Electronic personal health monitoring devices for use in monitoring patient compliance in use of orthodontic and sleep disorder oral appliances; Medical diagnostic devices and instruments for recording and amplification of signals from the body, for use in the treatment of sleep, snoring and sleep apnea; Diagnostic recorder used to amplify and store physiological signals originating in the body; Medical dental sleep appliance for the treatment of obstructive sleep apnea; medical devices for use in gathering, processing and transmitting medical information in the form of patient health information; an apparatus for recording medical data, namely, a micro recorder that is worn inside the mouth and used to record signals when embedded within or on an oral appliance