Prosthetic article and method for manufacture

Claim 2

AN ARTICLE COMPRISING A SOLID ALLOY COMPRISING FROM ABOUT 12-20 PERCENT CHROMIUM, FROM ABOUT 7-12 PERCENT COBALT, FROM ABOUT 1.5-5 PERCENT OF AT LEAST ONE ELEMENT SELECTED FROM MOLYBDENUM, TUNGSTEN, COLUMBIUM AND TANTALUM, FROM ABOUT 5-9 PERCENT OF AT LEAST ONE ELEMENT SELECTED FROM ALUMINUM AND TITANIUM, FROM ABOUT 0.05-0-2 PERCENT CARBON, FROM ABOUT 0.005-0.1 PERCENT BORON. FROM ABOUT 0.05-0.2 PERCET OF AT LEAST ONE ELEMENT SELECTED FORM ZIRCONIUM AND HAFNIUM AND THE BALANCE NICKEL WHICH IS SHAPED TO CONFORM WITH THE SHAPE OF BONY TISSUE OF A LIVING ANIMAL AND FOR ATTACHMENT TO SAID BONY TISSUE.

Claim 3

The article of claim 1 wherein said bony tissue is a tooth.

Claim 4

An article comprising a solid alloy comprising from about 12-20 percent chromium, from about 7-12 percent cobalt, from about 1.5-5 percent of at least one element selected from molybdenum, tungsten, columbium and tantalum, from about 5-9 percent of at least one element selected from aluminum and titanium, from about 0.05-0.2 percent carbon, from about 0.005-0.1 percent boron, from about 0.05-0.2 percent of at least one element selected from zirconium and hafnium and the balance nickel, having a fused inorganic oxide bonded to the surface thereof.

Claim 5

An article comprising a solid alloy comprising from about 12-20 percent chromium, from about 7-12 percent cobalt, from about 1.5-5 percent of at least one element selected from molybdenum, tungsten, columbium and tantalum, from about 5-9 percent of at least one element selected from aluminum and titanium, from about 0.05-0.2 percent carbon, from about 0.005-0.1 percent boron, from about 0.05-0.2 percent of at least one element selected from zirconium and hafnium and the balance nickel, having a fused inorganic oxide bonded to the surface thereof.

Claim 6

The article of claim 3 wherein said alloy consists essentially of 15-18 percent chromium, 8-11 percent cobalt, 0.75-2.2 percent molybdenum, 1.8-3 percent tungsten, 0.5-2 percent columbium, 1-3 percent tantalum, 3-4 percent aluminum, 0.1-0.2 percent carbon, 3-4 percent titanium with a total content of aluminum and titanium not exceeding 7.5 percent, 0.01-0.05 percent boron, 0.01-0.2 percent zirconium and the balance essentially nickel.

Claim 7

The article of claim 3 wherein said fused inorganic oxide is dental porcelain.

Claim 8

The article of claim 3 wherein said fused inorganic oxide is ceramic bisque.

Claim 9

The article of claim 3 shaped to conform with the shape of bony tissue of a living animal for attachment to said bony tissue.

Claim 10

The article of claim 7 wherein said bony tissue is a tooth.

Claim 11

A process for producing a prosthetic device comprising: A. Forming a shaped article of an alloy comprising from about 12-20 percent chromium, from about 7-12 percent cobalt, from about 1.5-5 percent of at least one element selected from molybdenum, tungsten, columbium and tantalum, from about 5-9 percent of at least one element selected from aluminum and titanium, from about 0.05-0.2 percent carbon, from about 0.0050.1 percent boron, from about 0.05-0.2 percent of at least one element selected from zirconium and hafnium and the balance nickel, said article being shaped for attachment to bony tissue of a living animal; B. Covering at least a portion of the surface of said shaped article with inorganic oxide capable of forming a fused inorganic oxide coating at elevated temperature; and C. Heating said shaped article covered with inorganic oxide to a temperature at which a fused inorganic oxide coating is formed.

Claim 12

A process for producing a prosthetic device comprising: A. Forming a shaped article of an alloy comprising from about 12-20 percent chromium, from about 7-12 percent cobalt, from about 1.5-5 percent of at least one element selected from molybdenum, tungsten, columbium and tantalum, from about 5-9 percent of at least one element selected from aluminum and titanium, from about 0.05-0.2 percent carbon, from about 0.0050.1 percent boron, from about 0.05-0.2 percent of at least one element selected from zirconium and hafnium and the balance nickel, said article being shaped for attachment to bony tissue of a living animal; B. Covering at least a portion of the surface of said shaped article with inorganic oxide capable of forming a fused inorganic oxide coating at elevated temperature; and C. Heating said shaped article covered with inorganic oxide to a temperature at which a fused inorganic oxide coating is formed.

Claim 13

The process of claim 9 wherein said alloy consists essentially of 15-18 percent chromium, 8-11 percent cobalt, 0.75-2.2 percent molybdenum, 1.8-3 percent tungsten, 0.5-2 percent columbium, 1-3 percent tantalum, 3-4 percent aluminum, 0.1-0.2 percent carbon, 3-4 percent titanium with a total content of aluminum and titanium not exceeding 7.5 percent, 0.01-0.05 percent boron, 0.01-0.2 percent zirconium and the balance essentially nickel.

Claim 14

The process of claim 9 wherein said shaped article is formed by casting.

Claim 15

The process of claim 9 wherein said prosthetic device is for use in an oral cavity.

Claim 16

A physiologically compatible prosthetic alloy consisting essentially of from about 12-20 percent chromium, from about 7-12 percent cobalt, from about 1.5-5 percent of at least one element selected from molybdenum, tungsten, columbium and tantalum, from about 5-9 percent of at least one element selected from aluminum and titanium, from about 0.05-0.2 percent carbon, from about 0.005-0.1 percent boron, from about 0.05-0.2 percent of at least one element selected from zirconium and hafnium and the balance nickel.

Claim 17

A physiologically compatible prosthetic alloy consisting essentially of from about 12-20 percent chromium, from about 7-12 percent cobalt, from about 1.5-5 percent of at least one element selected from molybdenum, tungsten, columbium and tantalum, from about 5-9 percent of at least one element selected from aluminum and titanium, from about 0.05-0.2 percent carbon, from about 0.005-0.1 percent boron, from about 0.05-0.2 percent of at least one element selected from zirconium and hafnium and the balance nickel.