Lisa R Kaiser

US Patent:

6660073, Dec 9, 2003

Filed:

Aug 8, 2000

Appl. No.:

09/634476

Inventors:

Carlino Panzera - Belle Mead NJ
Lisa M. Kaiser - Parsippany NJ

Assignee:

Jeneric/Pentron Incorporated - Wallingford CT

International Classification:

C03C 1010

US Classification:

106 35, 501 6, 501 25, 501 27, 501 64, 4332021, 4332171, 4332221, 264112, 264122, 264113, 264 16

Abstract:

A porcelain composition for dental restorations comprising a leucite crystallite phase and a glass matrix phase, wherein the leucite crystallites possess diameters not exceeding about 10 micron. Preferably, the porcelain composition has a maturing temperature from about 750Â to about 1050Â C. and a coefficient of thermal expansion from about 12Ã10 /Â C. to about 17. 5Ã10 /Â C. , and comprises:.

US Patent:

59448849, Aug 31, 1999

Filed:

May 28, 1998

Appl. No.:

9/085873

Inventors:

Carlino Panzera - Belle Mead NJ
Lisa M. Kaiser - Monmouth Junction NJ

Assignee:

Jeneric/Pentron Incorporated - Wallingford CT

International Classification:

C03C 1010

US Classification:

106 35

Abstract:

A porcelain composition for dental restorations comprising a leucite crystallite phase and a glass matrix phase, wherein the leucite crystallites possess diameters not exceeding about 10 micron. Preferably, the porcelain composition has a maturing temperature from about 750. degree. to about 1050. degree. C. and a coefficient of thermal expansion from about 12. times. 10. sup. -6 /. degree. C. to about 17. 5. times. 10. sup. -6 /. degree. C. , and comprises: ______________________________________ Component Amount (wt. %) ______________________________________ SiO. sub. 2 57-66 Al. sub. 2 O. sub. 3 7-15 K. sub. 2 O 7-15 Na. sub. 2 O 7-12 Li. sub. 2 O 0. 5-3. ______________________________________.

US Patent:

60302097, Feb 29, 2000

Filed:

Oct 15, 1998

Appl. No.:

9/173227

Inventors:

Carlino Panzera - Belle Mead NJ
Paul Panzera - Mount Holly NJ
Lisa M. Kaiser - Monmouth Junction NJ
Jana N. Pruden - Belle Mead NJ

Assignee:

Jeneric/Pentron Incorporated - Wallingford CT

International Classification:

A61C 102
A61C 1308

US Classification:

433 26

Abstract:

The present invention relates to a method for preparing the color of a dental restoration using a spectrophotometer and a unique color system for porcelain dental restorations which enables a dentist or technician to manipulate the various color components of the porcelain, hue, chroma, value, and translucency, independently. Color component deltas between consecutive colors in the powder sets are equidistant, with the difference in values being linear in color space. This enables simplified, exact matching of a specified color component value. The method comprises illuminating an abutting tooth with light, gathering reflected light, converting the gathered light to analog signals, correct for ambient light interference, translucency effects (if necessary) and varying illumination, using the result to obtain accurate color component values, and employing those values to chose and, where necessary, mix the appropriate powers to obtain the correct color porcelain for the desired dental restoration.