Metallic or non-metallic materials for dental offices and laboratories, particularly precious metals and their alloys of non-precious metals, metal fused to porcelain, precious and non-precious alloys for porcelain-fused-to-metal technique and resins used for making crowns, bridges, plates and auxiliary parts for dental prostheses; castings for dental offices and laboratories, namely bridges, crowns, plates and auxiliary parts for dental prostheses; coatings, dental impression pastes, copying...