KATANA Zirconia are pre-sintered zirconia discs with a diameter of 98.5 mm with a plastic ring. There are 5 variants available: UTML – for monolithic anterior fillings and veneers, STML – for aesthetic restorations with balanced strength, YML – zirconia with graduated color and translucency, HTML plus – for long bridges with high strength and natural appearance, HT – classic high-strength zirconia for restorations and long bridges.