Medical devices for treating sleep apnea, nocturnal gastroesophageal reflux and heartburn, headaches, sleep-related hypertension, secondary REM sleep behavior disorder, nocturnal bedwetting, sleep-walking, nightmares and night terrors, nocturnal bruxism; Medical devices for the prevention of sports concussions and chronic traumatic encephalopathy; Medical devices for the prevention of sleep apnea, nocturnal gastroesophageal reflux and heartburn, headaches, sleep-related hypertension, secondary REM sleep behavior disorder, nocturnal bedwetting, sleep-walking, nightmares and night terrors, nocturnal bruxism; Medical devices for diagnosing sleep apnea, nocturnal gastroesophageal reflux and heartburn, headaches, sleep-related hypertension, secondary REM sleep behavior disorder, nocturnal bedwetting, sleep-walking, nightmares and night terrors, nocturnal bruxism; A mandibular and lingual repositioning device for diagnosing and treating sleep apnea, nocturnal gastroesophageal reflux and heartburn, headaches, sleep-related hypertension, secondary REM sleep behavior disorder, nocturnal bedwetting, sleep-walking, nightmares and night terrors, nocturnal bruxism; Medical apparatus for monitoring vital signs of patients; Medical devices for monitoring cardiac and neurological functions; Wearable drug delivery device, sold empty, for the prevention of certain cardiac and neurological events and for the restoration of cardiac and neurological functions; Therapeutic apparatus, namely, an oral appliance for the management and prevention of sleep disorders; Medical device diagnosing and treating sleep apnea, nocturnal gastroesophageal reflux and heartburn, headaches, sleep-related hypertension, secondary REM sleep behavior disorder, nocturnal bedwetting, sleep-walking, nightmares and night terrors, nocturnal bruxism using artificial intelligence; Medical devices used in aerospace travel for the prevention of sleep apnea and reduce the impact of G forces, nocturnal gastroesophageal reflux and heartburn, headaches, sleep-related hypertension, secondary REM sleep behavior disorder, nocturnal bedwetting, sleep-walking, nightmares and night terrors, nocturnal bruxism; Medical devices with sensors that help athletes train better and improve performance level, namely, pH (detect acid reflux), carotid blood flow (CMUT/IVUS/micro ultrasound sensor), EKG, oxygen levels through pulse oximetry, EEG (Electro-encephalography), EMG (Electro-myography), EOG (Electro-Oculography), snore-detecting microphone, airflow sensor, air pressure sensor, temperature sensor and GPS data