Dental compositions, fired dental porcelains and processes for making and using same

Patent 4604059 Issued on August 5, 1986. Estimated Expiration Date:

January 4, 2005. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.

Abstract Claims Description Full Text

Patent References

3423829

3488847

Ceramic dental implant
Patent #: 4321042
Issued on: 03/23/1982
Inventor: Scheicher

Dental material
Patent #: 4431451
Issued on: 02/14/1984
Inventor: Mabie , et al.

Single-frit glass ceramic
Patent #: 4455383
Issued on: 06/19/1984
Inventor: Panzera

Method for cosmetic restoration of anterior teeth
Patent #: 4473353
Issued on: 09/25/1984
Inventor: Greggs

Microcellular ceramic material and process for manufacture thereof Patent #: 4475892
Issued on: 10/09/1984
Inventor: Faunce

Inventors

Assignee

Excelco International, Inc.

Application

No. 06/688746 filed on 01/04/1985

US Classes:

433/217.1, By lining or coating106/35, Dental433/199.1, Denture base construction433/201.1, Dental implant construction433/218, Crown433/222.1, Composite433/226, By filling, bonding or cementing433/228.1By named composition

Examiners

Primary: Hayes, Monroe H.

Attorney, Agent or Firm

Lerner, David, Littenberg, Krumholz & Mentlik

International Classes

C04B 41/53 (20060101)
C04B 41/91 (20060101)
C04B 33/00 (20060101)
C04B 33/24 (20060101)
A61K 6/06 (20060101)
A61K 6/02 (20060101)

Abstract

A composition for making a fired dental porcelain is disclosed which composition comprises a powder dental porcelain frit material and a second material. The second material is selectively etchable from a fired dental porcelain prepared from the composition and the second material can, upon such firing of the composition, maintain a separate phase so that, when the composition is formed into a fired dental porcelain having a dental porcelain surface to be bonded to a dental substrate and the dental porcelain surface is etched to remove second material therefrom, the porosity and surface area of the dental porcelain surface will be increased to provide enhanced bonding of the dental porcelain surface to the dental substrate. Also disclosed are fired dental porcelains prepared therefrom and methods of making and using same.