Patent ID: 7780907

Claim:
A process for the production of a dental prosthetic item ( 10 ) by means of local sintering, in which said dental prosthetic item ( 10 ) is produced layer-wise in the individual layers of powder of a sinterable material ( 6 ) by energy input by means of an energy transferring beam ( 7 ), wherein one or more parameters of the sintering process are modified during production such that the material ( 6 ) is regionally sintered to various degrees to produce denser material in the marginal region ( 14 ) of a sintered layer of said dental prosthetic item ( 10 ) than is produced in the inner region ( 15 ) of said sintered layer, said marginal area ( 14 ) of the layer to be sintered being sintered to a density of more than 95% of the theoretically possible density and the inner region ( 15 ) of the layer to be sintered is sintered to a density of from 80% to 95% of the theoretically possible density, with the build-up rate in the marginal region ( 14 ) being from 1 mm 3 /s to 2.3 mm 3 /s and the energy input of the beam ( 7 ) per unit area being from 1.3 J/mm 2 to 8 J/mm 2 , while the build-up rate in the inner region ( 15 ) is from 2.3 mm 3 /s to 5 mm 3 /s and the energy input of the beam ( 7 ) is from 0.5 J/mm 2 to 1.8 J/mm 2 .