Pd-Ag-Ga DENTAL ALLOYS WITH INTERNAL OXIDATION CHARACTERISTICS

a dental alloy and internal oxidation technology, applied in the field of palladiumsilvergallium dental alloys with internal oxidation characteristics, can solve the problems of difficult masking, all of these conventional alloys, and the tendency to develop dark oxides during porcelain firing
US20100266443A1Inactive Publication Date: 2010-10-21ARGEN
2 Cites 1 Cited by

Patent Information

Authority / Receiving Office
US · United States
Current Assignee / Owner
ARGEN
Publication Date
2010-10-21
Estimated Expiration
Not applicable · inactive patent

Smart Images

  • Figure 1
    Figure 1
  • Figure 2
    Figure 2
Patent Text Reader

Abstract

A Pd—Ag alloy system that utilizes internal oxidation by including a base metal addition of only Ga is provided. The Pd—Ag—Ga alloy is particularly well-suited for use in porcelain-fused-to-metal (PFM) applications because the alloy does not form a dark oxide upon heating. The high oxygen potential of the material ensures the development of a tenacious chemical bond with the porcelain when used in PFM applications. Moreover, the addition of gallium lowers the liquidus temperature of the alloy to improve castability and strengthens the alloy significantly.
Need to check novelty before this filing date? Find Prior Art

Description

FIELD OF THE INVENTION

[0001] This invention relates generally to improved palladium-silver alloys; and more particularly to a palladium-silver-gallium dental alloy with internal oxidation characteristics.BACKGROUND OF THE INVENTION

[0002] Compositional analyses of palladium-silver dental alloys intended for porcelain-fused-to-metal (PFM) applications reveal that all commercial alloys currently available utilize various combinations of base metals, such as, In, Sn, Ga, Zn and Mn to create materials which are easily cast, have high mechanical strengths, have suitable coefficients of thermal expansion (CTE) and can create a proper bond with porcelains. However, all of these conventional alloys suffer from a serious limitation, namely, that they tend to develop dark oxides during porcelain firing. These dark oxides are difficult to mask and can negatively effect the overall esthetics of the porcelain, particularly in the thin sections of the porcelain.

[0003] One method of addressing this ae...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More