Abstract: An intraoral device makes a new treatment of dental problems possible. The device includes electronic circuitry, including a proximity detector, a variable time delay, a signal generator and a power supply, to sense and record the frequency and duration of unwanted or undesirable relative positions of body parts within the oral cavity. The recorded data stored by the circuitry enables a dentist to chart the progress of a patient during treatment and diagnose whether functional problems exist which require a specific treatment plan. The undesirable position may be teeth clenched, jaw open with teeth unclenched, tongue pressed against the teeth or a retruded portion of the lower jaw. When these positions have been assumed for too long, a signal reminds the patient. This automatic signal makes it possible for the patient to unlearn bad habits or learn new habits.