The sensor uses an accelerometer to monitor mouth activity

Tooth fillings acting as radio receivers may be nothing more than a myth, but scientists at the National Taiwan University are developing an artificial tooth that would send rather than receive transmissions. They’re working on embedding a sensor in a tooth to keep an eye on oral goings on, along with a Bluetooth transmitter to transmit the data and tell your doctor what your mouth’s been up to.

Scientists developing Bluetooth tooth that spies on your oral habits