US1935266A - Metallic dental filling composition - Google Patents
Metallic dental filling composition Download PDFInfo
- Publication number
- US1935266A US1935266A US328056A US32805628A US1935266A US 1935266 A US1935266 A US 1935266A US 328056 A US328056 A US 328056A US 32805628 A US32805628 A US 32805628A US 1935266 A US1935266 A US 1935266A
- Authority
- US
- United States
- Prior art keywords
- dental filling
- filling composition
- metallic dental
- chromium
- alloy
- 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
Classifications
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
- A61K6/00—Preparations for dentistry
- A61K6/80—Preparations for artificial teeth, for filling teeth or for capping teeth
- A61K6/84—Preparations for artificial teeth, for filling teeth or for capping teeth comprising metals or alloys
Definitions
- This invention relates to a plastic composition to be used for filling carious teeth.
- the object of the invention is to provide a composition of this kind which can be polished well,
- This object is obtained according to the invention by making a mixture of a chemically neutral chromium-nickel iron or steel alloy in powdered condition and a dental cement, the proportions being preferably determined so that there is just sufficient of the metallic alloy to insure the desired high resistance to wear and good polishability.
- the manner in which the alloys are brought into the powdered condition is of no importance for the present invention. They may be pulverized by means. of mills such as those described in the patents to C. T. Fuller, No. 1,041,769 and E. Podszus, No. 1,573,017.
- a still better procedure, based upon certain particular properties of the chemically neutral chromium-nickel iron and steel alloys, is as follows: A piece of chemically neutral chromium-nickel iron or steel alloy is heated for a considerable time to a temperature between 500 to 900 'C., after which it is subjected to the attack of a suitable corrosive, such as dilute sulphuric acid containing copper sulphate. The heating causes the separation from the austenitic matrix of the alloy of carbides, which are. segregated in the grain boundaries,
- a dental filling mass consisting of a mixture of about 50% of dental cement and about 50% of a powdered chromium-nickel iron or steel alloy neutral to chemical agents.
Description
Patented Nov. 14, 1933 UNITED STATES METALLIC DENTAL FILLING COMPOSITION Friedrich Hauptmeyer, Essen, Germany N Drawing.
Application December 22, 1928,
Serial No. 328,056, and in Germany March 1,
1 Claim. (Cl. 106-6) This invention relates to a plastic composition to be used for filling carious teeth. The object of the invention is to provide a composition of this kind which can be polished well,
5 which possesses high resistance to wear, and
which is neutral to chemical agents. This object is obtained according to the invention by making a mixture of a chemically neutral chromium-nickel iron or steel alloy in powdered condition and a dental cement, the proportions being preferably determined so that there is just sufficient of the metallic alloy to insure the desired high resistance to wear and good polishability.
Any of the known chemically neutral chromium-nickel iron alloys, or chromium-nickel steel alloys may be used, and they may contain other components not jeopardizing the advantageous property of chemical neutrality. As ex- 20 amples of the alloys which may be used, reference is made to the patents to Benno Strauss, No. 1,339,378,
1,421,776, and Harry Etchels, No. 1,522,813.
The dental filling composition may be pro- 5 duced, for example, in the following manner.
Finely powdered chemically neutral chromiumnickel steel containing about percent of chromium and 7 percent of nickel is mixed with one of the cements used in dental surgery, with addition of the usual setting liquid, and a paste which is at first plastic, but which concretes later on is made thereof. The lower limit of the percentage of chromium-nickel steel is determined by tests showing whether the mixture Friedrich I-Iauptmeyer, No.
After the cement has set, the plug is polished and then forms a tooth filling which is both chemically neutral toward all agents that come into consideration, and highly resistant to wear, and is far superior to amalgam filling which under certain circumstances is not harmless.
The manner in which the alloys are brought into the powdered condition is of no importance for the present invention. They may be pulverized by means. of mills such as those described in the patents to C. T. Fuller, No. 1,041,769 and E. Podszus, No. 1,573,017. A still better procedure, based upon certain particular properties of the chemically neutral chromium-nickel iron and steel alloys, is as follows: A piece of chemically neutral chromium-nickel iron or steel alloy is heated for a considerable time to a temperature between 500 to 900 'C., after which it is subjected to the attack of a suitable corrosive, such as dilute sulphuric acid containing copper sulphate. The heating causes the separation from the austenitic matrix of the alloy of carbides, which are. segregated in the grain boundaries,
from which they are substantially washed out by the action of the corrosive agent. Under the influence of this inter-crystallinecorrosion the alloy first loses its metallic ring, .then becomes like leather, so that it can be bent and crumbled in the fingers. In this condition the alloy can I easily be reduced to, an extremely fine powder and this is advantageous because the polishability of the composition depends upon the fineness of the metal particles. 1 I claim:
A dental filling mass consisting of a mixture of about 50% of dental cement and about 50% of a powdered chromium-nickel iron or steel alloy neutral to chemical agents.
FRIEDRICH HAUP'IMEYER.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE307011X | 1928-03-01 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| US1935266A true US1935266A (en) | 1933-11-14 |
Family
ID=6121298
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| US328056A Expired - Lifetime US1935266A (en) | 1928-03-01 | 1928-12-22 | Metallic dental filling composition |
Country Status (2)
| Country | Link |
|---|---|
| US (1) | US1935266A (en) |
| GB (1) | GB307011A (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE4000566A1 (en) * | 1990-01-10 | 1991-07-11 | Wolfgang Albrecht | Filling for teeth - contg. metal granulate of varying grain size and bonding layer coated onto grains |
-
1928
- 1928-12-22 US US328056A patent/US1935266A/en not_active Expired - Lifetime
-
1929
- 1929-01-05 GB GB469/29A patent/GB307011A/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| GB307011A (en) | 1930-04-07 |
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