Howmedica Corp.

Ronald P Dudek

Peter Kosmos

John A Tesk

Henrietta M Severa

A nonprecious alloy for dental restorations fused to porcelain includes the following ranges of constituents in percentages by weight:

Nonprecious alloy for fusion to porcelain

A gold-colored alloy solder for use with dental gold alloys and gold-colored jewelry alloys includes the following ranges of constituents in percentages by weight:

Gold-colored alloy solders

A low intrinsic value alloy for dental and jewelry use includes the following ranges of constituents in percentages by weight:

Low intrinsic value alloys

An extremely effective agent for achieving optimum bonding between a nonprecious dental alloy and porcelain is painted onto the alloy in slurry form and fired to prepare the surface of the alloy for bonding to porcelain. The bonding agent includes major proportions of fine gold powder, porcelain, liquid flux and a minor amount of fine zirconium oxide. The liquid flux is a low fusing flux dissolved in a liquid vehicle, such as glycerine or an alcohol. Suitable fluxes are boron oxide and its salts. The flux reacts to the porcelain and with the oxides which are formed on the alloy during firing to produce a low solubility, highly tenacious, adherent intermediate layer of oxides to which porcelain will readily and firmly adhere during subsequent application and firing.

Bonding agent for fusing porcelain to nonprecious metal alloy

A nonprecious alloy for fixed dental restorations such as for porcelain fused to metal, plastic veneered crown and bridge, nonveneered crown and bridge, inlays, etc. includes the following ranges of constituents in percentages by weight:

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River Grove, IL, United States of America

Ronald P Dudek