Lithium silicate glass ceramic and method for fabrication of...

Details Lithium silicate glass ceramic and method for fabrication of... Lithium silicate glass ceramic and method for fabrication of...

2011-02-22

2011-02-22

Group, Karl E (Department: 1731)

Compositions: ceramic

Ceramic compositions

Devitrified glass-ceramics

C106S035000

Reexamination Certificate

active

07892995

ABSTRACT:
The present invention relates to preparing an improved lithium silicate glass ceramic for the manufacture of blocks for dental appliance fabrication using a CAD/CAM process. The lithium silicate material has a chemical composition that is different from those reported in the prior art including 8 to 10% of germanium dioxide in the final composition. The softening points are close to the crystallization final temperature of 830° C. indicating that the samples will support the temperature process without shape deformation. The resulting material has improved castability and higher density.

REFERENCES:
patent: 5698019 (1997-12-01), Frank et al.
patent: 6342458 (2002-01-01), Schweiger et al.
patent: 6455451 (2002-09-01), Brodkin et al.
patent: 7381258 (2008-06-01), Krumbholz
patent: 2005/0155518 (2005-07-01), Krumbholz
patent: 2005/0288165 (2005-12-01), Krumbholz

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