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AssigneeJeneric/Pentron Incorporated
InventorsCarlino Panzera, Dmitri Brodkin, Paul Panzera
Estimating the term…
Ceramic precursor powders are combined with a binder and pressed into blocks or similar shapes to form green bodies. The ceramic powders consist of fairly uniform particles thoroughly dispersed to be essentially free of agglomerates such that it will sinter predictably and isotropically without appreciable distortion. The green bodies may be soft-sintered to a bisque density less than about eighty five percent of the final density. The soft-sintered blocks are then milled to a desired shape and sintered to a final density rendering a high strength dental restorative material. The material may be aluminum oxide, partially stabilized zirconium oxide, mixtures of the two, mullite or any suitable oxide that may be sintered to high strength (i.e., greater than 250 MPa).
A method of manufacturing a dental restoration comprising:
A method of manufacturing a dental restoration comprising:
Green blocks for use in the manufacture of dental restorations comprising powder selected from ceramic, glass-ceramic powder and mixtures thereof, and one or more binders, wherein the blocks have a density of from about fifty percent to about seventy five percent of the theoretical density of the powder after it has been fully sintered and wherein the blocks shrink substantially isotropically during sintering.
Soft sintered blocks for use in the manufacture of dental restorations comprising powder selected from ceramic, glass-ceramic powder and mixtures thereof, and one or more binders, wherein the blocks have a bisque density less than about eighty five percent of the theoretical density of the powder;
Soft sintered blocks for use in the manufacture of dental restorations comprising powder selected from ceramic, glass-ceramic powder and mixtures thereof, and one or more binders, wherein the blocks have a bisque density less than about seventy five percent of the theoretical density of the powder;
Dependencies are inferred from the claim text.