CHEMICAL PREPARATIONS FOR DENTAL AND DENTAL TECHNOLOGY PURPOSES; TOOTH-FILLING AGENTS; IMPRESSION, DOUBLING, EMBEDDING, AND CASTING COMPOUNDS AND LOWER-LINING MATERIALS FOR DENTAL AND DENTAL-TECHNOLOGY PURPOSES; DENTAL CERAMICS AND DENTAL PLASTICS IN LIQUID, PASTE, OR POWDERED FORM FOR MAKING AND REPAIRING CROWNS, BRIDGES, PROSTHESES, PROSTHETIC COMPONENTS, GUM PLATES, AS BLENDING MATERIAL AND FILLING MATERIAL; PLASTIC IN THE RAW STATE AND SEMIFINISHED FOR MAKING ARTIFICIAL BODY PARTS; PLASTI...