It include that bottom B has composition the present invention relates to a kind of porous multilayer colored zirconium oxide dental mill blank,It includes have CER-COMP-B COMP-B ceramic components,And stabilize the color component COL-COMP-B STAB-COMP-B of ingredient,Top layer E has composition,It includes have CER-COMP-E COMP-E ceramic components,Color component COL-COMP-E STAB-COMP-E stablize at least one middle layer of component,COMP-E top layers E is formed from having,At least one middle layer case has composition COMP-B bottoms B,X is the middle layer of integer and quantity,Wherein the layer composition and COMP-E COMP-B are arranged in alternating sequence,And the wherein thickness B of this layer,The thickness and layer E that bx reduces from bottom to top,It does not reduce from top to bottom.Dentistry mill blank can be used for producing dental article.
