Dental fillings have come a long way since mercury amalgams. Mixed into dental composites, Ytterbium Fluoride provides the radio-opacity that allows dentists to identify a filling under X-ray, while due to its high transparency the tooth-like appearance of the filling remains unaffected. Sukgyung AT’s YBF series shows the best transparency as well as the highest radio-opacity in the market today, and is already being used by the leaders of dental composite industry. Various particle sizes are available for optimal application.