Bite force measuring system and mouthpiece

A method for calibrating a mouthpiece comprising a body, the body comprising a fluid-filled compressible cavity, the method comprising:

• repeating the following steps a plurality of times:
• applying a load on the body of the mouthpiece to exert a force on a fluid contained in the fluid-filled compressible cavity;
• measuring by a fluid-pressure-sensing device of the mouthpiece a pressure of the fluid contained in the fluid-filled compressible cavity;
• and
• transmitting the value of the exerted force and the measured pressure to a computing device;
• determining by a processing unit of the computing device calibration parameters of the mouthpiece based on the values of the plurality of exerted forces and the corresponding plurality of measured pressures, the calibration parameters allowing the calculation of a bite force based on the calibration parameters and a corresponding measured pressure;
• transmitting the calibration parameters from the computing device to the mouthpiece;
• and
• storing the calibration parameters in a memory of the mouthpiece;
• wherein the body of the mouthpiece defines first and second branches intersecting at a fore end and having a concave cross-section to mate with an individual's dental occlusion, the body forming a generally horseshoe shaped member, a thickness of the first and second branches increasing from respective back ends of the first and second branches towards the fore end.