10 Cut-off and abrasive wheels for dental purposes; Dental bite trays; Dental impression trays; Dental instruments, namely, mercury, cleaners, bridge repair outfits, articulators, impression trays, compound outfits, wheel truers, temporary stoppings, silver alloys, root canal fillings, buffing brushes, buffing felts, electric heating appliances, impression taking outfits, tooth polishing brushes, articulating appliances and dental engines