Dental apparatus, devices and instruments, including: dental prostheses and intra-oral devices and apparatus of all kinds; mouthguards; artificial teeth; apparatus for treating bruxism and preventing tooth grinding; non-surgical oral appliances of all types; bite guards; occlusal splints; braces including brackets, bands and archwires; implant abutment devices; dental appliances for the relief of snoring; tongue positioning devices; fixed prosthetics; patient removable overdentures; retrievable prosthetics; dental technician services; dentists, and services associated therewith, including manufacture, marketing, supply and fitting of dental apparatus, devices, and instruments of the aforementioned type