Preparations and substances, all for dental use; chemical products for dental purposes; dental alloy and porcelain powder for use in fabricating crowns and bridges in the mouth; dental amalgams; alloys of precious metals for dental use; dental cement; dental impression material; dental abrasives; dental mastic; dental lacquers; adhesives for dentures and dental use; teeth filling material; dental filling agents; dental wax; materials and substances for stopping teeth; mouth washes for medicinal and dental purposes; disinfectant; materials for dressing; plasters; cotton for medicinal and dental purposes