US 5,192,472 AGranted

Method for producing a ceramic article

AssigneeNobelpharma AB

InventorMatts Andersson

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Abstract

A method of producing an article of ceramic material for replacement of a lost substance or tissue in the human body includes making a model having a contour of the article to be produced and positioning in a copying machine the model and a blank from which a tool is to be made. The contour of the model is sensed by sensing devices and transmitted to the blank. The model contour is linearly enlarged by use of mechanical procedures so as to define a linearly enlarged contour on the blank. After the enlarged contour has been defined on the blank, a tool is formed from the blank which has a contour corresponding to the linearly enlarged contour. The ceramic starting material is applied and compacted over the contour of the tool to produce an article with a corresponding enlarged contour. Finally, the article is removed from the tool and is treated in at least one sintering procedure such that the article with the enlarged contour is subjected to linear shrinkage until the size of the article contour corresponds to that of the model contour.

Claims21

Dependent claims

A method for producing an article of ceramic material for replacement of lost substance of tissue in the human body, said method comprising the steps of:

a) making a model having a contour of the article to be produced;
b) positioning both said model and a blank from which a tool is made in a copying machine having sensing members and mechanical members;
c) sensing the contour of said model and transferring said contour towards said blank by said sensing members of said copying machine;
d) linearly enlarging said contour transferred towards onto said blank by said mechanical members of said copying machine to provide a linearly enlarged contour for said blank;
e) forming from said blank a tool which has a contour corresponding to said linearly enlarged contour is capable of withstanding high pressures and of maintaining high accuracy;
f) applying and compacting a ceramic starting material over said contour of said tool to produce an article with an enlarged contour;
and
g) removing said article from said tool and sintering said article whereby said article linearly shrinks until said article contour corresponds to said model contour.

5 more elements

Dependencies are inferred from the claim text.