1. The zirconia block is an abbreviation of Multilayer; 2. Compare to white and single layer pre-shaded block, 5D multilayer zirconia block features translucent, strength and shade that is variational in 1 dimension; 3. It is a realistic and natural material which come true variation from dentin zone to incisal zone in progressive transition. In dentin zone, The characteristic of strength and fracture toughness is high. In incisal zone, it has nature crystal translucency, aesthetic effect is desirable and low abrasion to jaw teeth.