WO1996037182A1 - Chewing gum with fluoride and citric acid - Google Patents
Chewing gum with fluoride and citric acid Download PDFInfo
- Publication number
- WO1996037182A1 WO1996037182A1 PCT/US1995/006775 US9506775W WO9637182A1 WO 1996037182 A1 WO1996037182 A1 WO 1996037182A1 US 9506775 W US9506775 W US 9506775W WO 9637182 A1 WO9637182 A1 WO 9637182A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- fluoride
- citric acid
- chewing gum
- enamel
- tooth
- Prior art date
Links
Classifications
-
- A—HUMAN NECESSITIES
- A23—FOODS OR FOODSTUFFS; TREATMENT THEREOF, NOT COVERED BY OTHER CLASSES
- A23G—COCOA; COCOA PRODUCTS, e.g. CHOCOLATE; SUBSTITUTES FOR COCOA OR COCOA PRODUCTS; CONFECTIONERY; CHEWING GUM; ICE-CREAM; PREPARATION THEREOF
- A23G4/00—Chewing gum
- A23G4/06—Chewing gum characterised by the composition containing organic or inorganic compounds
-
- A—HUMAN NECESSITIES
- A23—FOODS OR FOODSTUFFS; TREATMENT THEREOF, NOT COVERED BY OTHER CLASSES
- A23G—COCOA; COCOA PRODUCTS, e.g. CHOCOLATE; SUBSTITUTES FOR COCOA OR COCOA PRODUCTS; CONFECTIONERY; CHEWING GUM; ICE-CREAM; PREPARATION THEREOF
- A23G4/00—Chewing gum
- A23G4/06—Chewing gum characterised by the composition containing organic or inorganic compounds
- A23G4/064—Chewing gum characterised by the composition containing organic or inorganic compounds containing inorganic compounds
-
- A—HUMAN NECESSITIES
- A23—FOODS OR FOODSTUFFS; TREATMENT THEREOF, NOT COVERED BY OTHER CLASSES
- A23G—COCOA; COCOA PRODUCTS, e.g. CHOCOLATE; SUBSTITUTES FOR COCOA OR COCOA PRODUCTS; CONFECTIONERY; CHEWING GUM; ICE-CREAM; PREPARATION THEREOF
- A23G4/00—Chewing gum
- A23G4/06—Chewing gum characterised by the composition containing organic or inorganic compounds
- A23G4/08—Chewing gum characterised by the composition containing organic or inorganic compounds of the chewing gum base
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
- A61K8/00—Cosmetics or similar toiletry preparations
- A61K8/18—Cosmetics or similar toiletry preparations characterised by the composition
- A61K8/19—Cosmetics or similar toiletry preparations characterised by the composition containing inorganic ingredients
- A61K8/20—Halogens; Compounds thereof
- A61K8/21—Fluorides; Derivatives thereof
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
- A61K8/00—Cosmetics or similar toiletry preparations
- A61K8/18—Cosmetics or similar toiletry preparations characterised by the composition
- A61K8/30—Cosmetics or similar toiletry preparations characterised by the composition containing organic compounds
- A61K8/33—Cosmetics or similar toiletry preparations characterised by the composition containing organic compounds containing oxygen
- A61K8/36—Carboxylic acids; Salts or anhydrides thereof
- A61K8/365—Hydroxycarboxylic acids; Ketocarboxylic acids
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61Q—SPECIFIC USE OF COSMETICS OR SIMILAR TOILETRY PREPARATIONS
- A61Q11/00—Preparations for care of the teeth, of the oral cavity or of dentures; Dentifrices, e.g. toothpastes; Mouth rinses
Definitions
- the present invention relates to a chewing gum with organoleptic properties which possesses fluoride and citric acid for improved dental health.
- Fluoride compounds have been incorporated into dental topicals and into consumables for the prevention of tooth decay. This prevention is by virtue of such effects as strengthening of the enamel, suppression of the enzymatic action of bacteria which convert saccharids into acids and suppression of the propagation of microorganisms relating to the corrosion destruction of enamel and dentine. Studies have demonstrated that fluoride combines with hydroxyapatite, the crystalline structure of the teeth, to produce a modified crystalline structure which is more resistant to acid attack.
- fluorides have been disclosed in the prior art, including sodium fluoride, indium fluoride, sodium monofluorophosphate, stannous fluoride, fluoroalkyl phosphates, and quaternary ammonium fluorides. These and other fluorides have been incorporated into gels, rinses, toothpastes, tooth powder, chewing gum and the like for topical application. Fluoride treatment can also be undertaken through consumables, fluoridated drinking water and fluoride tablets. It has been definitely established, on the basis of large studies in a number of communities that the fluoridation of water to a concentration of 1.0 ppm is a safe and practical public health measure. The resultant effect is 50-66% reduction in the incidents of dental carries in permanent teeth. It has also been demonstrated, in a 15 year study, that the administration of sodium fluoride in relatively small amounts during pregnancy resulted in almost complete elimination of dental carries in subsequently born children. (Glenn, Journal of Dentistry for Children, January 1980.)
- the chewing gum of the present invention relates to a chewing gum that has a novel mechanism whereby fluoride is incorporated into the prism layers (pores) of the enamel tooth structure.
- the chewing gum of the present invention incorporates the biochemical reaction which momentarily takes place following the exposure of dental enamel to citric acid at the microscopic level. This reaction is a natural occurrence which results multiple times on a daily basis each and every time one ingests any of the citrus fruits in the market.
- This pore opening is the pathway for fluoride, which is within the gum product, to penetrate into the prismatic layers of the tooth structure.
- the specific fruits which are primarily citric acid in nature are: oranges, grapefruits, lemons, limes, tangerines, and the like.
- the combination of such a citric acid with fluoride creates a momentary micro-atmosphere for a pathway which enables the fluoride to ingress into the prism layers of the enamel.
- This mechanism in a chewing gum having organoleptic properties would produce an enhanced flavor and sweetness impact which would make this product a standout for both taste and optimum dental health.
- the product includes a natural high impact aromatic flavor from these fresh and biocompatible agents.
- composition of this invention comprises a chewing gum base, citric acid derived from fruits, flavoring, and an oral health agent.
- the chewing gum composition generally comprises one or more natural or synthetic elastomers and can be supplemented by conventional chewing gum ingredients. These ingredients include one or more solvents, plasticizers, fillers, flavoring agents, coloring agents and/or sweetening agents.
- Elastomers which are suitable for use herein include substances of vegetable origin such as chicle, jelutong, gutta percha, guayule, and crown gum. Synthetic elastomers such as butadiene-styrene copolymers, isobutyleneisoprene copolymers, polyethylene, polyisobutylene, polyvinylacetate, and mixtures thereof are also useful.
- the elastomer generally comprises from about 14% to 50% by weight (preferably from about 20% to about 30% by weight) of the chewing gum composition.
- the chewing gum composition can contain elastomer solvents to aid in softening the polymer component.
- elastomer solvents can include methyl, glycerol or pentaerythritol esters of rosins or modified rosins, such as hydrogenated, dimerized or polymerized rosins or mixtures thereof.
- Examples of elastomer solvents suitable for use herein include pentaerythritol ester of partially hydrogenated, dimerized or polymerized rosins or mixtures thereof.
- elastomer solvents suitable for use herein include pentaerythritol ester of partially hydrogenated wood rosin, pentaerythritol ester of wood rosin, glycerol ester of partially dimerized rosin, glycerol ester of polymerized rosin, glycerol ester of tall oil rosin, glycerol ester of wood rosin, and partially hydrogenated wood rosin, and partially hydrogenated methyl ester of rosin, and mixtures thereof.
- Terpene resins, including polyterpene and mixtures thereof are also useful.
- the solvent can be employed in an amount ranging from about 10% to about 75% and preferably about 15% to about 50% by weight of the chewing gum composition.
- a variety of traditional ingredients used as plasticizers, softeners or emulsifiers such as lanolin, lecithin, glyceryl monostearate, stearic acid, sodium stearate, potassium stearate, glyceryl triacetate, triacetin, glycerin, and the like as well as natural waxes, petroleum waxes, paraffin waxes, and microcrystalline waxes, can also be incorporated into the chewing gum composition to obtain a variety of desirable textures and consistency properties.
- These additional materials are generally employed in amounts of up to about 30% by weight, preferably about 1 % to about 25% by weight and more preferably from about 3% to about 7% by weight of the final chewing gum composition.
- the chewing gum composition can additionally include conventional coloring agents such as titanium dioxide, and fillers such as dicalcium phosphate, aluminum hydroxide, alumina, aluminum silicates, talc, calcium carbonate, cellulose, and combinations thereof.
- the flavoring compositions are natural sugars consisting of citrus type fruits for elicitation of natural sweet flavors such as lemons, limes, tangerines, grapefruits, and oranges. All contain natural sugars in the fructose group of sugars.
- the sugar groups are sugar alcohols which include sorbitol mannitol, xylitol, maltitol, and hydrogenated starch and glucose syrups produced by catalytic hydrogenation of carbohydrate syrups to the point where all carbohydrate end groups are reduced to alcohols.
- a suitable hydrogenated starch hydrolysate includes from about 6% to 10% sorbitol, from about 25% to about 55% maltitol and from 20% to about 40% hydrogenated higher saccharides.
- a typical hydrogenated starch hydrolysate is Lycasin (RTM).
- the amount of flavoring agents and/or flavor enhancers employed is normally a matter of preference, subject to such factors as flavor type, base type, and strength desired. In general, amounts of about 0.05% to about 3.0% by weight of the final composition are usable with amounts of about 0.3% to about 1.5% being preferred and about 0.7% to about 1.2% being more preferred.
- the oral health agent takes the form of a fluoride which is added in levels of from about 0.001 % to about 1 % by weight for anti-caries purposes. It is a feature of the present invention which can provide substantially improved release of fluoride in comparison with that provided by conventional fluoride chewing gum products.
- Preferred fluorides are sodium fluoride, stannous fluoride, indium fluoride, sodium monofluorophosphate, fluoroalkyl phosphates, and quaternary ammonium fluorides.
- a composition is prepared having the following
- the gum base consists of styrene butadiene elastomer, polyvinylacetate resin, a rosin ester, microcrystalline wax, and calcium carbonate.
- the chewing gum composition is prepared by warming the gum base to about 50° C. in a kneader, adding the glycerol, xylitol solution, and peppermint oil, all prewarmed to about 50 °C, in the kneader, adding the xylitol powder and mixing until a homogeneous mass is achieved.
Abstract
Description
Claims
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
AU28149/95A AU2814995A (en) | 1995-05-26 | 1995-05-26 | Chewing gum with fluoride and citric acid |
CA002222170A CA2222170A1 (en) | 1995-05-26 | 1995-05-26 | Chewing gum with fluoride and citric acid |
PCT/US1995/006775 WO1996037182A1 (en) | 1995-05-26 | 1995-05-26 | Chewing gum with fluoride and citric acid |
US08/768,886 US5698215A (en) | 1994-03-28 | 1996-12-17 | Chewing gum composition with fluoride and citric acid |
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CA002222170A CA2222170A1 (en) | 1995-05-26 | 1995-05-26 | Chewing gum with fluoride and citric acid |
PCT/US1995/006775 WO1996037182A1 (en) | 1995-05-26 | 1995-05-26 | Chewing gum with fluoride and citric acid |
US08/768,886 US5698215A (en) | 1994-03-28 | 1996-12-17 | Chewing gum composition with fluoride and citric acid |
Publications (1)
Publication Number | Publication Date |
---|---|
WO1996037182A1 true WO1996037182A1 (en) | 1996-11-28 |
Family
ID=27170553
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/US1995/006775 WO1996037182A1 (en) | 1994-03-28 | 1995-05-26 | Chewing gum with fluoride and citric acid |
Country Status (4)
Country | Link |
---|---|
US (1) | US5698215A (en) |
AU (1) | AU2814995A (en) |
CA (1) | CA2222170A1 (en) |
WO (1) | WO1996037182A1 (en) |
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US6586023B1 (en) | 1998-12-15 | 2003-07-01 | Wm. Wrigley Jr. Company | Process for controlling release of active agents from a chewing gum coating and product thereof |
US6627234B1 (en) | 1998-12-15 | 2003-09-30 | Wm. Wrigley Jr. Company | Method of producing active agent coated chewing gum products |
US6531114B1 (en) | 1999-04-06 | 2003-03-11 | Wm. Wrigley Jr. Company | Sildenafil citrate chewing gum formulations and methods of using the same |
US6235318B1 (en) | 1999-01-21 | 2001-05-22 | Charles M. Lombardy, Jr. | Effervescent chewing gum |
US6773716B2 (en) | 1999-04-06 | 2004-08-10 | Wm. Wrigley Jr. Company | Over-coated chewing gum formulations |
US6355265B1 (en) | 1999-04-06 | 2002-03-12 | Wm. Wrigley Jr. Company | Over-coated chewing gum formulations |
US6322806B1 (en) | 1999-04-06 | 2001-11-27 | Wm. Wrigley Jr. Company | Over-coated chewing gum formulations including tableted center |
US7935362B2 (en) | 1999-04-06 | 2011-05-03 | Wm. Wrigley Jr. Company | Over-coated product including consumable center and medicament |
US6726922B1 (en) | 1999-06-28 | 2004-04-27 | Minu, L.L.C. | Process and composition for temporarily suppressing pain |
US20040219110A1 (en) * | 1999-06-28 | 2004-11-04 | Minu , L.L.C. | Process for removing calculus deposits from the teeth and suppressing pain |
US6436429B1 (en) | 1999-06-28 | 2002-08-20 | Gholam A. Peyman | Process and composition for temporarily suppressing pain |
US20040220151A1 (en) * | 1999-06-28 | 2004-11-04 | Minu, L.L.C. | Process for treating tissue and suppressing pain |
US6569472B1 (en) | 2000-09-01 | 2003-05-27 | Wm. Wrigley Jr. Company | Coated chewing gum products containing antacid and method of making |
US6663849B1 (en) | 2000-09-01 | 2003-12-16 | Wm. Wrigley Jr. Company | Antacid chewing gum products coated with high viscosity materials |
US6541048B2 (en) | 1999-09-02 | 2003-04-01 | Wm. Wrigley Jr. Company | Coated chewing gum products containing an acid blocker and process of preparing |
US6645535B2 (en) | 1999-09-02 | 2003-11-11 | Wm. Wrigley Jr. Company | Method of making coated chewing gum products containing various antacids |
US9387168B2 (en) | 1999-09-20 | 2016-07-12 | Jack Barreca | Chewing gum with tomatidine |
US6491540B1 (en) | 1999-09-20 | 2002-12-10 | Jack Barreca | Center-filled supplement gum |
US9253991B2 (en) | 1999-09-20 | 2016-02-09 | Jack Barreca | Chewing gum with B vitamins |
US6471945B2 (en) * | 2000-03-10 | 2002-10-29 | Warner-Lambert Company | Stain removing chewing gum and confectionery compositions, and methods of making and using the same |
US6479071B2 (en) * | 2000-03-10 | 2002-11-12 | Warner-Lambert Company | Chewing gum and confectionery compositions with encapsulated stain removing agent compositions, and methods of making and using the same |
US6485739B2 (en) * | 2000-03-10 | 2002-11-26 | Warner-Lambert Company | Stain removing chewing gum and confectionery compositions, and methods of making and using the same |
US6572900B1 (en) | 2000-06-09 | 2003-06-03 | Wm. Wrigley, Jr. Company | Method for making coated chewing gum products including a high-intensity sweetener |
US6444241B1 (en) | 2000-08-30 | 2002-09-03 | Wm. Wrigley Jr. Company | Caffeine coated chewing gum product and process of making |
US6696043B2 (en) * | 2000-09-20 | 2004-02-24 | Scientific Pharmaceuticals, Inc. | Teeth whitening composition in the form of a chewing gum |
US6579545B2 (en) | 2000-12-22 | 2003-06-17 | Wm. Wrigley Jr. Company | Coated chewing gum products containing an antigas agent |
US8524198B2 (en) | 2003-06-20 | 2013-09-03 | Donald W. Bailey | Xylitol dental maintenance system |
US20100158820A1 (en) * | 2003-06-20 | 2010-06-24 | Bailey Donald W | Xylitol dental maintenance system |
US8389032B2 (en) | 2005-05-23 | 2013-03-05 | Kraft Foods Global Brands Llc | Delivery system for active components as part of an edible composition having selected particle size |
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US8389031B2 (en) | 2005-05-23 | 2013-03-05 | Kraft Foods Global Brands Llc | Coated delivery system for active components as part of an edible composition |
US7955630B2 (en) | 2004-09-30 | 2011-06-07 | Kraft Foods Global Brands Llc | Thermally stable, high tensile strength encapsulated actives |
US7727565B2 (en) | 2004-08-25 | 2010-06-01 | Cadbury Adams Usa Llc | Liquid-filled chewing gum composition |
US9198448B2 (en) | 2005-02-07 | 2015-12-01 | Intercontinental Great Brands Llc | Stable tooth whitening gum with reactive ingredients |
US7851006B2 (en) | 2005-05-23 | 2010-12-14 | Cadbury Adams Usa Llc | Taste potentiator compositions and beverages containing same |
WO2006127934A2 (en) | 2005-05-23 | 2006-11-30 | Cadbury Adams Usa, Llc | Taste potentiator compositions and edible confectionery and chewing gum products containing same |
US7851005B2 (en) | 2005-05-23 | 2010-12-14 | Cadbury Adams Usa Llc | Taste potentiator compositions and beverages containing same |
DE102005049973A1 (en) * | 2005-10-17 | 2007-04-19 | Henkel Kgaa | Tingling oral and dental care and cleansers II |
EP2001436B1 (en) | 2006-04-05 | 2017-01-04 | Intercontinental Great Brands LLC | Calcium phosphate complex and salts in oral delivery systems |
MX2008012520A (en) * | 2006-04-05 | 2008-10-10 | Cadbury Adams Usa Llc | Impact of calcium phosphate complex on dental caries. |
JP5856288B2 (en) | 2011-04-29 | 2016-02-09 | インターコンチネンタル グレート ブランズ エルエルシー | Encapsulated acid, method for preparing encapsulated acid, and chewing gum containing encapsulated acid |
KR101519581B1 (en) | 2013-08-22 | 2015-05-13 | (주) 덴바이오 | Fluoride varnish compositions |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0162574A2 (en) * | 1984-04-18 | 1985-11-27 | JOHNSON & JOHNSON | Oral hygiene compositions |
US5225197A (en) * | 1989-04-28 | 1993-07-06 | Beecham Group Plc | Pharmaceutical formulation |
Family Cites Families (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4233288A (en) * | 1979-03-12 | 1980-11-11 | Cornell John A | Gum emulsified liquid package for delivering and preserving liquid content in the mouth |
DE3213284A1 (en) * | 1982-04-08 | 1983-10-13 | Winfried 8451 Kümmersbruck Kruppa | ANTI-CARIES CHEWING GUM |
US4563345A (en) * | 1984-01-23 | 1986-01-07 | Arrick Robert A | Chewing gum |
EP0370296B1 (en) * | 1988-11-25 | 1994-01-19 | The Procter & Gamble Company | Chewing gum |
-
1995
- 1995-05-26 WO PCT/US1995/006775 patent/WO1996037182A1/en active Application Filing
- 1995-05-26 CA CA002222170A patent/CA2222170A1/en not_active Abandoned
- 1995-05-26 AU AU28149/95A patent/AU2814995A/en not_active Abandoned
-
1996
- 1996-12-17 US US08/768,886 patent/US5698215A/en not_active Expired - Fee Related
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0162574A2 (en) * | 1984-04-18 | 1985-11-27 | JOHNSON & JOHNSON | Oral hygiene compositions |
US5225197A (en) * | 1989-04-28 | 1993-07-06 | Beecham Group Plc | Pharmaceutical formulation |
Also Published As
Publication number | Publication date |
---|---|
AU2814995A (en) | 1996-12-11 |
US5698215A (en) | 1997-12-16 |
CA2222170A1 (en) | 1996-11-28 |
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