US2460595A - Dental metal alloys - Google Patents
Dental metal alloys Download PDFInfo
- Publication number
- US2460595A US2460595A US595877A US59587745A US2460595A US 2460595 A US2460595 A US 2460595A US 595877 A US595877 A US 595877A US 59587745 A US59587745 A US 59587745A US 2460595 A US2460595 A US 2460595A
- Authority
- US
- United States
- Prior art keywords
- alloy
- metal alloys
- waste
- dental metal
- dental
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
- 229910001092 metal group alloy Inorganic materials 0.000 title description 2
- 229910045601 alloy Inorganic materials 0.000 description 16
- 239000000956 alloy Substances 0.000 description 16
- 239000002699 waste material Substances 0.000 description 7
- 238000002844 melting Methods 0.000 description 5
- 230000008018 melting Effects 0.000 description 5
- 239000000203 mixture Substances 0.000 description 4
- KDLHZDBZIXYQEI-UHFFFAOYSA-N Palladium Chemical compound [Pd] KDLHZDBZIXYQEI-UHFFFAOYSA-N 0.000 description 3
- 239000010931 gold Substances 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 229910052737 gold Inorganic materials 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 239000010814 metallic waste Substances 0.000 description 2
- 229910052759 nickel Inorganic materials 0.000 description 2
- 239000010938 white gold Substances 0.000 description 2
- 229910000832 white gold Inorganic materials 0.000 description 2
- 229910052725 zinc Inorganic materials 0.000 description 2
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 description 1
- 238000003723 Smelting Methods 0.000 description 1
- 241001062472 Stokellia anisodon Species 0.000 description 1
- 229910052797 bismuth Inorganic materials 0.000 description 1
- 229910052793 cadmium Inorganic materials 0.000 description 1
- 238000005266 casting Methods 0.000 description 1
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 229910052763 palladium Inorganic materials 0.000 description 1
- 238000007670 refining Methods 0.000 description 1
- 229910052709 silver Inorganic materials 0.000 description 1
- 239000004332 silver Substances 0.000 description 1
- 229910052718 tin Inorganic materials 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C30/00—Alloys containing less than 50% by weight of each constituent
- C22C30/02—Alloys containing less than 50% by weight of each constituent containing copper
Definitions
- the sheet material consists as a rule of palladium, gold and silver in proportions of about 25-39%, -10% and 60-70% respectively and has a rather high melting point of about 1206-1300 C.
- Such an alloy can be sin lted by means of a hydrogen-oxygen flame only, which is not always available.
- composition of the new alloy which I have found most suitable is:
- the M. P. of the new alloy is about 1000 C.
- the proportion of mixture is from two to one of the waste to one part of the alloy
- the M. P. of the ultimate alloy is 1000-1100 C.
- the new alloys can be prepared in different Inupholstered June 26, 19%
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Dental Preparations (AREA)
Description
Patented Feb. 1, 1949 nm'ro l Claim.
There are two kinds of metal alloys for dental purposes, those rolled into sheet material and used e. g. for making crowns, and those cast for making bridges or inlays. This invention is concerned with the utilisation of the waste obtained from the sheet material. The sheet material consists as a rule of palladium, gold and silver in proportions of about 25-39%, -10% and 60-70% respectively and has a rather high melting point of about 1206-1300 C. Such an alloy can be sin lted by means of a hydrogen-oxygen flame only, which is not always available.
As is known, there occurs in dental technics a considerable amount or" waste of the said rolled alloy, which the dentists, however, are unable to smelt and use again with the burners at their disposal, and thus are forced to deliver them to metal refineries.
This diificulty is alleviated by the present invention, according to which a new alloy has been prepared which itself is smeltable at about 1000 C., in which, when molten, the said waste material added in the proportion from two to one .to one part of the new alloy easily dissolves and which together give an ultimate alloy which is suitable for dental castings, as e. g. used for clasps, bridges and hard inlays, and has a M. P. of 1000-1100 C. p
The composition of the new alloy which I have found most suitable is:
Metal Au Pt Ni Zn Ag Pd Cu Parts by weight 1 V 1 1 1 1o 13 21 with white gold sheet waste is:
Metal Au Pt Zn Ag Pd Cu Ni Parts by Weight 30 1 1 3 4 1 Here too the M. P. of the new alloy is about 1000 C., the proportion of mixture is from two to one of the waste to one part of the alloy, and the M. P. of the ultimate alloy is 1000-1100 C.
The new alloys can be prepared in different In Palestine June 26, 19%
(Cl. YE-=- 3i) ways. One may begin with heating a component element of a high melting point and then add in the course of the smelting process elements of lower melting points at the same time lowering the temperature. Or conversely, one can start with heating an element with a low melting point and then add elements of high melting points, at the same time increasing the temperature. The new alloys can be produced on an industrial scale and sold to dentists. Instead of ZN may be added to the alloy in the same proportion Cd, Sn or Bi.
The following examples will illustrate the use of the new alloys:
10 grams of ordinary dental sheet metal waste not meltable at a temperature of 10001100 is added to a molten alloy being 10 grams of the composition Parts Pt, Au, Ni, Zn, each 1 Ag 10 Pd 13 Cu 21 The ten grams of waste easily dissolve in the molten alloy at the above temperature.
10 grams of white gold sheet waste not meltable at a temperature of 1000-1100 C. are added to a molten alloy being 10 grams of the composition.
Parts Pt, Zn, Ni, each 1 Au 30 Ag 3 Pa 4 Cu 10 REFERENCES CITED The following references are of record in the file of this patent:
FOREIGN PATENTS 7 Country Date Switzerland May 16, 1942 OTHER REFERENCES Refining Precious Metal Wastes, by Hoke, 1940, pages 133 and 134.
Number
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| IL2460595X | 1944-06-26 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| US2460595A true US2460595A (en) | 1949-02-01 |
Family
ID=11075964
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| US595877A Expired - Lifetime US2460595A (en) | 1944-06-26 | 1945-05-25 | Dental metal alloys |
Country Status (1)
| Country | Link |
|---|---|
| US (1) | US2460595A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3907555A (en) * | 1972-12-22 | 1975-09-23 | Howmedica | Nickel alloys |
| US4012228A (en) * | 1976-05-14 | 1977-03-15 | Howmedica, Inc. | Low intrinsic value alloys |
| US4396578A (en) * | 1982-01-27 | 1983-08-02 | Bales Randy L | White gold jewelry alloy |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CH219452A (en) * | 1939-08-25 | 1942-02-15 | Degussa | High strength dental alloy. |
-
1945
- 1945-05-25 US US595877A patent/US2460595A/en not_active Expired - Lifetime
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CH219452A (en) * | 1939-08-25 | 1942-02-15 | Degussa | High strength dental alloy. |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3907555A (en) * | 1972-12-22 | 1975-09-23 | Howmedica | Nickel alloys |
| US4012228A (en) * | 1976-05-14 | 1977-03-15 | Howmedica, Inc. | Low intrinsic value alloys |
| US4396578A (en) * | 1982-01-27 | 1983-08-02 | Bales Randy L | White gold jewelry alloy |
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