10 Dental and dental-technical instruments and apparatus, namely, laser welding apparatus for dental alloys, attachments for the connection of dentures and artificial teeth to natural teeth, root canal posts; devices for the preparation and processing of dental materials, namely, devices for the dosage, mixing, forming of dental materials as well as for the surface processing and surface treatment of dental materials; clamps of metal and synthetics for dental materials during treatment; dental flasks; embedding forms, namely, bite trays as an aid for dental purposes; artificial teeth, dental crowns, dental bridges, dental prostheses, dental prosthesis parts; metal-melting devices and melting devices for dental purposes; radiation units and polymerization devices for the hardening of synthetics for dental purposes; blast devices for use in treatment of surfaces for dental purpose; and galvanic baths for dental use