GB2048939A - Dental Gold Composition - Google Patents

Dental Gold Composition Download PDF

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Publication number
GB2048939A
GB2048939A GB7918772A GB7918772A GB2048939A GB 2048939 A GB2048939 A GB 2048939A GB 7918772 A GB7918772 A GB 7918772A GB 7918772 A GB7918772 A GB 7918772A GB 2048939 A GB2048939 A GB 2048939A
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GB
United Kingdom
Prior art keywords
gold
dental
alloy
ruthenium
palladium
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.)
Withdrawn
Application number
GB7918772A
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.)
ARGEN Ltd
Original Assignee
ARGEN Ltd
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 ARGEN Ltd filed Critical ARGEN Ltd
Publication of GB2048939A publication Critical patent/GB2048939A/en
Withdrawn legal-status Critical Current

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Classifications

    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C5/00—Alloys based on noble metals
    • C22C5/02—Alloys based on gold
    • 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
    • A61K6/844—Noble metals
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C5/00—Alloys based on noble metals
    • C22C5/04—Alloys based on a platinum group metal

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

Abstract

A dental gold alloy comprises (by weight) 35 to 55% gold, 5 to 10% indium, 0.1 to 0.5% ruthenium, 0 to 1% gallium, the remainder being palladium.

Description

SPECIFICATION Dental Gold Composition This invention relates to a dental gold composition. In particular, the invention relates to a lightweight porcelain-bonding dental alloy.
According to the invention a dental gold composition comprises by weight of 35 to 55% gold, 5 to 10% indium, 0.1 to 0.5% ruthenium, between 0 to 1% gallium and the rest being palladium.
One embodiment of the invention is given, by way of example, in the following table: Example Composition Physical Properties Gold51.4% Hardness: 235 DPN Indium9.4% Ultimate Tensile Strength: 59 kgm/mm2 Ruthenium--0.1% Yield strength: 50 kgm/mm2 Gallium0.6% Elongation: 20% Palladium-38.5% Density: 14.0 gm/cc The alloy described in the above example has a high strength and is suitable for long span bridgework. It is readily cast into multiple unit bridges. There is no discolouration of porcelain and virtually no distortion during firing procedures. The alloy is also compatible with all commonly used porcelain powders.
Claims
1. A dental gold alloy comprising by weight of 35 to 55% gold, 5 to 10% indium, 0.1 to 0.5% ruthenium, between 0 to 1% gallium and the rest being palladium.
2. A dental gold alloy according to claim 1 comprising by weight of 51.4% gold, 9.4% indium, 0. 1% ruthenium, 0.6% gallium and 38.5% palladium.
3. Any novel feature or novel combination of features disclosed herein.
**WARNING** end of DESC field may overlap start of CLMS **.

Claims (3)

**WARNING** start of CLMS field may overlap end of DESC **. SPECIFICATION Dental Gold Composition This invention relates to a dental gold composition. In particular, the invention relates to a lightweight porcelain-bonding dental alloy. According to the invention a dental gold composition comprises by weight of 35 to 55% gold, 5 to 10% indium, 0.1 to 0.5% ruthenium, between 0 to 1% gallium and the rest being palladium. One embodiment of the invention is given, by way of example, in the following table: Example Composition Physical Properties Gold51.4% Hardness: 235 DPN Indium9.4% Ultimate Tensile Strength: 59 kgm/mm2 Ruthenium--0.1% Yield strength: 50 kgm/mm2 Gallium0.6% Elongation: 20% Palladium-38.5% Density: 14.0 gm/cc The alloy described in the above example has a high strength and is suitable for long span bridgework. It is readily cast into multiple unit bridges. There is no discolouration of porcelain and virtually no distortion during firing procedures. The alloy is also compatible with all commonly used porcelain powders. Claims
1. A dental gold alloy comprising by weight of 35 to 55% gold, 5 to 10% indium, 0.1 to 0.5% ruthenium, between 0 to 1% gallium and the rest being palladium.
2. A dental gold alloy according to claim 1 comprising by weight of 51.4% gold, 9.4% indium, 0. 1% ruthenium, 0.6% gallium and 38.5% palladium.
3. Any novel feature or novel combination of features disclosed herein.
GB7918772A 1979-05-17 1979-05-30 Dental Gold Composition Withdrawn GB2048939A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
ZA792416 1979-05-17

Publications (1)

Publication Number Publication Date
GB2048939A true GB2048939A (en) 1980-12-17

Family

ID=25574076

Family Applications (1)

Application Number Title Priority Date Filing Date
GB7918772A Withdrawn GB2048939A (en) 1979-05-17 1979-05-30 Dental Gold Composition

Country Status (2)

Country Link
FR (1) FR2456514A1 (en)
GB (1) GB2048939A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4539176A (en) * 1984-05-04 1985-09-03 Pennwalt Corporation Low gold dental alloys
EP0154123A2 (en) * 1984-02-24 1985-09-11 Degussa Aktiengesellschaft Noble metal alloys for dental use
US5051235A (en) * 1987-06-26 1991-09-24 Comptoir Lyon-Alemand-Louyot, Societe Anonyme Novel palladium-based alloys containing indium bismuth, silver and copper

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0154123A2 (en) * 1984-02-24 1985-09-11 Degussa Aktiengesellschaft Noble metal alloys for dental use
US4591483A (en) * 1984-02-24 1986-05-27 Degussa Aktiengesellschaft Noble metal alloys for dental uses
EP0154123A3 (en) * 1984-02-24 1987-05-06 Degussa Aktiengesellschaft Noble metal alloys for dental use
US4539176A (en) * 1984-05-04 1985-09-03 Pennwalt Corporation Low gold dental alloys
US5051235A (en) * 1987-06-26 1991-09-24 Comptoir Lyon-Alemand-Louyot, Societe Anonyme Novel palladium-based alloys containing indium bismuth, silver and copper

Also Published As

Publication number Publication date
FR2456514A1 (en) 1980-12-12

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Legal Events

Date Code Title Description
WAP Application withdrawn, taken to be withdrawn or refused ** after publication under section 16(1)