Features: it is the best strength of all ceramic basement for the denture crown, it is named as the steel ceramic with a super chewing performance, excellent biocompatibility, no allergic, no stimulation, it is hailed as the biological ceramics in the 21th century, widely used in every medical courses. It has good translucency which can show the orthodont’ s color, no any black on the gum even used in mouth for a long time. Zirconia crown has wide range of indication, it is used for the substrate of the single crown and mutiple units of anterior teeth and posterior pontic, no any impact to nuclear magnetic resonance. Technical parameter Shade White translucent Density > 6.04 g/ cm3 Flexural Strength 1000 MPa Comprehensive Strength 3000 MPa Impact Resistance 8.0 MPa* m½ Modulus of Elasticity > 205 GPa Vickers Hardness 1300 HV 0, 5 Thermal Expansion 10-6 K-1 10