Measuring apparatuses and instruments for measuring dental clenching, quality of sleep and deglutition in connection with the prevention and treatment of bruxism, snoring, sleep apnea and other sleep and deglutition disorders; transceivers; wearable computers in the nature of smartwatches and wearable activity trackers, all for assessing and measuring dental clenching, quality of sleep and deglutition; smartwatches for assessing and measuring dental clenching, quality of sleep and deglutition...