising a base portion, a head portion opposite to the base portion, and a body portion between the base portion and the head portion, wherein the base portion comprises a first fastener in the form of a full ring integral to the housing and defining a through-hole, and wherein the head portion comprises a second fastener in the form of an open ring integral to the housing and defining a snappable recess;
• a frequency generator housed in the housing and electrically connected to an electrode pair disposed on the housing, for applying a voltage with at least two different frequencies between the electrodes;
• an accelerometer providing accelerometer data;
• an impedance-measure unit in communication with the electrode pair and providing impedance-measurement data;
• and
• a wireless transmitter in communication with the accelerometer and the impedance measure unit.