Dental apparatuses and instruments, namely, therapeutic mouthpieces for the prevention and treatment of bruxism, snoring, sleep apnea and other sleep and deglutition disorders; orthodontic appliances; orthodontic instruments; orthodontic braces; splints for orthodontic purposes; dentures; teeth protectors for dental purposes; dental mouthguards for medical purposes; dental orthoses being orthodontic instruments; therapeutic devices, namely, mouthguards and teeth protectors for the prevention ...