US1803386A - Process for producing amalgams to be used in dentistry - Google Patents

Process for producing amalgams to be used in dentistry Download PDF

Info

Publication number
US1803386A
US1803386A US243203A US24320327A US1803386A US 1803386 A US1803386 A US 1803386A US 243203 A US243203 A US 243203A US 24320327 A US24320327 A US 24320327A US 1803386 A US1803386 A US 1803386A
Authority
US
United States
Prior art keywords
powder
amalgams
dentistry
producing
mercury
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
Application number
US243203A
Inventor
Fischer Erik Wilhelm
Virgin Erik Wilhelm J Son
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Application granted granted Critical
Publication of US1803386A publication Critical patent/US1803386A/en
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • C22C7/00—Alloys based on mercury

Definitions

  • This invention relates to an improved process for producing amalgams to be used in dentistry and more particularly to a specially prepared powder to be used in said process.
  • Tooth cement has hitherto been prepared by mixing a metal powder, for instance tin,
  • This invention relates to the manufacture of a metal or alloy powder to be used for the production of amalgams for dentistry by means of which said disadvantages are avoided or substantially lessened.
  • the improved results are obtained by providing the powder particles, in advance of use, with a thin superficial skin of mercury on their surface. This results in the V amalgamation being considerably facilitated and accelerated so that the use of such a prepared powder reduces the time required in mixing and kneading a quantity of powder in preparing fillings.
  • the amalgamation will also be complete, or more nearly so, whereby when the amalgam is filled into the cavities no changes in volume of the plugs occur.
  • the treatment of the metal or alloy powder with mercury may suitably be carried out in the wet state and preferably in such a way that the powder is treated with finely divided mercury and a weakly c'orroding solution.
  • the powder may for instance, preferably during the application of heat, be treated with a mercury salt such as mercuric chloride, and with an acid which dissolves tin but does not cause oxidation, for instance hydrochloric acid;
  • Another way is to treat the powder, also while heated, with superficial skin only of the acid solution is poured off and the powder washed with water until the wash water no longer shows any acid reactlon. he powder 1s then drled at low heat and when dry, is ready for use,'although it may be kept for a considerable time before using without deterloratlon.
  • a powdered substance for use in preparing dentalamalgam comprising finely divided silver alloy particles treated with mercury to form a thin superficial skin only of amalgam thereon.
  • a powdered substance for use in preparing dental amalgam comprising finely divided silver alloy particles and a relatively small amount of .mercury forming a thin amalgam on said particles.
  • ERIK WILHELM J SON VIRGIN.

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 May 5, 1931 PATENT OFFICE ERIK WILI-IELM FISCHER, or
STOCKHOLM, AND ERIK WILHELM J'zSON VIRGIN, DJ'URSHOLM, SWEDEN PROCESS FOR PRODUCING AMALGAMS TO BE USED IN DENTISTRY No Drawing. Application filed December 28, 1927, Serial No. 243,203, and. in Germany January 10, 1927.
This invention relates to an improved process for producing amalgams to be used in dentistry and more particularly to a specially prepared powder to be used in said process.
Tooth cement has hitherto been prepared by mixing a metal powder, for instance tin,
or more commonly an alloy such.v as silver and mation occurs so that the preparation of the cement has caused the dentist a considerable loss of time. By use of the common alloy powder the amalgamation continues after theamalgam has hardened which causes undesirable changes in the volume of the completed plug or filling.
This invention relates to the manufacture of a metal or alloy powder to be used for the production of amalgams for dentistry by means of which said disadvantages are avoided or substantially lessened. The improved results are obtained by providing the powder particles, in advance of use, with a thin superficial skin of mercury on their surface. This results in the V amalgamation being considerably facilitated and accelerated so that the use of such a prepared powder reduces the time required in mixing and kneading a quantity of powder in preparing fillings. The amalgamation will also be complete, or more nearly so, whereby when the amalgam is filled into the cavities no changes in volume of the plugs occur.
The treatment of the metal or alloy powder with mercury may suitably be carried out in the wet state and preferably in such a way that the powder is treated with finely divided mercury and a weakly c'orroding solution. The powder may for instance, preferably during the application of heat, be treated with a mercury salt such as mercuric chloride, and with an acid which dissolves tin but does not cause oxidation, for instance hydrochloric acid; Another way is to treat the powder, also while heated, with superficial skin only of the acid solution is poured off and the powder washed with water until the wash water no longer shows any acid reactlon. he powder 1s then drled at low heat and when dry, is ready for use,'although it may be kept for a considerable time before using without deterloratlon.
' We cla1m 1. An improved process for the production of silver alloy powder subsequently to be completely amalgamated in the production of dental fillings, consisting in treating the silver alloy particles with mercury in a quantity insufiicient to produce complete amalgamation.
2. A powdered substance for use in preparing dentalamalgam, comprising finely divided silver alloy particles treated with mercury to form a thin superficial skin only of amalgam thereon.
3; A powdered substance for use in preparing dental amalgam, comprising finely divided silver alloy particles and a relatively small amount of .mercury forming a thin amalgam on said particles.
4. The method of producing a material for use in preparing dental amalgam, which conslsts 1n sub ect1ng finely divided silver alloy powder to the action of a heated solution of mercuric chloride and hydrochloric acid so as to produce on the powder particles a thin superficialskin only of amalgam.
In testimony whereof we have hereunto set our hands.
ERIK WILHELM J: SON VIRGIN. ERIK .WILHELM FISCHER.
US243203A 1927-01-10 1927-12-28 Process for producing amalgams to be used in dentistry Expired - Lifetime US1803386A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE1803386X 1927-01-10

Publications (1)

Publication Number Publication Date
US1803386A true US1803386A (en) 1931-05-05

Family

ID=7744002

Family Applications (1)

Application Number Title Priority Date Filing Date
US243203A Expired - Lifetime US1803386A (en) 1927-01-10 1927-12-28 Process for producing amalgams to be used in dentistry

Country Status (1)

Country Link
US (1) US1803386A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3933961A (en) * 1974-12-13 1976-01-20 Pennwalt Corporation Tabletting spherical dental amalgam alloy
USRE29093E (en) * 1974-12-13 1976-12-28 Pennwalt Corporation Tabletting spherical dental amalgam alloy
US4306906A (en) * 1979-10-16 1981-12-22 Anderson Eugene R Method of making metallic amalgam
US4385892A (en) * 1981-03-20 1983-05-31 Atsushige Sato Setting compositions for dental purposes

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3933961A (en) * 1974-12-13 1976-01-20 Pennwalt Corporation Tabletting spherical dental amalgam alloy
USRE29093E (en) * 1974-12-13 1976-12-28 Pennwalt Corporation Tabletting spherical dental amalgam alloy
US4306906A (en) * 1979-10-16 1981-12-22 Anderson Eugene R Method of making metallic amalgam
US4385892A (en) * 1981-03-20 1983-05-31 Atsushige Sato Setting compositions for dental purposes

Similar Documents

Publication Publication Date Title
US1803386A (en) Process for producing amalgams to be used in dentistry
US2249694A (en) Material for taking impressions for dental or other purposes
Talaat et al. Effect of Two Remineralizing Agents on Initial Caries-like Lesions in Young Permanent Teeth: An in Vitro Study.
US2361161A (en) Basic filling for tooth cavities
PT96986B (en) PROCESS FOR THE PREPARATION OF PEPPER MASS FOR FILLING DISKLOCATED OLIVES
US2371688A (en) Molding composition
US2107637A (en) Method of making porous articles
DE607418C (en) Process for the production of a tooth filling from gold amalgam
NL167089C (en) PROCESS FOR THE PREPARATION OF A TOOTH POWDER COMPOSITION, WHICH CAN BE COMBINED WITH MERCURY FOR THE FORMATION OF AN AMALGAM FOR DENTAL PURPOSES.
JPS6171152A (en) Molding method of casting mold
US2403327A (en) Manufacture of photographic emulsions
Prinz Dental formulary
GB283488A (en) Improvements in and relating to processes for the production of amalgams to be used in dentistry
US2218755A (en) Composition of matter and method of preparation
DE364957C (en) Process for the production of art and everyday objects
Myers Electroformed die technique for rubber base impressions
DE515137C (en) Process for the production of a mercury-free tooth filling compound
CN110946881A (en) Pill for treating lung cancer and application thereof
JP2736940B2 (en) Fixing solution for alginate impression material
SU442935A1 (en) Coagulating substance in asbestos cement suspension
Dwight Copper plating of reversible hydrocolloid impressions
DE51633C (en) Dough molding process
US1172723A (en) Process for making dental cements.
US819249A (en) Dental filling.
CN104887523B (en) Sodium fluoride sustained release agent and preparation method thereof