GB1476100A - Dental amalgams - Google Patents

Dental amalgams

Info

Publication number
GB1476100A
GB1476100A GB1123875A GB1123875A GB1476100A GB 1476100 A GB1476100 A GB 1476100A GB 1123875 A GB1123875 A GB 1123875A GB 1123875 A GB1123875 A GB 1123875A GB 1476100 A GB1476100 A GB 1476100A
Authority
GB
United Kingdom
Prior art keywords
powder
particle
mercury
amalgam
march
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
Application number
GB1123875A
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Federal Mogul LLC
Original Assignee
Federal Mogul LLC
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Federal Mogul LLC filed Critical Federal Mogul LLC
Publication of GB1476100A publication Critical patent/GB1476100A/en
Expired legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C1/00—Making non-ferrous alloys
    • C22C1/04—Making non-ferrous alloys by powder metallurgy
    • C22C1/0466—Alloys based on noble metals
    • 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
    • A61K6/847—Amalgams
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C7/00—Alloys based on mercury
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S75/00—Specialized metallurgical processes, compositions for use therein, consolidated metal powder compositions, and loose metal particulate mixtures
    • Y10S75/955—Producing dental product

Landscapes

  • Chemical & Material Sciences (AREA)
  • Health & Medical Sciences (AREA)
  • Oral & Maxillofacial Surgery (AREA)
  • Organic Chemistry (AREA)
  • Metallurgy (AREA)
  • Mechanical Engineering (AREA)
  • Materials Engineering (AREA)
  • Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Veterinary Medicine (AREA)
  • Public Health (AREA)
  • General Health & Medical Sciences (AREA)
  • Animal Behavior & Ethology (AREA)
  • Epidemiology (AREA)
  • Plastic & Reconstructive Surgery (AREA)
  • Dental Preparations (AREA)
  • Powder Metallurgy (AREA)

Abstract

1476100 Dental Amalgam FEDERALMOGUL CORP 18 March 1975 [18 March 1974] 11238/75 Heading C7A A silver alloy powder comprising Ag 47À4%-69À8%, balance Sn 20-31À9% Cu 7À6-26À3 with optionally up to 2% Zn and with ratios, Ag to Sn = 1.8 to 3:1 and Sn to Cu = 1 to 3:1 is mixed with 42-54% mercury to produce a corrosion and discoluration resistant, dental amalgam with improved mechancial properties The powder is made by micro casting a homogenous alloy into small particles, average size less than in 100 microns (preferably 5-44 microns) by airless spraying or centrifugal fragmentation or preferably by atomizing and cooling preferably with and in an inert gas i.e. argon, so that, while each particle is of the same composition, there is a compositional gradient from edge to centre of the spherical particles, the outer surface being richer in Ag and Cu, with the tin-rich phase concentrated at the particle core. When triturated with mercury, the powder forms a continuous matrix with discrete unreacted particle cores, thus providing an amalgam with unproved properties.
GB1123875A 1974-03-18 1975-03-18 Dental amalgams Expired GB1476100A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US451840A US3871876A (en) 1974-03-18 1974-03-18 Dental Amalgam

Publications (1)

Publication Number Publication Date
GB1476100A true GB1476100A (en) 1977-06-10

Family

ID=23793912

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1123875A Expired GB1476100A (en) 1974-03-18 1975-03-18 Dental amalgams

Country Status (10)

Country Link
US (1) US3871876A (en)
JP (1) JPS5435860B2 (en)
BR (1) BR7501521A (en)
CA (1) CA1039538A (en)
DE (1) DE2505934C3 (en)
FR (1) FR2264521B1 (en)
GB (1) GB1476100A (en)
IT (1) IT1028449B (en)
NL (1) NL167318C (en)
SE (1) SE425049B (en)

Families Citing this family (27)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2511194C3 (en) * 1975-03-14 1979-03-15 Deutsche Gold- Und Silber-Scheideanstalt Vormals Roessler, 6000 Frankfurt Alloy powder mixture for the production of dental amalgams
US3975192A (en) * 1975-03-28 1976-08-17 Sybron Corporation Dental alloy and amalgam
US3985558A (en) * 1975-03-28 1976-10-12 Sybron Corporation Dental alloy and amalgam
US3954457A (en) * 1975-04-28 1976-05-04 Gary Maurice Weikel Dental amalgam
US4164419A (en) * 1975-12-22 1979-08-14 Shofu Dental Manufacturing Company, Limited Powdered alloy for dental amalgam
US3997327A (en) * 1975-12-29 1976-12-14 Engelhard Minerals & Chemicals Corporation Dental composition
US3997330A (en) * 1975-12-29 1976-12-14 Engelhard Minerals & Chemicals Corporation Dental amalgams
US3997329A (en) * 1975-12-29 1976-12-14 Engelhard Minerals & Chemicals Corporation Dental composition
US3997328A (en) * 1975-12-29 1976-12-14 Engelhard Minerals & Chemicals Corporation Dental amalgams
US4080199A (en) * 1976-05-27 1978-03-21 Johnson & Johnson Lathe cut dental alloy powder
US4030918A (en) * 1976-05-27 1977-06-21 Johnson & Johnson Indium containing dental alloy powder
GB1594643A (en) * 1977-01-17 1981-08-05 Engelhard Min & Chem Corrosion-resistant dental alloy having improved handling characteristics
US4235631A (en) * 1978-08-24 1980-11-25 Engelhard Minerals & Chemicals Corporation Corrosion-resistant dental alloy having improved handling characteristics
US4234339A (en) * 1978-08-24 1980-11-18 Engelhard Minerals & Chemicals Corporation Corrosion-resistant dental alloy
US4226622A (en) * 1978-08-24 1980-10-07 Engelhard Minerals & Chemicals Corporation Corrosion-resistant dental alloy
AR223024A1 (en) * 1980-01-31 1981-07-15 Macrodent Sa A PRODUCT TO BE USED IN COMPRESSED DENTAL AMALGAMAS OR DISINTEGRABLE PILLS OBTAINED BY AGGLOMERATION OF SUCH PRODUCT AND AMALGAMAS OBTAINED FROM THIS LAST
JPH0214202Y2 (en) * 1980-02-20 1990-04-18
US4374085A (en) * 1980-05-29 1983-02-15 Special Metals Corporation Silver-tin-copper-palladium alloy and amalgam thereof
DE3240256C1 (en) * 1982-10-30 1983-09-29 Blendax-Werke R. Schneider Gmbh & Co, 6500 Mainz Process for the production of silver-tin master alloys for dental amalgams
US4664629A (en) * 1983-06-27 1987-05-12 Dentsply Research & Development Corp. Dental composition mixture
US4664855A (en) * 1985-11-12 1987-05-12 Special Metals Corporation Method for producing amalgamable alloy
US5091114A (en) * 1988-08-23 1992-02-25 Asahi Kasei Kogyo Kabushiki Kaisha Conductive metal powders, process for preparation thereof and use thereof
JPH10501025A (en) * 1993-10-08 1998-01-27 アメリカ合衆国 Acid assisted cold welding and intermetallic formation and its dental applications
US5490870A (en) * 1993-10-28 1996-02-13 Special Metals Corporation Amalgamable composition and method of production
US5354353A (en) * 1993-10-28 1994-10-11 Special Metals Corporation Amalgamable composition and method of production
FR2772265B1 (en) * 1997-12-12 2001-09-07 Schiller Henri REDUCED MERCURY RATE DENTAL AMALGAM AND PROCESS FOR PRODUCING SUCH AN AMALGAM
US6458180B1 (en) * 2001-01-10 2002-10-01 Jiin-Huey Chern Lin Amalgamatable dental alloy powder having an effect of reducing initial mercury vapor release rate

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1612782A (en) * 1923-12-19 1926-12-28 Lee S Smith & Son Mfg Company Dental alloy and process of making the same
US1963085A (en) * 1933-08-05 1934-06-19 Arthur W Gray Comminuted alloy
US2281991A (en) * 1938-04-27 1942-05-05 Poetschke Paul Dental amalgam alloy
US3305356A (en) * 1963-08-30 1967-02-21 William V Youdelis Dental amalgam
US3554738A (en) * 1968-05-21 1971-01-12 Victor E Beldham Dental amalgam
US3676112A (en) * 1970-05-19 1972-07-11 Indiana University Foundation Anticariogenic dental amalgam

Also Published As

Publication number Publication date
JPS5435860B2 (en) 1979-11-06
DE2505934A1 (en) 1975-09-25
SE7502497L (en) 1975-09-19
DE2505934C3 (en) 1979-01-04
NL167318B (en) 1981-07-16
NL167318C (en) 1981-12-16
CA1039538A (en) 1978-10-03
BR7501521A (en) 1975-12-23
IT1028449B (en) 1979-01-30
JPS50125922A (en) 1975-10-03
FR2264521B1 (en) 1978-12-29
NL7502941A (en) 1975-09-22
AU7715375A (en) 1976-07-08
SE425049B (en) 1982-08-30
FR2264521A1 (en) 1975-10-17
DE2505934B2 (en) 1978-05-11
US3871876A (en) 1975-03-18

Similar Documents

Publication Publication Date Title
GB1476100A (en) Dental amalgams
EP0173806B1 (en) Gallium alloy for dental restorations
GB1206379A (en) Metal alloy powders
US5082622A (en) Zinc alloy powder for alkaline batteries
US4548642A (en) Process for preparing zinc powder for alkaline batteries (V)
US3980472A (en) Dental amalgam
GB1426516A (en) Dispersion-strengthened alloys
US4859412A (en) Method of producing alloyed powders for dental amalgams
GB1145799A (en) Beryllium-silver copper composite
US4920020A (en) Zinc powder for alkaline batteries
GB1521632A (en) Dental powder composite and amalgam
JPH0353371B2 (en)
EP0033628A3 (en) A product to be used in dental amalgams
GB1517309A (en) Alloy powders for the preparation of dental amalgams
US4453977A (en) Low silver containing dental amalgam alloys
GB1350482A (en) Method of preparing metal alloy composite powders
GB2121823A (en) Selenium-containing amalgam alloys for dental restoration and method for the preparation thereof
Parker Dental Amalgam Alloy
JPS62240729A (en) Purple sintered gold alloy for ornamentation
JPS6167744A (en) Dental kneading and restoring metallic material
JPS57110601A (en) Zinc alloy powder for mechanical plating
GB1127407A (en) Coated ferrous products and the production thereof
JP2985358B2 (en) Manufacturing method of alloy gold clay
JPS5576033A (en) Manufacture of dispersion strengthening type alloy
CA2134289A1 (en) Amalgamable Composition and Method of Production

Legal Events

Date Code Title Description
PS Patent sealed [section 19, patents act 1949]
732 Registration of transactions, instruments or events in the register (sect. 32/1977)
PE20 Patent expired after termination of 20 years

Effective date: 19950317