5 materials for teeth prosthesis, namely, [dental amalgams, metals, precious metals and alloys thereof, metal ceramics,] ceramics[, resins and plastics]; materials for facing artificial teeth and teeth prosthesis, namely, [metals, precious metals and alloys thereof, metal ceramics,] ceramics[, resins, plastics, dental stains and dental margin; materials for stopping teeth, sealing materials for dental use, namely, investment materials, duplicating materials, fixing materials and impression materials for dental use]