JP2012232937A - Composition for oral cavity - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a technique capable of remarkably controlling hyperesthesia and remarkably preventing dentinal caries including root surface caries.SOLUTION: Provided is the composition for oral cavity that contains: (A) milk serum and/or lactoferrin; (B) a fluorine compound; and (C) at least one salt chosen from a group of potassium salts and sodium salts of the acid chosen from nitric acid, hydrochloric acid, and phosphoric acid. Also, provided is the use of the composition for oral cavity.

Description

  The present invention relates to an oral composition.

  Hypersensitivity (dentin hypersensitivity) is the loss of dental enamel or cement, exposing dentin, and exposing exposed dentin to thermal, chemical, or mechanical external stimuli. It is a temporary, very unpleasant pain. The cause of pain is thought to be that external stimuli are transmitted to nerves through dentinal tubules.

  As a technique relating to suppression of hypersensitivity by oral hygiene products such as dentifrices, a method of blocking dentinal tubules and a method of blunting nerves are known.

  As a method for sealing the dentinal tubule, for example, a method using aluminum lactate is known. Aluminum lactate has the effect of closing the opening of the dentinal tubule and has the effect of converging gingiva (Patent Documents 1 and 2; JP-A-7-291844 and JP-A-2003-26556).

  As a method for dulling nerves, a method using a potassium salt such as potassium nitrate is known (Patent Document 3; JP-A-2003-73246, Patent Document 4: JP-T-2004-506663).

  Dentin caries develops when dentin is exposed after enamel collapses due to enamel caries. In addition, gingival recession occurs due to periodontal disease, aging, and the like, and the tooth root portion is exposed, and the onset occurs. Dentin is considered to be physically and chemically weaker than enamel because it has a tubule structure and collagen in the tooth, and says that drugs such as fluorine are less effective than enamel. It has been broken. Therefore, it is often difficult to prevent dentin caries compared to normal caries (caries with enamel). In addition, the usual caries prevention methods may not be effective enough to prevent dentin caries.

  Dentin caries that develops in the exposed root is called root caries. Root caries is caused by acids or enzymes in plaque that accumulate in the gap between the teeth and gums. Root caries progress rapidly without being noticed. It often occurs in places that are less painful and difficult to find. Therefore, when it is noticed, it has already progressed severely, and it is difficult to treat and the possibility of tooth extraction is high. From these points, root caries are often treated separately from normal dentin caries that develops in the crown and the like. In particular, recently, there is a need for root caries that is different from normal caries, that is, reliable preventive measures for root caries.

  As a usual means for preventing dentin caries, a technique for encouraging tooth protection and a technique for strengthening the tooth itself have been proposed.

  Examples of the technology for protecting tooth properties include natural or synthetic cationized peptides or proteins, at least one surfactant selected from nonionic surfactants and amphoteric surfactants, and an anion containing fluoride. For improving the amount of fluorine taken into the tooth surface by the oral surfactant-free composition (Patent Document 5: Japanese Patent Laid-Open No. 6-9354), living tissue by the oral preparation containing collagen or gelatin (Patent Document 6: Japanese Patent Laid-Open No. 2003-119157), technology related to prevention of plaque formation by a tooth surface coating agent containing a fatty acid salt (Patent Document 7: Japanese Patent Laid-Open No. 2000-103726) Is mentioned.

  As a technique for strengthening the tooth itself, for example, a technique for improving acid resistance of tooth enamel and dentin by using a fossilized seaweed containing a fluorine compound and a tooth strengthening agent containing acid and xylitol as active ingredients (Patent Document 8: JP, 2008-127304, A), technology related to dental caries prevention by low caries nutrition composition containing two or more components selected from the group consisting of lactoferrin, lactoperoxidase, tea polyphenol, or fluorine (Patent Document 9) : JP-A-9-107917).

JP-A-7-291844 JP 2003-26556 A JP 2003-73246 A Japanese translation of PCT publication No. 2004-506663 JP-A-6-9354 JP 2003-119157 A JP 2000-103726 A JP 2008-127304 A Japanese Patent Laid-Open No. 9-107917

  However, all of the above-described known techniques relating to suppression of hypersensitivity have the following problems.

  In order to sufficiently seal the dentinal tubules with the oral composition containing aluminum lactate, it is necessary to make the blending amount on the order of several percent. As a result, there is a possibility that problems such as the peculiarity of aluminum lactate, the appearance of a metallic taste, and the deterioration of the stability of the composition may occur. Moreover, although the nerve dulling action of potassium nitrate has an immediate effect, there are problems such as strong bitterness and uncomfortable use, and low sustained effect.

  There has been a long-awaited need for a new technology that can solve the problems of the conventional technology and can dramatically improve the effect of suppressing hypersensitivity.

  On the other hand, all of the above-mentioned known techniques relating to the protection of the tooth and the strengthening of the tooth itself have the following problems.

  The problems of the dental protection technology are as follows. The composition for oral cavity of patent document 5 requires a long time for tooth surface uptake | capture of a fluorine. The technique of Patent Document 6 has a low adsorbability for type I collagen contained in dentin, and thus may not be able to sufficiently protect dentin. In the technique of Patent Document 7, since the fatty acid salt has a surface-active action, when the tooth surface coating agent is gargled after treatment, the fatty acid salt tends to flow out of the oral cavity and the tooth surface retention tends to be insufficient.

  The technical problems related to the enhancement of tooth quality are as follows. The tooth enhancer of Patent Document 8 has doubts about its effectiveness for root caries. In the technique of Patent Document 9, since it is not a composition for oral cavity but a food composition, and it is for infants, the suspicion cannot be dispelled for its effectiveness against dentin caries, especially root caries.

  There is a long-awaited new technology that eliminates the problems of the conventional technology and dramatically improves the preventive effect of dentine caries, especially the root caries. It was.

  The present invention has been made in view of the above, and provides a technique capable of remarkably suppressing hypersensitivity and remarkably preventing dentin caries including root caries. For the purpose.

  The present inventors made extensive studies. As a result, the composition containing whey or lactoferrin, a fluorine compound, and a specific acid salt stably retains a soluble fluorine compound, and can block dentinal tubules and significantly suppress hypersensitivity. I found it. Moreover, while confirming that this composition accelerates | stimulates calcification and improves the acid resistance and hardness of dentine drastically, it discovered that it was excellent also in the usability | use_condition. The present invention is based on such knowledge.

The present invention provides the following [1] to [8].
[1] (A): Whey and / or lactoferrin, (B): Fluorine compound, and (C): From the group consisting of potassium salt and sodium salt of an acid selected from nitric acid, hydrochloric acid, phosphoric acid and sulfuric acid An oral composition containing at least one selected salt.
[2] The composition for oral cavity according to the above [1], wherein the mass ratio of (A) to (C): ((A) / (C)) is 0.01 to 3.
[3] The composition for oral cavity according to [1] or [2] above, wherein (C) is at least one selected from potassium nitrate, sodium nitrate, sodium chloride and potassium chloride.
[4] The composition for oral cavity according to any one of the above [1] to [3], which is a dentifrice composition or a mouthwash composition.
[5] (A): whey and / or lactoferrin, (B): fluorine compound, and (C): at least one selected from the group consisting of potassium and sodium salts of nitric acid, hydrochloric acid, phosphoric acid and sulfuric acid A composition for suppressing hypersensitivity, comprising:
[6] A fluorine compound containing (A): whey and / or lactoferrin, and (C): at least one selected from the group consisting of potassium salt and sodium salt of nitric acid, hydrochloric acid, phosphoric acid and sulfuric acid. A composition for improving the stability of a soluble fluorine compound for an oral composition containing the composition.
[7] (A): whey and / or lactoferrin, (B): fluorine compound, and (C): at least one selected from the group consisting of potassium salt and sodium salt of nitric acid, hydrochloric acid, phosphoric acid and sulfuric acid Containing dentin hardness improving composition.
[8] (A): whey and / or lactoferrin, (B): fluorine compound, and (C): at least one selected from the group consisting of potassium and sodium salts of nitric acid, hydrochloric acid, phosphoric acid and sulfuric acid A composition for improving acid resistance of dentin.

  The composition for oral cavity of the present invention can stably hold a soluble fluorine compound, can seal dentinal tubules, promotes calcification, and dramatically improves the acid resistance and hardness of dentin. Can be improved. Therefore, the composition of the present invention can remarkably prevent dentin caries including root caries while suppressing hypersensitivity. Since the composition of the present invention is excellent in usability, it is useful as various oral compositions such as a dentifrice composition and a mouthwash composition.

  The composition for oral cavity of the present invention comprises (A): whey and / or lactoferrin, (B): fluorine compound, and (C): potassium salt and sodium of an acid selected from nitric acid, hydrochloric acid, phosphoric acid and sulfuric acid. It contains at least one salt selected from the group consisting of salts.

  (A) may be whey only, lactoferrin only, or a combination of whey and lactoferrin.

  Whey and lactoferrin are generally known as milk products. Milk typically contains about 3.3% protein by weight, of which about 80% is casein and the remaining about 20% is whey. Whey is the supernatant portion that is separated when producing cheese or yogurt. Whey is mostly water but contains about 1% by weight protein (whey protein). About 40% by mass of whey protein is β-lactoglobulin, about 20% by mass is α-lactalbumin, about 6% by mass is lactoferrin, and also contains serum albumin, immunoglobulin and the like.

  Although there is no restriction | limiting in particular in the manufacturing method of whey, Usually, as mentioned above, the supernatant at the time of manufacturing cheese and yogurt is isolate | separated, and it manufactures through purification processes, such as desalting, deodorizing, and decoloring. A commercial product may be used as the whey. Examples of commercially available products include liquid raw materials (for example, FM extract and FM extract LA (both manufactured by Ichimaru Falcos Co., Ltd.)), and raw materials obtained by concentrating liquid into powder (whey powder, whey powder DX (both Morinaga Milk Industry Co., Ltd.)).

  Although there is no restriction | limiting in particular in the manufacturing method of lactoferrin, Usually, it manufactures by isolate | separating and further refine | purifying the fraction containing lactoferrin from skim milk or whey. For example, after contacting the ion exchange resin with skim milk or whey, the components not adsorbed on the ion exchange resin are removed by washing with water, and lactoperoxidase is eluted with a low concentration salt solution, followed by high concentration. The method of eluting and recovering lactoferrin with a salt solution of Further, the collected lactoferrin may be concentrated, dried, powdered or the like as necessary. A commercially available product may be used as lactoferrin. Examples of commercially available products include powdered raw materials (for example, MLF-1, MLF-EX (both manufactured by Morinaga Milk Industry Co., Ltd.)), liquid raw materials (for example, lactoferrin S, lactoferrin SL (both are Ichimaru Falcos) Manufactured)) and the like.

  The lower limit of the blending amount of (A) in the oral composition of the present invention is preferably 0.005% by mass or more as the solid content of the entire composition (evaporation residue after drying (eg, 105 ° C., 6 hours)). More preferably, the content is 0.01% by mass or more. By being 0.005 mass% or more, a remarkable effect is acquired in suppression of hypersensitivity, improvement in acid resistance of dentin, improvement in dentin hardness, and improvement in feeling of use. The upper limit of the amount is preferably 10% by mass or less, more preferably 3% by mass or less. By being 10% by mass or less, the stability of the soluble fluorine compound is maintained in an amount commensurate with the addition amount, and it is remarkable in suppressing hypersensitivity, improving the acid resistance of dentin, and improving the hardness of dentin An effect is acquired and a usability | use_condition can be hold | maintained more favorably. The blending amount of (A) is preferably 0.005 to 10% by mass, more preferably 0.01 to 3% by mass.

  In (B), the fluorine compound means fluoride or fluoride salt. Examples thereof include sodium fluoride, sodium monofluorophosphate, tin fluoride and the like. Sodium fluoride and sodium monofluorophosphate are preferred. (B) The fluorine compound may be a single fluorine compound or a combination of two or more fluorine compounds. (B) The fluorine compound exhibits effectiveness (mainly caries prevention) as a soluble fluorine compound in the composition of the present invention, that is, in a state where it is not bonded to other components.

  The lower limit of the blending amount of the (B) fluorine compound in the oral composition of the present invention is preferably 100 ppm or more, more preferably 500 ppm or more of the whole composition as fluorine atoms. By being 100 ppm or more, the dentinal tubule is blocked and the acid resistance of the dentin is remarkably improved, and hypersensitivity can be remarkably suppressed. The upper limit of the amount is preferably 2000 ppm or less, more preferably 1500 ppm or less. By being 2000 ppm or less, the stability of a soluble fluorine compound and a favorable feeling of use can be maintained. (B) The compounding quantity of a component becomes like this. Preferably it is 100-2000 ppm, More preferably, it is 500-1500 ppm.

  (C) at least one salt selected from the group consisting of a potassium salt and a sodium salt of an acid selected from nitric acid, hydrochloric acid, phosphoric acid and sulfuric acid is a potassium salt of nitric acid, a sodium salt of nitric acid, and a potassium salt of hydrochloric acid A sodium salt of hydrochloric acid, a potassium salt of phosphoric acid, a sodium salt of phosphoric acid, a potassium salt of sulfuric acid, and a sodium salt of sulfuric acid, or a combination of two or more.

  Examples of (C) include potassium nitrate, potassium chloride, potassium dihydrogen phosphate, potassium sulfate, potassium carbonate, potassium hydrogen carbonate, sodium nitrate, sodium chloride, sodium carbonate, sodium hydrogen carbonate, trisodium phosphate, hydrogen phosphate. Examples include disodium, sodium dihydrogen phosphate, and sodium sulfate. Of these, potassium nitrate, sodium nitrate, sodium chloride, and potassium chloride are preferable from the viewpoints of effectiveness and usability.

The lower limit of the amount of the (C) salt in the oral composition of the present invention is preferably 0.1% by mass or more, more preferably 0.5% by mass or more. When the content is 0.1% by mass or more, remarkable effects can be obtained in the stability of the soluble fluorine compound, the suppression of hypersensitivity, the improvement of acid resistance of the dentin, and the improvement of the hardness of the dentin. The upper limit of the amount is preferably 10% by mass or less, more preferably 7% by mass or less. By being 10 mass% or less, a metal taste and salty taste are suppressed and a usability | use_condition can be kept more favorable. (C) The compounding quantity of a component becomes like this. Preferably it is 0.1-10 mass%, More preferably, it is 0.5-7 mass%. In the present invention, the soluble fluorine compounds in oral compositions, liquid (e.g., water) soluble in the case of become ionic state (sodium fluoride, Na ⁺ and F ^-, the monofluorophosphate In the case of sodium, it means a fluorine compound having the property of monofluorophosphate ion (dissociated into FPO ₃ ²⁻ ) and Na ⁺ ). The soluble fluorine compound can be paraphrased as a fluorine compound which is not bonded to other components and is in a state where it can exhibit a caries prevention effect as fluorine.

  The mass ratio ((A) / (C)) of (A) to (C) is preferably 0.001 or more, more preferably 0.01 or more. When the mass ratio is 0.001 or more, remarkable effects can be obtained in suppression of hypersensitivity, improvement of acid resistance of dentin, and improvement of dentin hardness. The upper limit is preferably 5 or less, more preferably 3 or less. When the mass ratio is 5 or less, a remarkable effect can be obtained in the stability of the soluble fluorine compound. The mass ratio ((A) / (C)) is preferably 0.001 to 5, more preferably 0.01 to 3.

  In the composition for oral cavity of the present invention, an optional component can be blended in addition to the above (A) to (C) within the range not contrary to the object of the present invention. Examples of optional components include surfactants, binders, thickeners, sweeteners, preservatives, abrasives, fragrances, medicinal ingredients, and solvents. As the optional component, one type may be used, or a combination of two or more types may be used. The compounding quantity of this arbitrary component can be adjusted in the range which does not impair the effect of this invention.

  Although the specific example of an arbitrary component is shown below, an arbitrary component is not restrict | limited to these.

  Examples of the surfactant include an anionic surfactant and a nonionic surfactant. One type of surfactant may be used, or a combination of two or more types may be used.

  Examples of the anionic surfactant include N-acyl amino acid salt, α-olefin sulfonate, N-acyl sulfonate, alkyl sulfate, glycerol fatty acid ester sulfate, lauroyl sarcosine sodium, and alkyl chain carbon chain. Examples of the length include sodium α-olefin sulfonate and sodium lauryl sulfate having 10 to 16 carbon atoms. From the viewpoint of versatility, N-acyl amino acid salts, α-olefin sulfonates, alkyl sulfates and the like are preferably used. From the viewpoint of foamability and hard water resistance, sodium lauroyl sarcosine, sodium α-olefin sulfonate having a carbon number of 10 to 16 as the carbon chain length of the alkyl chain, sodium lauryl sulfate and the like are preferably used.

  Nonionic surfactants include, for example, polyoxyethylene alkyl ether, polyoxyethylene-polyoxypropylene block copolymer, polyoxyethylene hydrogenated castor oil, glycerin ester polyoxyethylene ether, sucrose fatty acid ester, alkylol Examples include amides. From the viewpoint of versatility, polyoxyethylene alkyl ether, polyoxyethylene hydrogenated castor oil, alkylolamide, sorbitan fatty acid ester and the like are preferably used. Specifically, the carbon chain length of the alkyl chain is 14 to 18 carbon atoms, polyoxyethylene alkyl ether having an ethylene oxide average addition mole number of 15 to 30, and polyoxyethylene having an ethylene oxide average addition mole number of 40 to 100. Ethylene hardened castor oil, alkylolamide having 12 to 14 carbon atoms as carbon chain length of alkyl chain, sorbitan fatty acid ester having 12 to 18 carbon atoms of fatty acid, ethylene oxide average addition mole with 16 to 18 carbon atoms of fatty acid A polyoxyethylene sorbitan fatty acid ester having a number of 10 to 40 can be used.

  Examples of the binder include pullulan, gelatin, carboxymethylcellulose, hydroxyethylcellulose, hydroxypropylcellulose, hydroxypropylmethylcellulose, xanthan gum, gum arabic, guar gum, locust bean gum, polyvinyl alcohol, polyvinylpyrrolidone, sodium polyacrylate, sodium alginate. Etc. As the binder, one type may be used, or a combination of two or more types may be used. The compounding quantity of a binder is 0.01-2 mass% normally with respect to the whole composition.

  Examples of the thickening agent include propylene glycol, butylene glycol, glycerin, sorbitol, polyethylene glycol, and the like, and usually 1 to 50% by mass can be added to the whole preparation.

  Examples of the sweetening agent include saccharin sodium, stevioside, neohesperidin hydrochalcone, glycyrrhizin, perilartine, p-methoxycinnamamic aldehyde, thaumatin, xylitol, palatinose, maltitol and the like.

  Examples of the preservative include sodium benzoate, paraoxybenzoate ester, methyl paraben, ethyl paraben, butyl paraben, ethylenediamine tetraacetate, benzalkonium chloride and the like.

  As abrasives, anhydrous silicic acid, aluminum hydroxide, dibasic calcium phosphate dihydrate and anhydride, primary calcium phosphate, tertiary calcium phosphate, calcium carbonate, calcium pyrophosphate, titanium oxide, alumina, hydrated alumina, precipitated silica Other silica-based abrasives, aluminum silicate, insoluble sodium metaphosphate, insoluble potassium metaphosphate, tertiary magnesium phosphate, magnesium carbonate, calcium sulfate, bentonite, zirconium silicate, synthetic resin, etc. Species or two or more can be used.

  Examples of the fragrance include the following: essential oils such as peppermint and spearmint; fruit-based essences such as lemon and strawberry; 1-menthol, carvone, eugenol, anethole, linalool, limonene, ocimen, cineole, n- Fragrance materials such as decyl alcohol, citronellol, vanillin, α-terpineol, methyl salicylate, thymol, rosemary oil, sage oil, perilla oil, lemon oil and orange oil.

  Examples of medicinal ingredients include: bactericidal or antibacterial agents such as chlorohexidine, triclosan, isopropylmethylphenol, cetylpyridinium chloride, zinc gluconate, zinc citrate; condensed phosphates, ethane hydroxydiphospho Calculus preventive agents such as nates; anti-inflammatory agents such as tranexamic acid, glycyrrhizin dipotassium salt and ε-aminocaproic acid; coating agents such as hydroxyethylcellulose dimethyldiallylammonium chloride; enzyme agents such as dextranase and mutanase. The amount of the medicinal component can be adjusted within a pharmaceutically acceptable range.

  Examples of the solvent (solvent) include water and ethanol.

  Examples of the dosage form of the oral composition of the present invention include a dentifrice composition (e.g., toothpaste, toothpaste, powder dentifrice, liquid dentifrice, liquid dentifrice, water dentifrice), mouthwash, mouthwash composition, oral cavity, and the like. Various forms such as a patch composition for use. Of these, a dentifrice composition and a mouthwash composition are preferable from the viewpoints of effectiveness and stability. The form of the composition for oral cavity of the present invention is not particularly limited, and examples thereof include liquid, solid, paste, and gel.

  The lower limit of the pH of the oral composition of the present invention is preferably 6 or more from the viewpoints of effectiveness and stability. The upper limit is preferably 8.5 or less. The pH is preferably 6 to 8.5. The composition for oral cavity of this invention may contain the pH adjuster as needed. Examples of the pH adjuster include phosphoric acid or a salt thereof (for example, sodium phosphate, sodium hydrogenphosphate and the like), citric acid or a salt thereof (for example, sodium citrate), malic acid or a salt thereof, gluconic acid or The salt, maleic acid or its salt, succinic acid or its salt, glutamic acid or its salt, lactic acid, hydrochloric acid, acetic acid, nitric acid, sodium hydroxide, potassium hydroxide, etc. are mentioned. The compounding quantity of a pH adjuster can be adjusted in the range which does not impair the effect of this invention.

  When the example of the application amount to the human of the composition for oral cavity of this invention is given, when applying 3 times per day, the usage-amount of 1 time is 0.5-2g, Preferably it is about 0.5-1g. The amount can be adjusted as appropriate.

  Since the composition for oral cavity of this invention deposits an inorganic substance on the dentine surface and makes the part which dentin exposed the state close to an enamel, it can suppress hypersensitivity notably. In conventional oral compositions for suppressing hypersensitivity (for example, aluminum lactate and potassium nitrate), the effect of suppressing hypersensitivity was very temporary, whereas the oral composition of the present invention is Not only can hypersensitivity be remarkably suppressed, but also a sustained suppression effect can be exhibited. Therefore, the composition for oral cavity of the present invention can be rephrased as a composition for suppressing hypersensitivity and is useful for alleviating symptoms of hypersensitivity.

  Moreover, since the composition for oral cavity of this invention makes exposed dentine the state close | similar to enamel as above-mentioned, it can prevent dentin caries including root caries remarkably. Thereby, while being able to improve the hardness of dentin, the acid resistance of dentin can be improved. Therefore, the composition for oral cavity of the present invention can be rephrased as a dentin acid resistance improving composition or a dentin hardness improving composition for the prevention of dentine caries, particularly root caries. Useful.

  Further, since the composition of the present invention stably retains soluble fluoride, the function of improving acid resistance, the function of promoting remineralization, and the function of enzymatic action of plaque bacteria, which are the original functions of fluorine, are exhibited. The anti-eating effect can be remarkably exhibited. In addition, it is estimated that the stability of the soluble fluoride also contributes to the suppression of the above-mentioned hypersensitivity, the dentin hardness and the acid resistance. Further, (A) and (C) in the composition of the present invention are considered to have a role of improving the stability of the soluble fluorine compound in the composition, and (A) and (C) If it is added to an oral composition other than the present invention containing a fluorine compound, it is presumed that the effect of improving the stability of the soluble fluorine compound in the composition can be obtained. Therefore, the present invention can be applied as a composition for improving the stability of a soluble fluorine compound for an oral composition containing a fluorine compound containing (A) and (C).

  Since the oral taste composition of the present invention has improved metallic taste and bitterness derived from the component (C) and other components other than (A) to (C), the toothpaste composition combined with the above effects It is extremely useful as a composition for oral cavity such as a product and a mouthwash composition.

〔material〕
The raw materials used in the following examples are as follows.

(A-1): Whey FM Extract LA (Ichimaru Falcos Co., Ltd., whey solid content concentration: 7% by mass)
・ Whey powder DX (manufactured by Morinaga Milk Industry Co., Ltd., whey solid content concentration: 96 mass%)
(A-2): Lactoferrin-Lactoferrin EX (Morinaga Milk Industry Co., Ltd., actual concentration of lactoferrin solid content: 100% by mass)

(B): Fluorine compound Sodium fluoride (manufactured by Stella Chemifa Corporation)
・ Sodium monofluorophosphate (manufactured by Rhodia Nikka Co., Ltd.)

(C): Salts · Potassium nitrate (Wako Pure Chemical Industries, Ltd.)
・ Sodium nitrate (Wako Pure Chemical Industries, Ltd.)
・ Sodium chloride (Wako Pure Chemical Industries, Ltd.)
・ Potassium chloride (manufactured by Wako Pure Chemical Industries, Ltd.)
・ Sodium sulfate (manufactured by Wako Pure Chemical Industries, Ltd.)
・ Potassium dihydrogen phosphate (Wako Pure Chemical Industries, Ltd.)

(D): Other ・ Xylitol (Rocket Fleure)

Examples 1-37 and Comparative Examples 1-11 [Preparation of a toothpaste composition]
The toothpaste compositions having the compositions shown in Tables 1-1 to 1-5 were prepared as follows.

  A phase A was prepared by mixing and dissolving water-soluble components (whey, lactoferrin, sodium fluoride, sodium monofluorophosphate, potassium nitrate, sodium nitrate, sodium saccharin, 70 mass% sorbitol, etc.) in purified water at room temperature. In propylene glycol, oil-soluble components such as bactericides and preservatives (such as methylparaben) and binders such as sodium polyacrylate and sodium alginate were dissolved and dispersed at room temperature to prepare Phase B. Next, B phase was added and mixed in A phase under stirring, and C phase was prepared. In Phase C, fragrance, anhydrous silicic acid, and other ingredients (sodium lauryl sulfate, sodium hydroxide, etc.) are mixed at room temperature using a 1.5 L kneader (manufactured by Ishiyama Kogakusho), depressurized to 4 kPa and degassed. This was done to obtain 1.0 kg of a toothpaste composition.

[Experimental Example 1. (Stability test of soluble fluorine compound)
The toothpaste compositions of the above examples and comparative examples were filled in a 50 mL transparent container made of polypropylene and stored at 50 ° C. for 1 month.

  After thoroughly agitating the total amount of each packing after storage for 1 month, 10 mL thereof was collected in another polypropylene centrifuge, and the room temperature was 1500 × using a centrifuge (manufactured by Kokusan Centrifuge Co., Ltd., H-103N). g Centrifuge for 10 minutes.

After centrifugation, for Examples and Comparative Examples that do not contain sodium monofluorophosphate, carefully extract 1 mL of the supernatant after centrifugation into a 10 mL volumetric flask, add 5 mL of 1M potassium citrate buffer at pH 5.5, A test solution was used. Finally, the volume was made up to 10 mL with distilled water, and the soluble fluoride ion concentration (C _1M ) in the test solution was measured with a fluoride ion meter (ORION, EA-920).

For Examples and Comparative Examples containing sodium monofluorophosphate, 1 mL of the supernatant after centrifugation was carefully collected in a 3 mL screw-teflon Teflon (registered trademark) tube, and 1 mL of 2N sulfuric acid was added and sealed. Then, it was boiled for 10 minutes and hydrolyzed. After cooling, 1 mL of the hydrolyzed solution was carefully collected in a 10 mL volumetric flask, and 5 mL of 1 mol / L potassium citrate buffer solution with pH 5.5 was added to prepare a test solution. Finally, the volume is made up to 10 mL with distilled water, and the soluble fluoride ion concentration in the test solution (soluble fluoride ion concentration after storage for 1 month, C _1M ) is measured with a fluoride ion meter (ORION, EA-920). It was measured.

For each filling immediately after preparation, similarly to each filling after the above-mentioned storage for 1 month, a test solution is prepared and the soluble fluoride ion concentration in the test solution (soluble fluoride ion concentration immediately after preparation, C ₀ ) is determined. It was measured. For each of the examples and comparative examples, the residual ratio (%) of soluble fluoride ions after storage for 1 month compared with immediately after preparation was determined by the following formula (1).

[Formula (1)]
Residual rate of soluble fluoride ion (%) = (C ₀ −C _1M ) / C ₀ × 100

  According to the following evaluation criteria 1, the residual ratio of soluble fluoride ions calculated by the formula (1) was evaluated for each of Examples and Comparative Examples and shown in Tables 1-1 to 1-5.

[Evaluation criteria 1]
◎: Residual rate of soluble fluoride ions is 90% or more ○: Residual rate of soluble fluoride ions is 80% or more and less than 90% Δ: Residual rate of soluble fluoride ions is 60% or more and less than 80% Yes x: Residual rate of soluble fluoride ion is less than 60%

  As is clear from Tables 1-1 to 1-5, the evaluation of the toothpaste compositions of the examples was superior to the evaluation of the toothpaste compositions of the comparative examples. As a result, in the oral composition of the present invention, the fluorine compound (B) is stably present as a soluble fluorine compound without reacting with other components. It is shown that can be demonstrated efficiently.

[Experimental Example 2. Inhibition of hypersensitivity (stenosis and occlusion of dentinal tubules)
Using the composition prepared as described above, according to the method of Pashley et al. (J. Dent. Res. 57, 187-193, 1978), the amount of liquid passing through the dentinal tubule was measured, and the toothpaste of each example. The degree of stenosis and occlusion of dentinal tubules by the composition treatment was evaluated.

A 1 mm thick dentin disc was cut out from the crown of a human molar tooth, polished with water-resistant abrasive paper # 2000, etched with a 50% by mass citric acid aqueous solution, and a dentinal tubule was opened as a sample. For this sample, artificial saliva of pH 7.0 containing 10 g of each toothpaste composition of each example and comparative example, 1 mM equivalent CaCl ₂ , 3 mM equivalent KH ₂ PO ₄ and 1.0 unit / mL acid phosphatase. 20 g was mixed to obtain a 3-fold diluted solution, which was used as a treatment solution. The 3-fold dilution is based on the assumption that the toothpaste composition is diluted 3-fold with saliva when brushing. The sample was immersed in this treatment solution for 3 minutes, rinsed lightly with distilled water, then the excess treatment solution was removed, and immersed in the artificial saliva at 37 ° C. for 12 hours. The same operation was performed twice a day, and this series of operations was repeated for a total of 5 days. Furthermore, after immersing each sample in physiological saline for 3 minutes, the operation of performing water brushing for 20 seconds was repeated 20 times. After completion, rinse the sample thoroughly with distilled water, drain the water, fix it on the device, and flow physiological saline under constant pressure for 5 minutes, and measure the amount of physiological saline per unit time (5 minutes) passing through the sample did. By substituting the passage amount of the dentinal tubule after the treatment and the passage amount before the treatment with the treatment liquid containing the toothpaste composition of each Example and Comparative Example into the formula (2), each Example And the permeability suppression rate for every comparative example was calculated. It shows that the degree of stenosis and occlusion of a dentinal tubule after a treatment is so high that the permeability | blocking suppression rate shown by Formula (2) is large.

[Formula (2)]
Passability suppression rate (%) =
(Passage before treatment-Passage after treatment) / Passage before treatment x 100

  According to the following evaluation criteria 2, the permeability suppression rate calculated by the formula (2) was evaluated for each of Examples and Comparative Examples, and shown in Tables 1-1 to 1-5. Note that a series of experimental operations were performed at N = 5 for each example and comparative example, and the average value of the passability suppression rate was adopted for the evaluation based on the evaluation criterion 2.

[Evaluation criteria 2]
A: The permeability inhibition rate is 90% or more. O: The permeability inhibition rate is 80% or more and less than 90%. Δ: The permeability inhibition rate is 60% or more and less than 80%. X: The permeability inhibition rate is 60. Less than%

  As is clear from Tables 1-1 to 1-5, the evaluation of the toothpaste compositions of the examples was superior to the evaluation of the toothpaste compositions of the comparative examples. Among them, in Comparative Example 11 (aluminum lactate) corresponding to a conventional hypersensitivity inhibitor of Comparative Example, dentinal tubules are not sufficiently sealed, and in Comparative Examples 2 and 5 (potassium nitrate), dentinal tubules are completely blocked. On the other hand, in the sample treated with the toothpaste composition of the example, the dentinal tubule was effectively calcified and sealed to become enamel-like. This shows that the composition for oral cavity of the present invention can suppress hypersensitivity continuously and relieve symptoms remarkably.

[Experimental Example 3. Dentin acid resistance evaluation)
As the first confirmation experiment of the root caries prevention effect, the chemical strength (acid resistance) change of dentin was evaluated. Specifically, it is as follows.

A dentin block having a 2 mm × 2 mm window on the surface was prepared from the bovine root. Similarly to Experimental Example 2, the toothpaste compositions of each Example and Comparative Example were immersed in a treatment solution diluted with artificial saliva. Specifically, artificial saliva of pH 7.0 containing 10 g of the toothpaste compositions of each Example and Comparative Example, 1 mM equivalent CaCl ₂ , 3 mM equivalent KH ₂ PO ₄ and 1.0 unit / mL acid phosphatase. 20 g was mixed to obtain a 3-fold diluted solution, which was used as a treatment solution. The sample was immersed in this treatment solution for 3 minutes, rinsed lightly with distilled water, then the excess treatment solution was removed and immersed in the artificial saliva at 37 ° C. for 12 hours. The same operation was performed twice a day, and this series of operations was repeated for a total of 5 days.

On the last day, after thoroughly rinsing the sample with distilled water and draining the water, the sample was decalcified at pH 4.5 containing CaCl ₂ : 2.2 mM, KH ₂ PO ₄ : 2.2 mM and acetic acid: 100 mM. The sample was soaked at 37 ° C. for 6 hours. After 6 hours, the calcium ion concentration eluted in each decalcification solution was measured with an atomic absorption photometer (Hitachi Z-5310, manufactured by Hitachi High-Technologies), and the degree of demineralization of each dentin block (each example and comparison) Example elution Ca amount) was evaluated. Prepare a comparative sample with the same treatment except that it was immersed in artificial saliva without being immersed in the treatment solution, and the amount of calcium ions eluted in the decalcification solution for the comparative sample (μg) Was measured in the same manner as a reference decalcification amount (average amount of eluted Ca at N = 3).

  The elution Ca amount and the reference decalcification amount of each example and comparative example were substituted into the following formula (3) to calculate the dentin demineralization inhibition rate.

[Formula (3)]
Dentin demineralization inhibition rate (%) =
((Reference decalcification amount) − (elution Ca amount of examples or comparative examples)) / reference decalcification amount × 100

  From the dentin demineralization inhibition rate calculated by the above formula (3) according to the following evaluation criteria 3, the treatment solution containing the toothpaste compositions of Examples and Comparative Examples improves the dentin acid resistance after the treatment. The degree was evaluated and shown in Tables 1-1 to 1-5. In addition, a series of experiment operation was performed by N = 3 for each Example and the comparative example, and the average value of the demineralization suppression rate was employ | adopted for evaluation by the evaluation criteria 3. FIG.

[Evaluation criteria 3]
◎: Dentin demineralization inhibition rate is 50% or more ○: Dentin demineralization inhibition rate is 30% or more and less than 50% Δ: Dentin demineralization inhibition rate is 20% or more and less than 30% ×: Dentin demineralization inhibition rate Is less than 20%

  As is clear from Tables 1-1 to 1-5, the evaluation of the toothpaste compositions of the examples was superior to the evaluation of the toothpaste compositions of the comparative examples. As a result, the composition for oral cavity of the present invention has an action of depositing an inorganic substance on the surface of the dentin, sealing the dentinal tubule and suppressing decalcification, and thereby the portion where the dentin is exposed is enamel. It shows that the acid resistance of dentin can be remarkably improved as a state close to.

[Experimental Example 4. Evaluation of dentin hardness improvement effect)
As a second confirmation experiment of the root caries prevention effect, changes in physical strength (hardness) of dentin were evaluated. Specifically, it is as follows.

A 1 mm thick dentin disc was cut out from the crown of a human molar tooth and polished with water-resistant abrasive paper # 4000. Further, the dentin disc was ultrasonically cleaned (30 minutes × 2 times) to remove the dentin smear layer, and this was used as a sample. The toothpaste composition of each Example and Comparative Example was mixed with 10 g of artificial saliva of pH 7.0 containing 1 mM CaCl ₂ , 3 mM equivalent KH ₂ PO ₄ and 1.0 unit / mL acid phosphatase. A 3-fold diluted solution was used as a treatment solution. The 3-fold dilution is based on the assumption that the toothpaste composition is diluted 3-fold with saliva when brushing. The sample was immersed in this treatment solution for 3 minutes, rinsed lightly with distilled water, then the excess treatment solution was removed and immersed in the artificial saliva at 37 ° C. for 12 hours. The same operation was performed twice a day, and this series of operations was repeated for a total of 5 days.

  On the last day, the sample was rinsed well with distilled water and dried overnight at ambient temperature. The change in microhardness of the surface of the sample before and after the treatment was measured with a dynamic ultra-microhardness meter (DUH-211S, manufactured by Shimadzu Corporation). The test conditions were as follows: load: 50 mN, load holding time: 3 seconds, hardness value: average value of 5 load unloading tests per sample. In the following formula (4), the average hardness before treatment refers to the average value of the hardness of the toothpaste compositions of the examples and comparative examples and the hardness at five locations in the sample before artificial saliva treatment. The average hardness after treatment refers to the average value of the hardness at 5 locations in the sample after the toothpaste composition / artificial saliva treatment of each example and comparative example.

[Formula (4)]
Dentin hardness increase rate (%) =
((Average hardness before treatment) − (Average hardness after treatment)) / Average hardness before treatment × 100

  From the dentin hardness increase rate calculated by the above formula (4) according to the following evaluation criteria 4, the degree of improvement in dentin acid resistance after the treatment by the treatment liquid containing the toothpaste compositions of Examples and Comparative Examples Are shown in Tables 1-1 to 1-5. In addition, a series of experiment operation was performed by N = 3 for each Example and the comparative example, and the average value of the dentin hardness increase rate was employ | adopted for the evaluation by the evaluation criteria 4. FIG.

[Evaluation criteria 4]
◎: Dentin hardness increase rate is 30% or more ○: Dentin hardness increase rate is 20% or more and less than 30% △: Dentin hardness increase rate is 10% or more and less than 20% ×: Dentin hardness increase rate is less than 10%

  As is clear from Tables 1-1 to 1-5, the evaluation of the toothpaste compositions of the examples was superior to the evaluation of the toothpaste compositions of the comparative examples. As a result, the composition for oral cavity of the present invention has an action of depositing an inorganic substance on the surface of the dentin, sealing the dentinal tubule and suppressing decalcification, and thereby the portion where the dentin is exposed is enamel. It shows that the hardness of dentine can be remarkably improved as a state close to.

  The results of Experimental Examples 4 and 5 show that the oral composition of the present invention is excellent in the function of chemically and physically strengthening the exposed fragile dentin, and has a high preventive effect on dentin caries, among others. It has a high preventive effect on caries.

[Experimental Example 5. (Evaluation of feeling of use)
Ten panelists were used to evaluate the feeling of use of the toothpaste compositions of Examples and Comparative Examples. Specifically, each toothpaste composition was placed on a toothbrush of about 1 cm, brushed for 3 minutes, and rinsed with water. After brushing, a questionnaire was conducted on the feeling of use of each example and comparative example and the poor aftertaste after use, and scored according to the following evaluation criteria 5-1.

[Evaluation Criteria 5-1: Score of each subject]
4 points: good 3 points: somewhat good 2 points: somewhat bad 1 point: bad

  Further, in each of the examples and comparative examples, the average value of 10 panelists (N = 10) is obtained for the score based on the evaluation criterion 5-1, and the four-stage evaluation is performed based on the following evaluation criterion 5-2. The evaluation is shown in Tables 1-1 to 1-5.

[Evaluation Criteria 5-2; Average of 10 persons]
◎: 3.5 points or more ○: 3.0 points or more and less than 3.5 points △: 2.0 points or more and less than 3.0 points ×: Less than 2.0 points

  As is clear from Tables 1-1 to 1-5, the evaluation of the toothpaste compositions of the examples was superior to the evaluation of the toothpaste compositions of the comparative examples. This result shows that the oral cavity composition of the present invention is excellent in usability because the metal taste and saltiness of the salts contained in the composition are concealed.

Examples 38 to 43 [Toothpaste composition]
In the same procedure as in Example 1, toothpaste compositions having the following compositions were prepared.

[Composition of the toothpaste composition of Example 38]
(A): Whey 1.4% by mass (0.1% by mass as solid content)
(FM extract LA (solid content concentration: 7% by mass), manufactured by Ichimaru Falcos)
(B): Sodium fluoride 0.21% by mass (950 ppm as fluorine)
(C): Potassium dihydrogen phosphate 5.0% by mass
Silica anhydride 10.0% by mass
Sodium lauryl sulfate 1.0 mass%
Propylene glycol 3.0% by mass
Sodium alginate 0.3% by mass
Sodium polyacrylate 0.4% by mass
70% by mass Sorbitol 30.0% by mass
Saccharin sodium 0.01% by mass
Fragrance 0.5% by mass
Methylparaben 0.15% by mass
Sodium hydroxide appropriate amount Purified water remaining
Total 100% by mass
(A) / (C) mass ratio: 0.02, pH 7.0

[Composition of the toothpaste composition of Example 39]
(A): Whey 1.04% by mass (1.0% by mass as solid content)
(Whey powder DX (solid content concentration: 96 mass%), manufactured by Morinaga Milk Industry Co., Ltd.)
(B): Sodium fluoride 0.21% by mass (950 ppm as fluorine)
(C): Sodium sulfate 5.0 mass%
Silica anhydride 10.0% by mass
Sodium lauryl sulfate 1.0 mass%
Propylene glycol 3.0% by mass
Sodium alginate 0.3% by mass
Sodium polyacrylate 0.4% by mass
70% by mass Sorbitol 30.0% by mass
Saccharin sodium 0.01% by mass
Fragrance 0.5% by mass
Methylparaben 0.15% by mass
Sodium hydroxide appropriate amount Purified water remaining Total 100% by mass
(A) / (C) mass ratio: 0.2, pH 7.5

[Composition of the toothpaste composition of Example 40]
(A): Lactoferrin 1.0 mass% (1.0 as solid content)
(Lactoferrin EX (solid content concentration: 100% by mass), manufactured by Morinaga Milk Industry Co., Ltd.)
(B): Sodium fluoride 0.21% by mass (950 ppm as fluorine)
(C): Potassium nitrate 5.0% by mass
Silica anhydride 10.0% by mass
Sodium lauryl sulfate 1.0 mass%
Propylene glycol 3.0% by mass
Sodium alginate 0.3% by mass
Sodium polyacrylate 0.4% by mass
Dextranase 0.2% by mass
70% by mass Sorbitol 30.0% by mass
Saccharin sodium 0.01% by mass
Fragrance 0.5% by mass
Methylparaben 0.15% by mass
Sodium hydroxide appropriate amount Purified water remaining Total 100% by mass
(A) / (C) mass ratio: 0.2, pH 8.0

[Composition of the toothpaste composition of Example 41]
(A): Lactoferrin 1.0 mass% (1.0 mass% as solid content)
(Lactoferrin EX (solid content concentration: 100% by mass), manufactured by Morinaga Milk Industry Co., Ltd.)
(B): Sodium fluoride 0.21% by mass (950 ppm as fluorine)
(C): Potassium nitrate 5.0% by mass
Silica anhydride 10.0% by mass
Sodium lauryl sulfate 1.0 mass%
Propylene glycol 3.0% by mass
Sodium alginate 0.3% by mass
Sodium polyacrylate 0.4% by mass
Isopropylmethylphenol 0.02% by mass
70% by mass Sorbitol 30.0% by mass
Saccharin sodium 0.01% by mass
Fragrance 0.5% by mass
Methylparaben 0.15% by mass
Sodium hydroxide appropriate amount Purified water remaining Total 100% by mass
(A) / (C) mass ratio: 0.2, pH 8.0

[Composition of the toothpaste composition of Example 42]
(A): Whey 1.04% by mass (1.0% by mass as solid content)
(Whey powder DX (solid content concentration: 96 mass%), manufactured by Morinaga Milk Industry Co., Ltd.)
(B): Sodium fluoride 0.21% by mass (950 ppm as fluorine)
(C): Potassium nitrate 5.0% by mass
Silica anhydride 10.0% by mass
Sodium lauryl sulfate 1.0 mass%
Propylene glycol 3.0% by mass
Sodium alginate 0.3% by mass
Sodium polyacrylate 0.4% by mass
Cetylpyridinium chloride 0.05% by mass
70% by mass Sorbitol 30.0% by mass
Saccharin sodium 0.01% by mass
Fragrance 0.5% by mass
Methylparaben 0.15% by mass
Sodium hydroxide appropriate amount Purified water remaining Total 100% by mass
(A) / (C) mass ratio: 0.2, pH 7.5

[Composition of the toothpaste composition of Example 43]
(A): Whey 1.4% by mass (0.1% by mass as solid content)
(FM extract LA (solid content concentration: 7% by mass), manufactured by Ichimaru Falcos)
(B): Sodium fluoride 0.21% by mass (950 ppm as fluorine)
(C): Potassium dihydrogen phosphate 3.0% by mass
Silica anhydride 10.0% by mass
Sodium lauryl sulfate 1.0 mass%
Propylene glycol 3.0% by mass
Sodium alginate 0.3% by mass
Sodium polyacrylate 0.4% by mass
70% by mass Sorbitol 30.0% by mass
Xylitol 10.0% by mass
Saccharin sodium 0.01% by mass
Fragrance 0.5% by mass
Methylparaben 0.15% by mass
Sodium hydroxide appropriate amount Purified water remaining Total 100% by mass
(A) / (C) mass ratio: 0.03, pH 7.2

Examples 44 to 46 [Preparation of mouthwash composition]
Put a specified amount of purified water into a stainless steel container equipped with a three-one motor and a stirrer with rotating blades. Among the ingredients, whey, lactoferrin, sodium fluoride, sodium monofluorophosphate, potassium nitrate, sodium nitrate, Water-soluble components such as sorbitol were added and dissolved while stirring. On the other hand, in a separate stainless steel container equipped with a three-one motor and a stirrer with rotating blades, a specified amount of organic solvent such as ethanol is added and oil-soluble components such as fragrance and methylparaben are added while stirring. , Dissolved. Further, the oil-soluble component was added to the container in which the water-soluble component was dissolved, and the mixture was stirred for 30 minutes to obtain a uniform solution of 1.0 kg of the mouthwash.

[Composition of mouthwash composition of Example 44]
(A): Whey 1.4% by mass (0.1% by mass as solid content)
(FM extract LA (solid content concentration: 7% by mass), manufactured by Ichimaru Falcos)
(B): Sodium fluoride 0.044 mass% (200 ppm as fluorine)
(C): Potassium nitrate 5.0% by mass
Polyoxyethylene hydrogenated castor oil 2.0% by mass
(Average addition EO (ethylene oxide average addition mole number): 60 mol)
Ethanol 5.0% by mass
Glycerin 1.0% by mass
Saccharin sodium 0.01% by mass
Fragrance 0.15% by mass
Methylparaben 0.3% by mass
Sodium hydroxide appropriate amount Purified water remaining Total 100% by mass
(A) / (C) mass ratio: 0.02, pH 7.6

[Composition of mouthwash composition of Example 45]
(A): Whey 1.04% by mass (1.0% by mass as solid content)
(Whey powder DX (solid content concentration: 96 mass%), manufactured by Morinaga Milk Industry Co., Ltd.)
(B): Sodium fluoride 0.044 mass% (200 ppm as fluorine)
(C): Sodium nitrate 5.0 mass%
Polyoxyethylene hydrogenated castor oil 2.0% by mass
(Average addition EO (ethylene oxide average addition mole number): 60 mol)
Ethanol 5.0% by mass
Glycerin 1.0% by mass
Saccharin sodium 0.01% by mass
Fragrance 0.15% by mass
Methylparaben 0.3% by mass
Sodium hydroxide appropriate amount Purified water remaining Total 100% by mass
(A) / (C) mass ratio: 0.2, pH 7.0

[Composition of mouthwash composition of Example 46]
(A): Lactoferrin 1.0 mass% (1.0 mass% as solid content)
(Lactoferrin EX (solid content concentration: 100% by mass), manufactured by Morinaga Milk Industry Co., Ltd.)
(B): Sodium fluoride 0.044 mass% (200 ppm as fluorine)
(C): 5.0% by mass of potassium chloride
Polyoxyethylene hydrogenated castor oil 2.0% by mass
(Average addition EO (ethylene oxide average addition mole number): 60 mol)
Ethanol 5.0% by mass
Glycerin 1.0% by mass
Saccharin sodium 0.01% by mass
Fragrance 0.15% by mass
Methylparaben 0.3% by mass
Sodium hydroxide appropriate amount Purified water remaining Total 100% by mass
(A) / (C) mass ratio: 0.2, pH 7.5

Claims (8)

(A): whey and / or lactoferrin,
(B): a fluorine compound, and
(C): An oral composition containing at least one salt selected from the group consisting of a potassium salt and a sodium salt of an acid selected from nitric acid, hydrochloric acid, phosphoric acid and sulfuric acid.   The composition for oral cavity of Claim 1 whose mass ratio ((A) / (C)) with respect to said (C) of said (A) is 0.01-3.   The oral composition according to claim 1 or 2, wherein the (C) is at least one selected from potassium nitrate, sodium nitrate, sodium chloride and potassium chloride.   The composition for oral cavity as described in any one of Claims 1-3 which is a dentifrice composition or a mouthwash composition. (A): whey and / or lactoferrin,
(B): a fluorine compound, and
(C): A hypersensitivity suppressing composition containing at least one selected from the group consisting of potassium and sodium salts of nitric acid, hydrochloric acid, phosphoric acid and sulfuric acid. (A): whey and / or lactoferrin, and
(C): A soluble fluorine compound stability improving composition for an oral composition containing a fluorine compound containing at least one selected from the group consisting of potassium salt and sodium salt of nitric acid, hydrochloric acid, phosphoric acid and sulfuric acid . (A): whey and / or lactoferrin,
(B): a fluorine compound, and
(C): Dentin hardness-improving composition containing at least one selected from the group consisting of potassium salt and sodium salt of nitric acid, hydrochloric acid, phosphoric acid and sulfuric acid. (A): whey and / or lactoferrin,
(B): a fluorine compound, and
(C): A dentin acid resistance improving composition containing at least one selected from the group consisting of potassium salt and sodium salt of nitric acid, hydrochloric acid, phosphoric acid and sulfuric acid.