dental gross block comprising a presintered zirconia porous material, process for its production and dental article formed from said dental gross block

摘要

A dental block comprising a pre-sintered porous zirconia material, the process of its production and a dental article formed from said dental block. The invention relates to a dental prosthesis rough block comprising a porous zirconia material. The pre-sintered zirconia porous material shows an adsorption of type iv isotherm n2 according to the iupac classification, the pre-sintered zirconia porous material having a vickers hardness of from about 25 to about 150 µm. , the raw dental machining block comprises means for reversibly attaching it to a machining device. The invention also relates to a process of producing a zirconia dental article comprising the steps of providing a crude dental prosthesis machining block comprising a porous pre-sintered zirconia material, placing the dental prosthesis machining raw block into a machining device, machining the porous zirconia material and a dental article obtained by such a process.