Patent · US Active

Dental blank and method of making a dental ceramic blank

US8425812B2 · kind B2 · utility

4Cited by

40References

14Claims

0Family size

Assignee

3M INNOVATIVE PROPERTIES COMPANY · US

Inventors

Ingo Wagner · Herrsching am Ammersee, DE
Martin Goetzinger · Unterschleißheim, DE
Thomas Sprengart · Landsberg, DE

Key dates

Filing date	Oct 10, 2008
Grant date	Apr 23, 2013
Priority date	—
Expiry date	Aug 23, 2029

Classification

Technology area (CPC C)Chemistry; Metallurgy
CPC primaryC04B2235/9661
WIPO fieldMaterials, metallurgy
WIPO sectorChemistry

Abstract

A method of making a dental blank comprises the steps of independently compacting a first and second zone of a quantity of ceramic particles. During compacting, the first and second zones have different compaction factors in at least one stage. Such blanks may be pre-sintered and used in the manufacture of dental restorations. The method may help in controlling the homogeneity of the material structure during manufacturing the blanks.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.