[ Dental instruments and apparatus, namely, picks, burrs, dental handpieces, disposable prophy angles, oral irrigators, crown and bridge removers, apex locators and excavators; dental appliances, apparatus, instruments and tools, namely, dental articulators and replacement parts therefor, facebows, axis mounting devices for medical x-ray negatives, ] tooth cleaning and polishing instruments in the nature of sprayers for cleaning gums and teeth used in dentists' offices during dental procedure...