Classifications

• • 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
  • A61K8/72—Cosmetics or similar toiletry preparations characterised by the composition containing organic macromolecular compounds
  • A61K8/81—Cosmetics or similar toiletry preparations characterised by the composition containing organic macromolecular compounds obtained by reactions involving only carbon-to-carbon unsaturated bonds
• • A—HUMAN NECESSITIES
  • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
  • A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
  • A61K8/00—Cosmetics or similar toiletry preparations
  • A61K8/02—Cosmetics or similar toiletry preparations characterised by special physical form
  • A61K8/0208—Tissues; Wipes; Patches
• • 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
  • A61K8/72—Cosmetics or similar toiletry preparations characterised by the composition containing organic macromolecular compounds
  • A61K8/73—Polysaccharides
• • A—HUMAN NECESSITIES
  • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
  • A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
  • A61K9/00—Medicinal preparations characterised by special physical form
  • A61K9/70—Web, sheet or filament bases ; Films; Fibres of the matrix type containing drug
• • A—HUMAN NECESSITIES
  • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
  • A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
  • A61K9/00—Medicinal preparations characterised by special physical form
  • A61K9/70—Web, sheet or filament bases ; Films; Fibres of the matrix type containing drug
  • A61K9/7023—Transdermal patches and similar drug-containing composite devices, e.g. cataplasms
  • A61K9/703—Transdermal patches and similar drug-containing composite devices, e.g. cataplasms characterised by shape or structure; Details concerning release liner or backing; Refillable patches; User-activated patches
  • A61K9/7038—Transdermal patches of the drug-in-adhesive type, i.e. comprising drug in the skin-adhesive layer
  • A61K9/7046—Transdermal patches of the drug-in-adhesive type, i.e. comprising drug in the skin-adhesive layer the adhesive comprising macromolecular compounds
  • A61K9/7053—Transdermal patches of the drug-in-adhesive type, i.e. comprising drug in the skin-adhesive layer the adhesive comprising macromolecular compounds obtained by reactions only involving carbon to carbon unsaturated bonds, e.g. polyvinyl, polyisobutylene, polystyrene
• • A—HUMAN NECESSITIES
  • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
  • A61P—SPECIFIC THERAPEUTIC ACTIVITY OF CHEMICAL COMPOUNDS OR MEDICINAL PREPARATIONS
  • A61P23/00—Anaesthetics
• • A—HUMAN NECESSITIES
  • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
  • A61P—SPECIFIC THERAPEUTIC ACTIVITY OF CHEMICAL COMPOUNDS OR MEDICINAL PREPARATIONS
  • A61P23/00—Anaesthetics
  • A61P23/02—Local anaesthetics
• • 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

• This invention relates generally to film compositions for use in the delivering topical and/or systemic actives, and more particularly to a slow dissolving or disintegrating strips, especially for delivering oral agents to the teeth and gums.
• Delivery devices are well known for delivering oral care actives to the surface of the teeth and/or the oral tissue of the mouth. These devices typically take the form of a flexible, oral strip or film comprising an adhesive surface and a suitable oral care active.
• the most notable of such film compositions relates to the over-the-counter teeth whitening systems now available, including a whitening system comprised of a thin strip of plastic film having applied to a surface thereof a tooth whitening composition as described in U.S. Pat. Nos. 5,894,017, 5,891,453 and 6,045,811.
• a problem with such film compositions however, relates to the dissolution rate of the film compositions and, more specifically, to controlling the dissolution rate of such film compositions.
• the film composition should not be present in the mouth for long periods, but dissolve or disintegrate slow enough such that the oral care active has time to exert its activity.
• controlling film dissolution rates also facilitates the improvement of other film benefits such as barrier protection.
• the present inventor has found that by manipulating the individual water- soluble layers forming a multi-layered film, improved control over the dissolution rate of the multi-layered film is achieved.
• the present inventor has discovered that the dissolution rate of multilayered films can be controlled by superimposing at least two (2) water soluble layers. The components of these superimposed layers interact with each other to form new component with much lower dissolution or disintegration rate.
• the at least two (2) layers can be formed any number of ways, for example, by simply using oppositely charged water soluble polymers to produce the respective layers. Or, alternatively, the at least two layers can be formed by adding at least one polyvalent cationic ion source to at least one neutrally charged water soluble polymer to form one layer and using a negatively charged water soluble polymer to form another layer.
• the interacting layers can also be formed by superimposing a water soluble layer comprising either an anionic or cationic surfactant and a neutrally charged polymer with a water soluble layer comprising a neutrally charged polymer and a water soluble salt. Accordingly an aspect of the present invention is to provide film products which dissolve slowly in the oral cavity.
• One more aspect of the invention is the use of water soluble materials in both layers so as not to require organic solvents, which reduces costs, and improves safety of manufacturing.
• the present invention relates to multi-layer, stand alone, film compositions, comprising: a.) a first water-soluble layer comprising : i.) a neutral, water soluble polymer; and ii.) a polyvalent cationic ion source; and b.) a second water-soluble layer comprising anionic water soluble polymer; wherein the multi-layer film composition dissolves or disperses in water at a rate slower than any of the individual water-soluble layers.
• the present invention relates to multi-layer, stand alone, film compositions, comprising: a.) a first water -soluble layer comprising a cationic polymer; and b.) a second water-soluble layer comprising a anionic polymer wherein the multi-layer film composition dissolves or disperses in water at a rate slower than any of the individual water-soluble layers.
• the present invention relates to multi -layer, stand alone, film compositions, comprising: a.) a first water-soluble layer comprising: a.) a neutral water soluble polymer; and ii.) an anionic surfactant; and b.) a second water-soluble layer comprising a cationic water soluble polymer wherein the multi-layer film composition dissolves or disperses in water at a rate slower than any of the individual water-soluble layers.
• the present invention relates to multii-layer, stand alone, film compositions, comprising: a.) a first water-soluble layer comprising: i.) a neutral water soluble polymer; and ii.) a cationic surfactant; and b.) a second water-soluble layer comprising an anionic water soluble polymer; wherein the multi-layer film composition dissolves or disperses in water at a rate slower than any of the individual water-soluble layers.
• the present invention relates to multi-layer, stand alone, film compositions, comprising : a.) a first water-soluble layer comprising : i.) a neutral water soluble polymer; and ii.) an anionic or a cationic surfactant; and b.) a second water-soluble layer comprising: i.) a neutral water soluble polymer; ii.) water-soluble salt, wherein the multi-layer film composition dissolves or disperses in water at a rate slower than any of the individual water-soluble layers.
• Methods of manufacturing and using are also disclosed. DETAILED DESCRIPTION OF THE PRESENT INVENTION
• the film compositions of the present invention can comprise, consist of, or consist essentially of the essential elements and limitations of the invention described herein, as well any of the additional or optional ingredients, components, or limitations described herein. All percentages, parts and ratios are based upon the total weight of the wet film composition of the present invention, unless otherwise specified. All sucli weights as they pertain to the listed ingredients are based on the active level and, therefore, do not include carriers or by-products that may be included in commercially available materials, unless otherwise specified.
• safe and effective amount means an amount of a compound or composition such as a topical or system active sufficient to significantly induce a positive benefit, for example, a teeth whitening, antimicrobial and/or analgesic benefit, including independently the benefits disclosed herein, but low enough to avoid serious side effects, i.e., to provide a reasonable benefit to risk ratio, within the scope of sound judgment of the skilled artisan.
• adheresive means any material or composition that is capable of sticking to the site of topical application or administration and includes, but is no limited to, mucoadhesives, pressure-sensitive adhesive (adheres upon application of pressure), moistenable adhesives (adheres in the presence of water) and tacky or sticky type adhesives (adheres upon immediate contact with a surface).
• charged entity includes, but is not limited to, anionic or cationic polymers, anionic or cationic surfactants, water soluble salts, polyvalent cationic sources and mixtures thereof.
• foreign substances as used herein means dirt, infectious microorganisms and the like.
• the film compositions of the present invention are clear.
• the term “clear” as defined herein ranges from transparent to translucent as observed with the naked eye.
• the film compositions of the present invention, including the essential and optional components thereof, are described in detail hereinafter.
• non-ionic or charge neutral polymers cationic or anionic water soluble polymers can be used in forming the film compositions of the present invention.
• suitable water soluble polymers include, but are not limited to, alkylcelluloses such as methylcellulose, hydroxyalkylcelluloses such as hydroxybutyl cellulose, hydroxylethylmethyl .
• cellulose hydroxyethylcellulose and hydroxypropylcellulose
• hydroxyalkyl alkylcelluloses such as hydroxypropyl methylcellulose
• carboxyalkylcelluloses such as carboxymethylcellulose
• alkali metal salts of carboxyalkylcelluloses such as sodium carboxymethylcellulose
• carboxyalkylalkylcelluloses such as carboxymethyl ethyl cellulose
• carboxyalkylcellulose esters starches; pectins such as sodium carboxymethylamylopectin; chitin derivatives such as chitosan
• cationic polymers such as polyquaternium-10, polyquaternium-16, polyquaternium-28, polyq aternium- 44, polyquaternium-46, polyquatemium-55, vinylpyrrolidone/dimethylaminopropyl methacrylamide copolymer, vinylpyrrolidone/dimethylaminoethyl methacrylate S copolymer; polysaccharides such as
• Non-ionic Polymers are, for example, hydroxyethyl cellulose, hydroxypropyl cellulose, hydroxypropyl methylcellulose, methylcellulose, polyvinyl alcohol, polyvinyl alcohol copolymers or derivatives, vinyl acetate-vinyl alcohol copolymers, polyvinylpyrrolidone, hydrolyzed polyvinylpyrrolidone, polyacrylamide, poly(methacrylamide), dextran, polyethylene glycol, and polyoxyethylene and polyoxypropylene block copolymers and mixtures thereof.
• the neutxal or non-ionic water soluble polymers include, but are not limited to hydroxyethyl cellulose (HEC), hydroxypropyl cellulose
• HPC polyvinylpyrrolidone
• PVP polyvinylpyrrolidone
• HEC hydroxypropyl methylcellulose
• MC methylcellulose
• PEG polyethylene glycol
• PVA polyvinyl alcob-ol
• the neutral or non-ionic water soluble polymer is present at a concentration of from about 0.1% to about 50% optionally, from about 0.2% to about 40%, and, optionally, from about 0.5% to about 30%, by weight, of the wet film composition.
• Anionic water-soluble polymers according to the invention include, but are not limited to, sodium carboxymethylcellulose, sodium carboxymethyl hydroxyethylcellulose, pectin, carrageenan, carboxymethylguar gum, sodium alginate, anionic polyacrylamide copolymers, alkali-soluble latex, carboxymethyl methylcellulose, carboxymethyl hydroxypropyl guar, and other anionic carbohydrate derivatives, as well as mixtures including one or more of these polymers.
• Other suitable anionic polymers include polymaleic acid, polysulfonates, and mixtures thereof. Additional anionic polymeric polycarboxylates, such as Gantrez, are described in U.S. Pat. No.
• the anionic polymer is a carboxyvinyl polymer.
• Carboxyvinyl polymers are described in U.S. Pat. No. 2,798,053 to Brown, issued Jul. 2, 1957, herein incorporated by reference in its entirety.
• Carboxyvinyl polymers are provided by B. F. Goodrich Company as Carbopol® 934, 940, 941, 946, and 956. Mixtures of these anionic polymers can also be used herein.
• anionic water- soluble first ionic polymer Commercially available products which may be used as the anionic water- soluble first ionic polymer, or as a component thereof, include CMC-9M31 (sodium carboxymethylcellulose; Hercules Incorporated), CMHC 420H (carboxymethyl hydroxyethylcellulose; Hercules Incorporated), Pectin LM104 AS-Z (anionic pectin; Hercules Incorporated), Gelcarin GP 911 brand carrageenan (FMC Biopolymer, Philadelphia, PA.), Galactosol (carboxymethyl guar gum, Hercules Incorporated), Alcogum L-29 (an alkali-soluble latex; Alco Products), Kelgin MN (sodium alginate; Kelco, San Diego), Reten 215 (anionic polyacrylamide; Hercules Incorporated) or mixtures thereof.
• CMC-9M31 sodium carboxymethylcellulose; Hercules Incorporated
• the anionic polymer includes sodium carboxymethylcellulose (supplied by Hercules, Wilmington, DE), pectin (supplied by Hercules, Wilmington, DE), carrageenan, sodium alginate (supplied Keltone HNCR, ISP Alginates, San Diego, CA.), sodium polyacrylate (supplied as ⁇ ihon Junyaku, Tokio, Japan), sodium polymethacrylate (supplied as Darvan #7, R.T. Nanderbilt, ⁇ orwalk, CT.), sodium maleate/methyl vinyl ether copolymer (supplied as Gantrez S- 97, ISP, Wayne, ⁇ J) as well as mixtures including one or more of these polymers.
• the anionic water soluble polymer is present at a concentration- of from about 0.01% to about 50% optionally, from about 0.1% to about 40%, and, optionally, from about 0.4% to about 30%, by weight, of the wet film composition.
• Suitable water soluble cationic polymers are, for example, cationic cellulose derivatives such as, for example, the quaternized hydroxyethyl cellulose obtainable from Amerchol under the name of Polymer JR 400®; catiomic starch; copolymers of diallyl ammonium salts and acrylamides; quaternized vinyl pyrrolidone/vinyl imidazole polymers such as, for example, Luviquat®, (BASF); condensation products of polyglycols and amines; quaternized collagen polypeptid.es such as, for example, lauryldimonium hydroxypropyl hydrolyzed collagen (Lamequat® L, Grunau GmbH); quaternized wheat polypeptides; polyethyleneimine; cationic silicone polymers such as, for example, Amidomethicone; copolymers of adipic acid and dimethylaminohydroxypropyl diethylenetriamine (Carta-retine® Sandoz AG
• ionene polymers useful herein include, but are not limited to, those set forth in U.S. patents 5,681,862 and 5,575,993, both of which are incorporated by reference in their entirety. Further, the polymers set forth in U.S. patent 5,256,252 can also be used herein and is incorporated herein by reference in its entirety.
• the cationic water soluble polymer includes, but is not limited to, chitosan (supplied as Protasan UP CL213, FMC Biopolymer, Philadelphia, PA.), polyquaternium-10, polyquatemium-11 (ISP, Wayne, NJ)., polyqaatemium-16 (BASF, Mount Olive, NJ), polyquaternium-24 (Amerchol, Edison, NJ), polyquaternium-28 (ISP, Wayne, NJ)., polyquatemium-44 (BASF, Mount Olive, NJ), polyquaternium-46 (BASF, Mount Olive, NJ), polyvinylpyrrolidone/dimethylaminopropyl methacrylamide copolymer (JSP, Wayne, NJ)., and the mixtures thereof.
• the cationic water soluble polymer When incorporated in the film compositions of the present in-.vention, the cationic water soluble polymer is present at a concentration of from about 0.01% to about 50% optionally, from about 0.1% to about 40%, and, optionally., from about 0.4% to about 30%, by weight, of the wet film composition.
• the ratio of the anionic water-soluble polymer to the cationic water-soluble polymer is from about 20:1 to about 1 :20, optionally, from about 5:1 to about 1:5 and, optionally, from about 2:1 to about 1:2.
• the Polyvalent Cationic Ion Source Incorporated in certain embodiments of the compositions of the present invention is a polyvalent cationic ion source or salt for providing catior-iic ions of at least two positive charges such as alkaline-earth metals, transition metals , or mixtures thereof.
• Useful polyvalent cationic ion sources include, but are not limited to, water soluble salts such as aluminum salts, chromium salts, calcium salts, zinc salts, magnesium salts, iron salts, barium salts, manganese salts, stannous salts and the mixtures thereof.
• Specific water soluble salts include, but are not limited., to, stannous chloride, manganese chloride, calcium chloride, magnesium chloride, calcium nitrate, magnesium nitrate, and mixtures thereof.
• the cationic ion source is present at a concentration of from about 0.001% to about 10% optionally, from about 0.01% to about 5%, and, optionally, from about 0.02% to about 2%, by weight, of the wet film composition.
• Water soluble salts Incorporated in certain embodiments of the compositions of the present invention are water soluble salts such as sodium chloride, potassium chloride, magnesium chloride, calcium chloride, zinc chloride, sodium acetate, sodium fluoride, sodium phosphate, potassium phosphate, sodium citrate, sodium oxalate, acidic salts thereof, and mixtures thereof.
• the water soluble salt is present at a concentration of from about 0.001%> to about 10% optionally, from about 0.01% to about 5%, and, optionally, from about 0.02%> to about 2%, by weight, of the wet film composition.
• Anionic surfactants useful herein include, but are not limited to, the water- soluble salts of alkyl sulfates having from 8 to 20 carbon atoms in the alkyl radical (e.g., sodium alkyl sulfate) and the water-soluble salts of sulfonated monoglycerides of fatty acids having from 8 to 20 carbon atoms.
• Sodium lauryl sulfate (Rhodia Inc, Cranbury, NJ) and sodium coconut monoglyceride sulfonates are examples of anionic surfactants of this type.
• anionic surfactants are sarcosinates, such as sodium lauryl sarcosinate, taurates such as sodium cocoyl taurates, sodium lauryl sulfoacetate, sodium lauroyl isethionate, sodium laureth carboxylate, and sodium dodecyl benzenesulfonate (Witco, Houston, TX). Mixtures of anionic surfactants can also be employed. Many suitable anionic surfactants are disclosed in U.S. patent 3,959, 458, to Agricola, et al., incorporated by reference herein in its entirety by reference.
• the anionic surfactants include, but are not limited to, sodium lauryl sulfate, sodium dodecyl benzenesulfonate, sodium C12-15 pareth-15 sulfonate (BASF, Mount Olive, NJ)., sodium methyl cocoyl taurate (Croda, Parsippany, NJ), disodium lauryl sulfosuccinate (Mclntire Group, University Park, IL), and the mixtures thereof.
• the anionic surfactant is present at a concentration of from about 0.001% to about 10%, optionally, from about 0.005% to about 5%, and, optionally, from about 0.01% to about 2%o, by weight, of the wet film composition.
• Cationic surfactants useful as cationic sources include, but not limited quaternary ammonium compounds such as cetyl pyridinium chloride, benzalkonium chloride, benzethonium chloride, cetrimonium bromide, stearyl dimethylbenzyl ammonium chloride, dodecyl trimethylammonium chloride, polyoxyethylene and coconut amine and mixtures thereof.
• the cationic surfactant includes, but is not limited to, cetyl pyridinium chloride (Spectrum Laboratory Products ,Gardena, CA.), benzalkonium chloride (Lonza, Fairlawn, NJ), dodecyl trimethylammonium chloride (Mallinckrodt Baker, Philipsburg, NJ), and the mixtures thereof.
• the cationic surfactant is present at a concentration of from about 0.001% to about 10%, optionally, from about 0.005% to about 5%, and, optionally, from about 0.01% to about 2%, by weight, of the wet film composition.
• the multilayer films can be prepared accordingly.
• a polymer solution containing a neutral or nonionic polymer, an anionic or a cationic surfactant and desired active ingredients (where appropriate, together with auxiliaries) is produced.
• This solution is coated onto an inert processing sheet made of plastic or metal by knife or roller application or spraying processes. Drying subsequently results in an initial film, also called the basic layer.
• a second polymer solution containing a neutral or nonionic polymer, a water soluble salt and desired active ingredients (where appropriate, together with auxiliaries) is produced.
• the second polymer solution is cast over the basic layer and allowed to dry, resulting in a tri-layer composite.
• an interface or intennediate complex layer is formed between the combined water soluble layers such that the complex layer is less soluble than the individual layers which are combined to form the interface or intermediate complex layer, resulting in the overall decreased solubility and corresponding increased retention time of the multilayer film. It is further believed, without being limited by theory, that the interface or intermediate complex layer results from the interaction between the charged entities provided by each layer and, optionally, the hydrophobic interactions provided by the surfactant and/or polymer molecules.
• Thicknesses of the layers being combined are additional parameters that can be used to manipulate the dissolution rate of resulting film.
• one or more subsequent polymer solution layers can be applied to one or the other of this tri-layer composite.
• the third layer added in this case can have either the same composition as the second, so that a symmetrical structure results, or a different one.
• a polymer solution containing an anionic or cationic polymer and desired active ingredients is produced. This solution is coated onto an inert processing sheet made of plastic or metal by knife or roller application or spraying processes. Drying subsequently results in an initial film, also called the basic layer.
• a second polymer solution containing a polymer having a charge opposite the polymer in the basic layer (or a neutrally charged polymer in admixture with a cationic or anionic surfactant or a polyvalent ion source having a charge opposite the charge of the polymer in the basic layer) and desired active ingredients (where appropriate, together with auxiliaries) is produced.
• the second polymer solution is cast over the basic layer and allowed to dry, resulting in a tri-layer composite.
• water soluble layers containing cationic water soluble polymers can, likewise, be added to water soluble layers formed from a neutrally charged water soluble polymer in admixture with an anionic surfactant.
• water soluble layers containing anionic water soluble polymers can, likewise, be added to water soluble layers formed from a neutrally charged water soluble polymer in admixture with a cationic surfactant or a polyvalent cationic ion source.
• the drying step can be accomplished at room temperature or by heating.
• the concentrations and ratios of water soluble neutral, cationic or anionic polymers, salt(s), and surfactant(s) the dissolution rates of the bi- or multi-layer films can be adjusted faster or slower. Thicknesses of the layers being combined are additional parameters that can be used to manipulate the dissolution rate of resulting film. Additional layers can added as taught above.
• the processes according to the invention can be carried out both continuously and batchwise.
• the inert substrates used for continuous processes are preferably processing sheets or metal sheets or strips, whereas in batchwise processes it is possible in principle to use any inert substrates.
• the film layers of the present application are manufactured using conventional film making technologies such as that disclosed in US patents 6,596,298 to Leung et al. and 6,419,903 to Xu et al., both of which are herein incorporated by reference in their entirety. Additionally the film layers of the present invention can be manufactured using hot melt extrusion techniques such as that described in US patent 6,375,963 Bl to Repka et al. herein incorporated by reference in their entirety.
• the thicknesses of the various layers can range from about 30 microns to about 150 microns, optionally from about 45 microns to about 130 microns and optionally from about 70 microns to about 120 microns.
• the first or backing layer can range from about 1 micron to about 20 microns, optionally from about 3 microns to about 15 microns, optionally from about 5 microns to about 12 microns.
• Topical and systemic actives can also be incorporated into the films of the present invention.
• topical or system active includes curative, prophylactic and cosmetic active substances or compositions thereof.
• Examples of the conditions these substances may address include, but are not limited to one or more of, appearance and structural changes to teeth, whitening, stain bleaching, stain removal, plaque removal, tartar removal, cavity prevention and treatment, inflamed and/or bleeding gums, mucosal wounds, lesions, ulcers, aphthous ulcers, cold sores, tooth abscesses, tooth and/or gum pain, tooth sensitivity (e.g. to temperature changes), and the elimination of mouth malodour resulting from the conditions above and other causes such as microbial proliferation.
• the films of the present invention are useful for treating and/or preventing wounds, lesions, ulcers, cold sores and the like of the lips and skin generally.
• Suitable topical actives for use in and around the oral cavity include any substance that is generally considered as safe for use in the oral cavity and that provides a change to the overall health of the oral cavity.
• the level of topical oral care active in the present invention may generally be from about 0.01% to about 40% or, optionally, from about 0.1% to 20% by weight of the wet film.
• the topical oral care actives of the present invention may include many of the actives previously disclosed in the art. The following is a non all- inclusive list of oral care actives that may be used in the present invention.
• Essential oils may be included in or associated with the films the present invention. Essential oils suitable for use herein are described in detail in US patents 6,596,298 to Leung et al., previously incorporated by reference in its entirety.
• Teeth whitening actives may be included in the films of the present invention.
• the actives suitable for whitening are selected from the group consisting of oxalates, peroxides, metal chlorites, perborates, percarbonates, peroxyacids, and mixtures thereof.
• Suitable peroxide compounds include: hydrogen peroxide, calcium peroxide, sodium peroxide, carbamide peroxide, urea peroxide, sodium percarbonate and mixtures thereof.
• the peroxide is hydrogen peroxide.
• Suitable metal chlorites include calcium chlorite, barium chlorite, magnesium chlorite, lithium chlorite, sodium chlorite and potassium chlorite. Additional whitening actives may be hypochlorite and chlorine dioxide.
• a preferred chlorite is sodium chlorite.
• whitening actives can, optionally, be enhanced by means of a catalyst, i.e. a two-component peroxide- catalyst; system.
• a catalyst i.e. a two-component peroxide- catalyst; system.
• Useful whitening agent catalysts or catalytic agents can be found in US 6, 440,396 to McLaughlin, Gerald, herein incorporated by reference in its entirety.
• the film compositions of the present invention can, optionally, contain peroxide active stabilizers.
• Peroxide active stabilizers suitable for use herein include, but are not limited to polyethylene glycols such as PEG 40 or PEG 600; zinc salts such as zinc citrate; polyoxyalkylene block- polymers (e.g., Pluronics); aminocarboxylic acids or salts thereof; glycerols; dyes such as Blue #1 or Green #3; phosphates such as phosphoric acid, sodium phosphate or sodium acid pyrophosphate; stannous salts such as stannous chloride; sodium stannate; citric acid; etidronic acid; carbomers or carboxypolymethylenes such as those of the Carbopol® memorirs, butylated hydroxytoluene (BHT), ethylenediaminetetraacetic acid (EDTA) and mixtures thereof.
• polyethylene glycols such as PEG 40 or PEG 600
• zinc salts such as zinc citrate
• polyoxyalkylene block- polymers e.g., Pluronics
• Anti-tartar agents useful herein include: phosphates.
• Phosphates include pyrophosphates, polyphosphates, polyphosphonates and mixtures thereof.
• Pyrophosphates are among the best known for use in dental care products. Pyrophosphate ions delivered to the teeth derive from pyrophosphate salts.
• the pyrophosphate salts useful in the present compositions include the dialkali metal pyrophosphate salts, tetra-alkali metal pyrophosphate salts, and mixtures thereof.
• Disodium dihydrogen pyrophosphate Na 2 H 2 P 2 O 7
• tetrasodium pyrophosphate Na 4 P 2 O 7
• tetrapotassium pyrophosphate K P 2 0 7
• Anticalculus phosphates include potassium and sodium pyrophosphates; sodium tripolyphosphate; diphosphonates, such as ethane-1-hydroxy- 1,1-diphosphonate; l-azacycloheptane-l,l-diphosphonate; and linear alkyl diphosphonates; linear carboxylic acids and sodium and zinc citrate.
• Agents that may be used in place of or in combination with the pyrophosphate salt include materials such as synthetic anionic polymers including polyacrylates and copolymers of maleic anhydride or acid and methyl vinyl ether (e.g. Gantrez, as described, for example, in U.S. Patent 4,627, 977, to Gaffar et al. herein incorporated by reference in its entirety, as well as e.g. polyamino propane sulfonic acid (AMPS), zinc citrate trihydrate, polyphosphates (e.g. tripolyphosphate; hexametaphosphate), diphosphonates (e.g. EHDP, AMP), polypeptides (such as polyaspartic and polyglutamic acids), and mixtures thereof.
• synthetic anionic polymers including polyacrylates and copolymers of maleic anhydride or acid and methyl vinyl ether
• AMPS polyamino propane sulfonic acid
• zinc citrate trihydrate polyphosphates (e.g.
• fluoride ion sources incorporated into the film compositions as anticaries agents. Fluoride ions are included in many oral care compositions for this purpose, and similarly may be incorporated in the invention in the same way. Detailed examples of such fluoride ion sources can be found in US patent 6,121,315 to Nair et al, herein incorporated by reference in its entirety. Also useful herein are tooth desensitizing agents. Tooth desensitizing agents that may be used in the present invention include potassium nitrate, citric acid, citric acid salts, strontium chloride, and the like, as well as other desensitizing agents known in the art.
• the amount of desensitizing agent included within the dental whitening compositions of the present invention may vary according to the concentration of the potassium nitrates, the desired strength and intended treatment times. Accordingly, if included at all, the other desensitizing agents will preferably be included in an amount in a range from about 0.1 % to about 10% by weight of the dental desensitizing composition, more preferably in a range from about 1 to about 7% > by weight of the wet film composition.
• Antimicrobial agents can also be present in the film compositions of the present invention as oral agents or topical skin and/or systemic actives.
• Such agents may include, but are not limited to, 5-chloro-2-(2,4-dichlorophenoxy)- phenol, commonly referred to as triclosan, chlorhexidine, alexidine, hexetidine, sanguinarine, benzalkonium chloride, salicylamide, domiphen bromide, cetylpyridium chloride (CPC), tetradecyl pyridinium chloride (TPC); N-tetradecyl-4- ethyl pyridinium chloride (TDEPC); octenidine; delmopinol, octapinol, and other piperidino derivatives, niacin preparations; zinc/stannous ion agents; antibiotics such as AUGMENTIN, amoxyicillin, tetracycline, doxycyline, minocycline, and metronidazole; and analogs, derivatives and salts of the above antimicrobial agents and mixtures thereof.
• triclosan chlor
• Anti-inflammatory agents can also be present in the film compositions of the present invention as oral agents or topical skin and/or systemic actives.
• Such agents may include, but are not limited to, non- steroidal anti-inflammatory agents or NSAIDs, such as propionic acid derivatives; acetic acid derivatives; fenamic acid derivatives; biphenylcarboxylic acid derivatives; and oxicams. All of these NSAIDS are fully described in U.S. Pat. No. 4,985,459 to Sunshine et al., issued Jan. 15, 1991, incorporated by reference herein in its entirety.
• NSAIDS examples include acetyl salicylic acid, ibuprofen, naproxen, benoxaprofen, flurbiprofen, fenoprofen, fenbufen, ketoprofen, indoprofen, pirprofen, carprofen, oxaprozin, pranoprofen, microprofen, tioxaprofen, suprofen, alminoprofen, tiaprofenic acid, fluprofen, bucloxic acid and mixtures thereof.
• steroidal anti-inflammatory drugs such as hydrocortisone and the like, and COX-2 inhibitors such as such as meloxicam, celecoxib, rofecoxib, valdecoxib, etoricoxib or mixtures thereof. Mixtures of any of the above antiinflammatories may be used. Anesthetic agent may also be incorporated herein.
• Suitable anesthetic agents include, but are not limited to, benzocaine, betoxycaine, biphenamine, bupivacaine, butacaine, dibucaine hydrochloride, dyclonine, lidocaine, mepivacaine, procaine, propanidid, propanocaine, proparacaine, propipocaine, propofol, propoxycaine hydrochloride, pseudococaine, tetracaine hydrochloride and mixtures thereof.
• Upper respiratory actives can also be used herein.
• Such actives are sympathomimetic agents administered systemically or topically for decongestant use, including propylhexedrine, phenylephrine, phenylpropanolamine, pseudoephedrine, naphazoline hydrochloride, oxymetazoline hydrochloride, tetrahydrozoline hydrochloride, xylometazoline hydrochloride, and ethylnorepinephrine hydrochloride; anti-histamines are chlorpheniramine, brompheniramine, clemastine, ketotifen, azatadine, loratadine, terfenadine, cetirizine, astemizole, tazifylline, levocabastine, diphenhydramine, warmthlastine, etolotifen, acrivastine, azelastine, ebastine, mequitazine, mizolastine, levocetirizine, mometas
• Gastro-intestinal actives can also be incorporated.
• suitable gastrointestinal actives include anticholinergics, including: atropine, clidinium and dicyclomine; antacids, including aluminum hydroxide, basic bismuth salts such as bismuth subsalicylate, bismuth ranitidine citrate, bismuth subcitrate, bismuth subnitrate, aluminum or bismuth salts of polysulfated saccharides such as aluminum sucrose octasulfate or bismuth sucrose octasulfate, simethicone, calcium carbonate and magaldrate (other examples of antacids can be found in 21CFR 331.11 which is incorporated herein by reference); H (2)-receptor antagonists, including cimetidine, famotidine, nizatidine and ranitidine; laxatives, including: bisacodyl, picosulfate, and casanthrol (other examples of laxatives can be found in the
• gastroprotectants including sucralfate and sucralfate humid gel
• gastrokinetic and prokinetic agents including cisapride, metoclopramide and eisaprode
• proton pump inhibitors including omeprazole, lanzoprazole, and antidiarrheals including: diphenoxylate and loperamide
• agents which are bacteriostatic or bactericidal to the ulcer-inducing organism Heliobacter pylori such as amoxicillin, metronidazole, erythromycin, or nitrofurantoin and others agents for treating H. pylori disclosed in U.S. Pat. No.
• polyanionic materials useful for the treatment of ulcers and other gastrointestinal disorders including amylopectin, carragemum, sulfated dextrins, inositol hexaphosphate, or other similar agents and mixtures thereof.
• Nutrients may improve the condition of the oral cavity and can be included in the oral care substances or compositions of the present invention. Examples of nutrients include minerals, vitamins, oral nutritional supplements, enteral nutritional supplements, and mixtures thereof.
• Smoking cessation agents such as nicotine may also be incorporated in the film compositions of the present invention.
• An individual enzyme or combination of several compatible enzymes can also be included in the oral care substance or composition of the present invention.
• Enzymes are biological catalysts of chemical reactions in living devices. Enzymes combine with the substrates on which they act forming an intermediate enzyme substrate complex. This complex is then converted to a reaction product and a liberated enzyme which continues its specific enzymatic function. Enzymes provide several benefits when used for cleansing of the oral cavity. Proteases break down salivary proteins which are absorbed onto the tooth surface and form the pellicle; the first layer of resulting plaque. Proteases along with lipases destroy bacteria by lysing proteins and lipids which form the structural component of bacterial cell walls and membranes. Dextranases break down the organic skeletal structure produced by bacteria that forms a matrix for bacterial adhesion.
• proteases and amylases not only present plaque formation, but also prevent the development of calculus by breaking-up the carbohydrate protein complex that binds calcium, preventing mineralisation.
• Enzymes useful in the present invention include any of the commercially available proteases, glucanohydrolases, endoglycosidases, amylases, mutanases, lipases and mucinases or compatible mixtures thereof.
• Preferred are the proteases, dextranases, endoglycosidases and mutenases, most preferred being papain, endoglycidase, lysozyme, or a mixture of dextranase and mutanase.
• compositions such as those of the present invention.
• Antioxidants that may be included in the oral care composition or substance of the present invention include, but are not limited to Vitamin E, ascorbic acid, Uric acid, carotenoids, Vitamin A, flavonoids and polyphenols, herbal antioxidants, melatonin, aminoindoles, lipoic acids and mixtures thereof.
• Histamine-(H-2)receptor antagonist compounds H-2 antagonists may be used in the oral care composition of the present invention.
• selective H-2 antagonists are compounds that block H-2 receptors, but do not have meaningful activity in blocking histamine-(H-l) receptors. Additional useful actives can be found in US patent 6,638,528 herein incorporated by reference in its entirety.
• An additional carrier material may also be added to the film composition of the present invention. These materials can be added as additional components for properties other than those previously mentioned and can include humectants and include glycerin, sorbitol, polyethylene glycol and the like.
• the film composition may comprise the active substance itself, together with one or more active substance enhancers, for example catalysts and/or potentiators to modify the release and/or activity of the active substance.
• the film compositions of the invention may additionally comprise additional substances such as flavors, colors, etc.
• the topical or system active is preferably teeth whitening substance.
• the teeth whitening substance can take the form of a peroxide-containing gel.
• Suitable gels may be based on glycerol containing a peroxide such as hydrogen peroxide or an organic peroxide.
• a suitable gel is that disclosed in US-A-3,657,413, for example that sold under the trade mark PROXIGEL by The Block Drug Company (USA) (since acquired by GlaxoSmithKline pic).
• Other suitable peroxide-containing gels are for example disclosed in the art references cited above.
• the film may have the topical or system active deposited upon its surface.
• a pH adjusting agent may also be added to optimize the storage stability of the gel and to make the substance safe for the oral tissues.
• These pH adjusting agents, or buffers can be any material which is suitable to adjust the pH of the oral care substance. Suitable materials include sodium bicarbonate, sodium phosphate, sodium hydroxide, arnmonium hydroxide, sodium stannate, triethanolamine, citric acid, hydrochloric acid, sodium citrate, and combinations thereof.
• the pH adjusting agents are added in sufficient amounts so as to adjust the pH of the substance or composition to a suitable value, e.g. about 4.5 to about 11, preferably from about 5.5 to about 8.5, and more preferably from about 6 to about 7.
• the pH adjusting agents are generally present in an amount of from about 0.01%> to about 15% and preferably from about 0.05% to about 5%, by weight of the oral care substance.
• a gel may be deposited directly as a layer on a surface of a film layer as described above.
• a gel may be absorbed into the above- described film layer, or impregnated into the bulk of the film material, or deposited between layers of a multiple layered film.
• Methods of depositing substances upon the surfaces of film materials as described above are known, for example printing, e.g. silo screen printing, passing between impregnated rollers, dosing, a pump and nozzle, spraying, dipping etc.
• the film material may be a foam material, particularly an open-cell foam material, and the substance may be impregnated into the strip material by introducing the substance into the cells of the foam.
• the device of the invention may be marked with one or more visible symbol, e.g. text matter, a trade mark, a company logo, an area of color, or an alignment feature such as a visible line or notch etc. to assist the user in applying the device to the teeth in a proper alignment.
• Such an alignment feature may for example comprise a symbol to show the user which way up the device should be whilst applying the device to the teeth, or which of a pair of the devices is intended for the upper teeth and which for the lower teeth. This way the device may be made more visually attractive and/or easier to use.
• symbol(s) may be applied by conventional printing processes, e.g. silk screen printing, inkjet printing etc. to the surface of the plastically deformable material opposite to the surface on which is attached the layer of an absorbent material. If such a visible symbol is applied to this surface, a cover layer can, optionally, be applied over the symbol, for example to protect it. This cover layer may be transparent or translucent to allow visible symbols to be seen through this layer.
• a cover layer can, optionally, be applied to the film by pressing, e.g. rolling, the material of the cover layer in contact with the film.
• the present invention can be used where retention of the topical or systemic active is required for topical activity or adequate systemic absorption.
• the film compositions of the present invention are particularly useful for whitening tooth surfaces.
• the delivery of the teeth whitening actives involves topically applying the inventive film containing a safe and effective amount of such actives to a tooth or teeth and gums in a manner described in US patents 5,894,017; 5,891,453; 6,045,811; and 6,419,906, each of which is herein incorporated by reference in its entirety.
• the films of the present invention can be useful for problem skin areas needing more intensive treatment or for the transdermal delivery of drugs.
• the patch can be occlusive, semi-occlusive or non- occlusive.
• the topical or systemic actives of the present invention can be contained within or coated on the surface of the film or be applied to the skin prior to application of the film.
• the film can also include actives such as chemical initiators for exothennic reactions such as those described in PCT application WO 9701313 to Burkett et al.
• the film can be applied at night as a form of night therapy.
• transdermal systems are described in U.S. Patents 3,598,122 3,598,123; 3,731,683; 3,797,494; 4,286,592; 4,314,557; 4,379,454; 4,435,180: 4,559,222; 4,568,343; 4,573,999; 4,588,580; 4,645,502; 4,704,282; 4,816,258 4,849,226; 4,908,027; 4,943,435; and 5,004,610, all of which are herein incorporated by reference in their entirety.
• Actives commonly associated with transdermal delivery are disclosed in U.S. Patents 5,843,468 and 5,853,751, both of which are herein incorporated by reference in their entirety.
• film compositions illustrated in following examples illustrate specific embodiments of the film compositions of the present invention, but are not intended to be limiting thereof. Other modifications can be undertaken by the skilled artisan without departing from the spirit and scope of this invention. All exemplified film compositions can be prepared by conventional formulation and mixing techniques. Component amounts are listed as weight percents and exclude minor materials such as diluents, filler, and so forth. The listed formulations, therefore, comprise the listed components and any minor materials associated with such components.
• a suitable container water, calcium chloride and hydroxyethyl cellulosde are mixed until a homogeneous solution is formed.
• a separate container water, povidone, and alginate are mixed until dissolved and uniform.
• container A is then cast at desired thickness on a non-stick surface at room temperature to form the first layer of the inventive multi-layer film.
• the cast layer can optionally be dried under warm air flow.
• the contents of container B is then cast at desired thickness over the above described first layer at room temperature to form the second layer of the multi-layer film.
• the cast layer can optionally be dried under warm air flow.
• container A is then cast at desired thickness on a non-stick surface at room temperature to form the first layer of the inventive multi-layer, anesthetic film.
• the cast layer can optionally be dried under warm air flow.
• the contents of container B is then cast at desired thickness over the above described first layer at room temperature to form the second layer of the multi-layer, anesthetic film.
• the cast layer can optionally be dried under warm air flow.
• a suitable container water, sodium lauryl sulfate, and hydroxypropyl methylcellulosde are mixed until a homogeneous solution is fonned.
• a separate container water, Povidone, sodium phosphate dibasic, glycerin, and hydrogen peroxide are mixed until dissolved and uniform.
• container A is then cast at desired thickness on a non-stick surface at room temperature to form the first layer of the inventive multi-layer, teeth whitening film.
• the cast layer can optionally be dried under warm air flow.
• the contents of container B is then cast at desired thickness over the above described first layer at room temperature to form the second layer of the multi-layer, teeth whitening film.
• the cast layer can optionally be dried under warm air flow.
• container B is then cast at desired thickness over the above described first layer at room temperature to form the second layer of the multi-layer, teeth whitening film.
• the cast layer can optionally be dried under warm air flow.
• a separate container water and Carboxymethyl Cellulose are mixed until dissolved and uniform.
• the contents of container A is then cast at desired thickness on a non-stick surface at room temperature to form the first layer of the inventive multi-layer film.
• the cast layer can optionally be dried under warm air flow.
• the contents of container B is then cast at desired thickness over the above described first layer at room temperature to form the second layer of the multi-layer, teeth whitening film.
• the cast layer can optionally be dried under warm air flow.

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• 2005
  • 2005-02-21 CA CA002557783A patent/CA2557783A1/en not_active Abandoned
  • 2005-02-21 WO PCT/IB2005/000449 patent/WO2005092271A1/en active Application Filing
  • 2005-02-21 BR BRPI0508359-1A patent/BRPI0508359A/pt not_active IP Right Cessation
  • 2005-02-21 EP EP05708573A patent/EP1737416A1/en not_active Withdrawn
  • 2005-02-21 KR KR1020067017742A patent/KR20060115766A/ko not_active Application Discontinuation
  • 2005-02-21 AU AU2005225219A patent/AU2005225219A1/en not_active Abandoned
  • 2005-02-21 JP JP2007501364A patent/JP2007526294A/ja active Pending
  • 2005-03-02 AR ARP050100787A patent/AR047986A1/es not_active Application Discontinuation
• 2006
  • 2006-10-02 NO NO20064459A patent/NO20064459L/no unknown

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