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WO1994024222A1 - Composition hemostatique pour empreintes dentaires et son procede d'utilisation - Google Patents

Composition hemostatique pour empreintes dentaires et son procede d'utilisation Download PDF

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Publication number
WO1994024222A1
WO1994024222A1 PCT/US1993/003376 US9303376W WO9424222A1 WO 1994024222 A1 WO1994024222 A1 WO 1994024222A1 US 9303376 W US9303376 W US 9303376W WO 9424222 A1 WO9424222 A1 WO 9424222A1
Authority
WO
WIPO (PCT)
Prior art keywords
hydrocouoid
gel
hemostatic
agar
composition
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.)
Ceased
Application number
PCT/US1993/003376
Other languages
English (en)
Inventor
Thomas E. Hughes
Daniel N. Kottler
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
Priority to PCT/US1993/003376 priority Critical patent/WO1994024222A1/fr
Publication of WO1994024222A1 publication Critical patent/WO1994024222A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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Classifications

    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L5/00—Compositions of polysaccharides or of their derivatives not provided for in groups C08L1/00 or C08L3/00
    • C08L5/12—Agar or agar-agar, i.e. mixture of agarose and agaropectin; Derivatives thereof
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
    • A61K6/00—Preparations for dentistry
    • A61K6/90—Compositions for taking dental impressions

Definitions

  • the present invention relates to dental impression materials, namely gel compositions, and more particularly dental impression materials having a hemostatic property by virtue of the use of potassium sulfate in an aqueous-gel composition.
  • the dental professional uses impression materials to obtain impressions of teeth.
  • the impressions are used to fabricate crowns, inlays, and other dental prostheses.
  • Precision of the impression (mold) is a paramount consideration to ensure the subsequent comfort and fit of the prostheses.
  • the precision of the model is dependent on obtaining an accurate impression.
  • Precision impressions require high gel tensile strength in the gelled impression composition during removal from the teeth and through the use of the impression to form the plaster casts from which the prostheses are fabricated. Additionally, the existing periodontal condition may require pretreatment with a hemostatic compound to control bleeding prior to use of the gelled impression composition. Profuse bleeding in some patients frequently results in imprecise impressions, even after the use of hemostatic compounds.
  • reversible hydrocoUoid gels are obtained by mixing water and a gel base such as agar-agar, and tempering the gel in a conditioning bath until used.
  • the following patents relate to reversible hydrocoUoid gel impression materials, and have been considered in preparing this application: U.S. Patent No. 2,021,059 to Harrison; U.S. Patent No. 2,089,552 to Harrison; U.S. Patent No. 2,234,583 to Preble; and U.S. Patent No. 4,648,906 to Porteaus, et al.
  • Other patents which address agar based dental impression materials include U.S. Patent No.
  • none of the above patents address the problem of bleeding. Specifically, none of the impression materials of the foregoing patents discusses or implies that the impression material itself may be modified to include a hemostatic property.
  • the present invention is directed to a dental impression composition having hemostatic properties and superior plaster- model hardness characteristics, and more specifically to a hemostatic hydrocoUoid gel composition dental impression material.
  • the hemostatic hydrocoUoid gel composition dental impression material is formulated from an agar hydrocoUoid modified by the inclusion of potassium sulfate in the amount of between 4-12%, and preferably between about 4-6%.
  • the potassium sulfate acts as a hemostatic additive, to cause constriction of the blood vessels to terminate and prevent bleeding into the dental impression composition.
  • the hemostatic dental impression composition can be used in a one or two step process, wherein the material is first applied primarily for the purposes of controlling bleeding. After the hemostatic dental impression composition solidifies, it is removed and in certain cases results in an acceptable dental impression. In other cases, typically were the bleeding is more profuse, thefirst application will control the bleading and a second application of the hemostatic dental impression composition may be applied to form the dental impression. According to this process, only one impression material is required by the dentist to perform the procedure. Further, the hemostatic dental impression composition of the present invention reduces the irritation of the gingival tissue associated with hemostatic compounds and processes of the prior art.
  • Fig. 1 is a perspective view of a periodontal complex.
  • Fig. 2 is a perspective view of a periodontal complex of Fig. 1 including the hemostatic dental impression composition applied according to the present invention.
  • Fig. 3 is a perspective view of the dental impression.
  • Fig. 4 is a perspective view of a periodontal complex after removal of the dental impression.
  • the present composition includes a hydrocoUoid gel forming base in an aqueous reagent.
  • the base is typically agar-agar made from a red algae, for example from the genus gracilaria or gelidium and preferably the species g. robustum or g. nudifron, but may be any of the gel forming materials known in the art.
  • the hydrocoUoid gel is mixed with potassium sulfate, or a like sulfate having the proper hemostatic capability.
  • the potassium sulfate is preferably included in the range of between 4-12% by weight of the mixture.
  • Other minor trace constituents are also included, such as a pigment, a preservative, and modifying fillers.
  • the hemostatic hydrocoUoid gel preferably includes 8-12% agar, and 4-12% potassium sulfate by weight, with the balance being water.
  • the potassium sulfate is present in an amount of between about 4-6%
  • the trace components may be present in approximately l%.for the pigment, 0.1% for the preservative, 1-2% for the modifying fillers.
  • the modifying filler may be calcium sulfate or sodium borate or a similar material.
  • the hemostatic hydrocoUoid gel composition formulated to the above parameters exhibits the desired physical properties of flowability in the liquid state, and an appropriate degree of hardness following application to the periodontal complex.
  • the minimum standards are defined by the American Dental Specification No. 11.
  • the present hydrocoUoid gel composition has a compressive strength of at least 3500 grams per square centimeter and preferably about 4000 grams per square centimeter following solidification.
  • the hydrocoUoid gel composition is preferably blended in an appropriate container such as a stainless steel double boiler.
  • the blending process consists of mixing the agar powder and water together in the container while applying heat.
  • the temperature is preferably maintained at approximately one hundred degrees centigrade (100° C.) throughout the blending process.
  • the water and agar are blended to a smooth viscous state.
  • the potassium sulfate is added and allowed to completely dissolve.
  • the pigments, preservative and modifying fillers are added and allowed to completely dissolve.
  • the hydrocoUoid gel composition is preferably heated and mixed for approximately one hour after all of the constituents have been added.
  • the hydrocoUoid gel composition attains the appropriate consistency, the hydrocoUoid gel is transferred into appropriate containers suitable for shipping and use, wherein the hydrocoUoid gel composition sets to a desired gel state.
  • suitable containers include air and water tight plastic or glass ampules or syringes that a dentist may attach to a dispensing needle.
  • the containers may be filled with between about 1.5 and 60 milliliters of the hydrocoUoid gel composition.
  • the hydrocoUoid gel composition is first heated in a boiling water bath, and then applied to the periodontal complex at a temperature in the range of between about 60 and 65 degrees centigrade.
  • the material is applied directly to the periodontal complex in the fluid state.
  • Gauze may be applied to the hydrocoUoid gel composition prior to its solidifying to the rigid state.
  • the hydrocoUoid gel composition solidifies, and can be removed by the dentist.
  • one application of the hydrocoUoid gel composition is adequate to obtain an acceptable mold pattern.
  • the initial application of the hydrocoUoid gel composition will stop the bleeding, and a second application of the hydrocoUoid gel composition will produce an acceptable mold pattern or negative impression of the periodontal complex.
  • Fig. 1 is a perspective view of a periodontal complex 10 including a damaged tooth 12.
  • Fig. 2 is a perspective view of the periodontal complex 10 of Fig. 1, including the hemostatic hydrocoUoid gel dental impression composition 14 being applied using an applicator 16 to the damaged tooth 12, according to the present invention.
  • Fig. 4 is a perspective view of a periodontal complex 10 after removal of the dental impression 20 (Fig.3), illustrating the termination of the bleeding as a result of the use of the hemostatic hydrocoUoid gel dental impression composition 14 (Fig. 2) .

Landscapes

  • Health & Medical Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Oral & Maxillofacial Surgery (AREA)
  • Medicinal Chemistry (AREA)
  • Polymers & Plastics (AREA)
  • Organic Chemistry (AREA)
  • Chemical Kinetics & Catalysis (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

Matériau hémostatique pour prise d'empreintes dentaires constitué d'un gel hydrocolloïdal obtenu à partir d'un hydrocolloïde d'agar-agar modifié par l'ajout d'environ 4 à 12 % en poids de sulfate de potassium. Ce dernier agit comme additif hémostatique en provoquant la constriction des vaisseaux sanguins et en empêchant le saignement, dans la composition pour empreintes dentaires.
PCT/US1993/003376 1993-04-09 1993-04-09 Composition hemostatique pour empreintes dentaires et son procede d'utilisation Ceased WO1994024222A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PCT/US1993/003376 WO1994024222A1 (fr) 1993-04-09 1993-04-09 Composition hemostatique pour empreintes dentaires et son procede d'utilisation

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/US1993/003376 WO1994024222A1 (fr) 1993-04-09 1993-04-09 Composition hemostatique pour empreintes dentaires et son procede d'utilisation

Publications (1)

Publication Number Publication Date
WO1994024222A1 true WO1994024222A1 (fr) 1994-10-27

Family

ID=22236497

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/US1993/003376 Ceased WO1994024222A1 (fr) 1993-04-09 1993-04-09 Composition hemostatique pour empreintes dentaires et son procede d'utilisation

Country Status (1)

Country Link
WO (1) WO1994024222A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2013142068A (ja) * 2012-01-11 2013-07-22 Shofu Inc アルカリ処理工程を有する歯科用寒天印象材組成物
JP2013142069A (ja) * 2012-01-11 2013-07-22 Shofu Inc アルカリ金属塩を含む歯科口腔内用寒天印象材組成物

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2089552A (en) * 1935-10-14 1937-08-10 Oramold Products Corp Impression material and method for making impression material
US2234383A (en) * 1939-10-28 1941-03-11 Surgident Ltd Dental impression composition
US2422497A (en) * 1945-12-22 1947-06-17 Stanley E Noyes Dental impression composition
US4060421A (en) * 1975-12-16 1977-11-29 Ikuji Yoshikawa Combined reversible aqueous colloidal dental impression material
US4242239A (en) * 1979-06-11 1980-12-30 Warner-Lambert Bondable agar dental impression material
US5132118A (en) * 1990-05-11 1992-07-21 Mills John A Treatment of exercise-induced pulmonary hemorrhage in animals

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2089552A (en) * 1935-10-14 1937-08-10 Oramold Products Corp Impression material and method for making impression material
US2234383A (en) * 1939-10-28 1941-03-11 Surgident Ltd Dental impression composition
US2422497A (en) * 1945-12-22 1947-06-17 Stanley E Noyes Dental impression composition
US4060421A (en) * 1975-12-16 1977-11-29 Ikuji Yoshikawa Combined reversible aqueous colloidal dental impression material
US4242239A (en) * 1979-06-11 1980-12-30 Warner-Lambert Bondable agar dental impression material
US5132118A (en) * 1990-05-11 1992-07-21 Mills John A Treatment of exercise-induced pulmonary hemorrhage in animals

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
HAWLEY'S CHEMICAL DICTIONARY, 1987, N. IRVING SAX AND RICHARD J. LEWS SR., page 27. *

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2013142068A (ja) * 2012-01-11 2013-07-22 Shofu Inc アルカリ処理工程を有する歯科用寒天印象材組成物
JP2013142069A (ja) * 2012-01-11 2013-07-22 Shofu Inc アルカリ金属塩を含む歯科口腔内用寒天印象材組成物

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