Medical and dental instruments, namely, dental burrs, dental picks, dental mirrors, dental ultrasonic handpieces and tips therefor, sprayers for cleaning gums and teeth, dental drills, cavity preparation instruments, namely, oral irrigators, dental scalpels; x-ray appliances for dental and medical use, namely, extra-oral and intra-oral lighting devices, namely, dental lamps, intraoral electromagnetic medical diagnostic imaging apparatus and intraoral digital sensor used for taking digital dental radiographs, replacement parts of all of the above instruments and appliances; dental prophylactic instruments, namely, polishing instruments; special furniture for medical and dental use, namely, dental examination chairs, dental patient treatment chairs with or without basins for rinsing the mouth, treatment sites for oral prophylactics primarily comprising a dental patient examination chair and dental instruments, as listed above in this class, namely, dental burrs, dental picks, dental mirrors, dental ultrasonic handpieces and tips therefor, sprayers for cleaning gums and teeth, dental drills, cavity preparation instruments, namely, oral irrigators, dental scalpels, connection consoles for dental handpieces, instrument cabinets, dentists' elements, dental assistant's elements, treatment tables, footrests, sinks, cuspidors, lamps, trolleys; treatment units for oral prophylactics primarily comprising a medical patient treatment seat and dental instruments, namely, dental burrs, dental picks, dental mirrors, dental ultrasonic handpieces and tips therefor, sprayers for cleaning gums and teeth, dental drills, cavity preparation instruments, namely, oral irrigators, dental scalpels, dental treatment seats with or without basins for rinsing the mouth, extra-oral and intra-oral lighting devices for medical use, namely, lamps for medical and dental use; optical measuring appliances for medical and dental use, namely, intra-oral and extra-oral scanning appliances, namely, dental cameras; intraoral scanners, intraoral X-ray sensors used for taking digital dental radiographs; grinding machine for medical and dental ceramics as well as for materials suitable for tooth restoration and artificial teeth, namely, dental prostheses for parts of teeth; X-ray apparatus for medical and dental use, dental instruments and apparatus for planning and realization of dental prostheses and implants, namely, computer controlled machining devices, namely, grinding machines for medical and dental ceramics, dental burrs, dental drills