JP6565994B2 - Oral composition - Google Patents

Description

  The present invention relates to a composition for oral cavity having a high effect of chemically removing a biofilm that causes caries.

  In order to remove the biofilm in the oral cavity, not only a physical method by brushing using a toothbrush but also a chemical method capable of removing a biofilm that does not reach the brush is useful. Biofilms are composed of various oral bacterial coaggregates and extracellular polysaccharides. Thus, as chemical removal methods, it is known to use erythritol, which has a coaggregation-inhibiting action, and proteases such as enzymes that degrade extracellular polysaccharides, dextranase, and mutanase, but the effect is further improved. There is room for.

  In addition, surfactants are known to have a cleaning action, and are used in oral compositions as cleaning agents. In this case, sodium lauryl sulfoacetate is known as an activator having no irritation peculiar to an anionic surfactant (Patent Document 1: JP-A-6-72836).

  Conventionally, however, surfactants have been recognized as having a slight plaque removal effect in terms of their penetrating action and interfacial cleaning action, but sufficient use of a surfactant alone is sufficient. The current situation is that the biofilm removal effect is not recognized.

  Patent Document 2 (Japanese Patent Publication No. 2008-519043) discloses that an alkali metal salt or ammonium salt of alkyl sulfoacetate is used in combination with a water-soluble zinc salt. It is used to reduce the astringency of salt, and no biofilm removal effect is shown.

  On the other hand, it is described in Patent Document 3 (Japanese Patent Laid-Open No. 2010-275398) that arginine acts on co-aggregation between bacteria in a biofilm and promotes removal of the biofilm. Disclosed is a biofilm removing agent capable of removing a biofilm composed of bacteria, containing a compound having a biguanidine skeleton or a salt thereof and an alkaline agent, and arginine can be used as the alkaline agent. It is not biofilm removal.

JP-A-6-72836 Special table 2008-519043 gazette JP 2010-275398 A

  This invention is made | formed in view of the said situation, and it aims at providing the composition for oral cavity with the high effect of chemically removing the biofilm which causes a caries.

  As a result of intensive studies to achieve the above object, the present inventors have obtained (A) an anionic surfactant having a hydrophilic group composed of a sulfonate, and (B) (B-1) an acylamino acid salt. It has been found that, by combining, the removal effect of the oral biofilm can be remarkably improved, and the bitterness peculiar to the anionic surfactant of the component (A) can be suppressed.

In the present invention, the anionic surfactant of the component (A) and the (B-1) acylamino acid salt of the component (B) act specifically and synergistically to enhance the biofilm removal effect, Bitterness derived from the anionic surfactant of component A) can be suppressed.
That is, as shown in Comparative Examples and Examples described later, when alkyl sulfoacetate (sodium lauryl sulfoacetate) was used alone, the removal rate of the produced biofilm was only about 65%, and α-olefin sulfonic acid. When the salt is used alone, the biofilm removal rate is only about 66%. In addition, the removal rate of biofilm in acylamino acid salt (lauroyl sarcosine sodium) is about 35%, and there is no sufficient biofilm removal effect, especially the biofilm removal effect of acylamino acid salt is quite inferior, and this is another surface activity. Despite the fact that it is not considered to improve the biofilm removal effect even when used in combination with an agent, it is surprising that both alkyl sulfoacetate or α-olefin sulfonate and acylamino acid salt are used together. It has been found that a sufficient biofilm removal effect can be obtained by using a surfactant alone, in which anionic surfactants act synergistically and both these anionic surfactants are used in combination. In this case, alkylsulfoacetate (sodium laurylsulfoacetate) or α-olefin sulfonate and sodium lauryl sulfate may be used in combination, or acylamino acid salt (lauroyl sarcosine sodium) and sodium lauryl sulfate may be used in combination. It was found that a sufficient biofilm removal effect could not be obtained, and the biofilm removal effect was a specific action effect when an alkyl sulfoacetate or α-olefin sulfonate and an acylamino acid salt were used in combination. Furthermore, alkyl sulfoacetates have a strong bitter taste, and α-olefin sulfonates also have a bitter taste. Although its use has been disclosed in the literature, its use was actually avoided. However, when an acyl amino acid salt is used in combination with an alkyl sulfoacetate or an α-olefin sulfonate, the bitter taste derived from the alkyl sulfoacetate or the α-olefin sulfonate is eliminated, and the stimulation derived from the acyl amino acid salt is also suppressed. It has been found that it has been eliminated and can withstand actual use, and the present invention has been made.

  Furthermore, as shown in the comparative examples and reference examples described later, the biofilm removal rate in arginine is about 10%, and the biofilm removal effect is considerably inferior. In spite of the fact that the effect cannot be obtained, when the alkylsulfoacetate or α-olefin sulfonate and arginine are used in combination, both components surprisingly act synergistically, and the biofilm removal action is achieved. It was found to enhance. In this case, as described above, a sufficient biofilm removal effect cannot be obtained even when combined with arginine and sodium lauryl sulfate, and it is also sufficient when lysine is combined with alkylsulfoacetate or α-olefinsulfonate. The biofilm removal effect was not obtained, and the biofilm removal effect was found to be a specific action effect when alkylsulfoacetate or α-olefin sulfonate and arginine were used in combination. Furthermore, alkyl sulfoacetates have a strong bitter taste, and α-olefin sulfonates also have a bitter taste. Although its use has been disclosed in the literature, its use was actually avoided. However, when arginine was used in combination with alkylsulfoacetate or α-olefin sulfonate, the bitter taste derived from alkylsulfoacetate and α-olefin sulfonate was also eliminated, and it was found that it would be able to withstand actual use. The present invention has been made.

Accordingly, the present invention provides the following oral composition.
[1]
(A) 0.05 to 1 % by mass of an anionic surfactant selected from alkyl sulfoacetates having 10 to 20 carbon atoms in the alkyl group;
(B) an acyl taurine salt having a carbon number of 10 to 20 acyl group containing 0.05 to 0.5% by weight, indicating the mixing ratio of the (A) component (B) (A) / (B) is an oral composition which is a 0.1 to 20 as a mass ratio.
[2]
(B) The composition for oral cavity as described in [1] whose component is an acyl taurine salt chosen from sodium lauroyl methyl taurine, myristoyl methyl taurine sodium, and cocoyl methyl taurine sodium.
[3]
The composition for oral cavity according to [1] or [2], wherein ( A) / (B) is 0.2 to 10 as a mass ratio.
[4 ]
(A) In addition to the said alkyl sulfoacetate, (A) In any one of [1]-[ 3 ] containing the anionic surfactant chosen from C14-C16 alpha olefin sulfonate. Oral composition.
[ 5 ]
The oral composition according to any one of [1] to [ 4 ], wherein the pH of the composition is 6 to 10.
[ 6 ]
The composition for oral cavity according to any one of [1] to [ 5 ], which is a mouthwash or a dentifrice.
[ 7 ]
The composition for oral cavity according to any one of [1] to [ 6 ], which is for biofilm removal.

  The composition for oral cavity of the present invention uses (A) an anionic surfactant whose hydrophilic group is a sulfonate, and (B) (B-1) an acylamino acid salt and / or (B-2) arginine. This provides an excellent chemical removal effect of the oral biofilm that causes caries. Furthermore, the bitterness peculiar to the anionic surfactant of (A) component, especially alkyl sulfoacetate and (alpha) -olefin sulfonate can also be suppressed.

  The composition for oral cavity of the present invention contains (A) an anionic surfactant whose hydrophilic group is a sulfonate, and (B) (B-1) an acylamino acid salt and / or (B-2) arginine. Become. The oral composition is effective for removing an oral biofilm.

  (A) As an anionic surfactant whose hydrophilic group is a sulfonate, an alkylsulfoacetate and / or an α-olefin sulfonate can be used. When the anionic surfactant (A) is used in combination with the component (B), the biofilm removal effect is remarkably improved. Moreover, (B-1) has the effect of suppressing the oral mucosal irritation of acylamino acid salts.

  As the alkylsulfoacetate, alkali metal salts such as sodium and potassium alkylsulfoacetate having an alkyl group having 10 to 20 carbon atoms can be used, and commercially available products can be used. Sodium lauryl sulfoacetate is preferred.

  As the α-olefin sulfonate, alkali metal salts such as sodium and potassium of α-olefin sulfonic acid having 14 to 16 carbon atoms can be used, and preferably sodium α-olefin sulfonate having 14 carbon atoms. These are commercially available products. The α-olefin sulfonate may contain a hydroxyalkyl sulfonate as a by-product, and the ratio is not particularly limited, but is usually 20% by mass or less. Sulfonates can be used in the present invention.

  The blending amount of the component (A) is preferably 0.01 to 2% by mass in the composition for oral cavity, more preferably 0.02 to 1.5% by mass, and still more preferably 0.05 to 1% by mass. It is. When the content is 0.01% by mass or more, a sufficient biofilm removal effect can be obtained. Moreover, the inhibitory effect of oral mucosal irritation can be obtained. When it is 2% by mass or less, oral mucosal irritation and bitterness do not become strong, which is preferable in use.

(B) component is (B-1) acylamino acid salt and / or (B-2) arginine, and by using together with the above (A) component, the biofilm removal effect can be significantly improved, Furthermore, it has a bitter taste suppressing effect of the anionic surfactant of component (A), particularly alkyl sulfoacetate and α-olefin sulfonate.
As component (B), (B-1) acylamino acid salt or (B-2) arginine is used, but (B-1) acylamino acid salt and (B-2) arginine are used in terms of effect expression. Also good.

Examples of the acyl amino acid salt of the component (B-1) include acyl sarcosine salts and acyl taurine salts, and particularly alkali metals such as acyl sarcosine or acyl taurine having an acyl group having 10 to 20 carbon atoms, such as sodium and potassium. A salt can be preferably used. Stearoyl methyl taurine sodium etc. are mentioned.
(B-1) The acyl amino acid salt has a shorter carbon number and can improve the biofilm removal effect, but the oral mucosa irritation becomes stronger. Among them, lauroyl sarcosine sodium, myristoyl sarcosine sodium, cocoyl sarcosine sodium, lauroylmethyl Taurine sodium, myristoyl methyl taurine sodium, and cocoyl methyl taurine sodium are more preferable from the viewpoint of effect, and lauroyl sarcosine sodium, lauroyl methyl taurine sodium, myristoyl sarcosine sodium, myristoyl methyl taurine sodium are more preferable in terms of oral mucosal irritation. In particular, sodium lauroyl sarcosine and sodium lauroylmethyl taurine are preferred.

  (B-1) When the acylamino acid salt is blended, the blending amount is preferably 0.01 to 1% by mass in the oral composition, more preferably 0.02 to 0.8% by mass, and further Preferably it is 0.05-0.5 mass%. When the content is 0.01% by mass or more, a sufficient biofilm removal effect improving effect and bitterness suppressing effect can be obtained. When it is 1% by mass or less, oral mucosal irritation and bitterness do not become strong, which is preferable in use.

  (B-2) When blending arginine, the blending amount is preferably 0.01 to 10% by mass in the oral composition, more preferably 0.05 to 5% by mass, and still more preferably 0.00. 1 to 5% by mass. When the content is 0.01% by mass or more, a sufficient biofilm removal effect improving effect and bitterness suppressing effect can be obtained. When it is 10% by mass or less, the bitterness of arginine itself is not strongly expressed, and oral mucosal irritation and bitterness are not increased, which is preferable in use.

  Moreover, when mix | blending (B-1) acylamino acid salt and (B-2) arginine, it is preferable to mix | blend within the range of each compounding quantity, and to use both components together.

  The blending ratio of the component (A) and the component (B) is preferably 0.01 to 50 as the mass ratio of (A) / (B). When it mix | blends in this range, the biofilm removal effect is more excellent and the bitterness suppression effect improves. Furthermore, the oral mucosal irritation suppressing effect is improved. It is preferable to mix | blend (A) and (B) component in the composition for oral cavity in the range of the said compounding quantity in the state which maintained this compounding ratio.

Furthermore, the blending ratio of the component (A) and the component (B-1) is preferably (A) / (B-1) as a mass ratio of 0.01 to 50, more preferably 0.1 to 20, still more preferably. Is in the range of 0.2-10.
In addition, the blending ratio of the component (A) and the component (B-2) is preferably 0.01 to 50, more preferably 0.02 to 20, more preferably (A) / (B-2) as a mass ratio. Is in the range of 0.02-10.

In the present invention, (A) 0.05 to 1% by mass of sodium lauryl sulfoacetate and / or sodium α-olefin sulfonate and (B-1) acylamino acid salt, particularly lauroyl sarcosine sodium as 0 as component (B) It is particularly preferable that the content is 0.05 to 0.5% by mass, and (A) / (B-1) is in the range of 0.1 to 20, particularly 0.2 to 10, as the mass ratio.
Further, (A) 0.05 to 1% by mass of sodium lauryl sulfoacetate and / or sodium α-olefin sulfonate, 0.05 to 5% by mass of (B-2) arginine as component (B), 1 to 5% by mass, (A) / (B-2) is in a range of 0.01 to 20, particularly 0.02 to 10 as a mass ratio, and the pH of the composition is 6. A range of 5 to 9.5 is particularly preferable.

  Furthermore, in the present invention, it is preferable to blend condensed phosphate and / or sugar alcohol. When blended phosphate and / or sugar alcohol is blended, the biofilm removal effect is improved, and particularly when sugar alcohol is blended. Bitter taste suppression effect and oral mucosal irritation suppression effect are also improved.

Examples of the condensed phosphate include sodium salts such as pyrophosphoric acid, polyphosphoric acid, tripolyphosphoric acid, and metaphosphoric acid.
It is preferable that the compounding quantity of a condensed phosphate is 0.05-5 mass% in an oral cavity composition. The biofilm removal effect improves as the blending amount increases, but it is preferably 5% by mass or less in order to suppress the irritation and obtain a preferable one for use.

  Examples of the sugar alcohol include sorbitol, xylitol, erythritol and the like. It is preferable that the compounding quantity of sugar alcohol is 5-50 mass% in an oral cavity composition. The larger the blending amount, the better the biofilm removal effect and the better the bitterness suppression effect. However, in order to prevent the bitterness from becoming strong and to obtain a preferable one in use, 50% by mass or less is desirable.

  The composition for oral cavity of the present invention is prepared in the form of liquid, liquid, paste, etc., and can be prepared as a dentifrice such as toothpaste, liquid dentifrice, liquid dentifrice, moisturized dentifrice, mouthwash, etc. It can be prepared by the method.

  In addition to the above essential components, the oral composition of the present invention can be blended with other optional components depending on the dosage form, if necessary, within a range not impairing the effects of the present invention. Specifically, in addition to the above components, in the case of dentifrice, for example, abrasives, binders, thickeners, surfactants other than components (A) and (B-1), sweeteners, antiseptics An agent, a fragrance, a pigment, various active ingredients, a solvent such as water, a pH adjuster and the like can be blended. In the case of a mouthwash, for example, surfactants other than wetting agents, (A) and (B-1) components, solvents, pH adjusters, preservatives, bactericides, fragrances, sweeteners, dyes, various types An active ingredient etc. may be mix | blended.

Although the specific example of an arbitrary component is shown below, the component which can be mix | blended with the composition of this invention is not restrict | limited to these.
As the abrasive, silica-based abrasive such as crystalline silica, amorphous silica, silica gel, aluminosilicate, zeolite, calcium hydrogen phosphate anhydrate, calcium hydrogen phosphate dihydrate, calcium pyrophosphate, calcium carbonate, Examples thereof include aluminum hydroxide, alumina, magnesium carbonate, tribasic magnesium phosphate, zirconium silicate, tricalcium phosphate, hydroxyapatite, tetracalcium phosphate, and synthetic resin-based abrasive.
These abrasives can be used singly or in combination of two or more. Usually, in the case of dentifrice, 5 to 70% by weight, especially 10 to 50% by weight of the total composition. Can do.

  Examples of the binder include pullulan, gelatin, methyl cellulose, hydroxyethyl cellulose, hydroxypropyl cellulose, sodium carboxymethyl cellulose, carrageenan, sodium alginate, xanthan gum, sodium polyacrylate, gum arabic, guar gum, locust bean gum, polyvinyl alcohol, polyvinyl Examples include pyrrolidone and the like. These binders can be used individually by 1 type or in combination of 2 or more types, Usually, 0-10 mass% of the whole composition, Especially 0.1-5 mass% can be mix | blended.

  Examples of the thickening agent (wetting agent) include polyhydric alcohols such as propylene glycol, butylene glycol, glycerin, and polyethylene glycol. These thickeners are preferably blended within a range that does not impede the effects of the present invention. Usually, 0 to 70 mass%, particularly 3 to 50 mass% of the entire composition can be blended.

  As the surfactant, surfactants such as anionic surfactants and nonionic surfactants other than the components (A) and (B-1) can be blended. For example, alkyl sulfates, sulfates of glycerin fatty acid esters Anionic surfactants such as salt, polyoxyethylene alkyl ether, polyoxyethylene-polyoxypropylene block copolymer, polyoxyethylene hydrogenated castor oil, polyoxyethylene ether of glycerin ester, sucrose fatty acid ester, alkylolamide, etc. Nonionic surfactants can be used. These surfactants can be used individually by 1 type or in combination of 2 or more types, Usually, 0-10 mass% of the whole composition, Especially 0.1-5 mass% can be mix | blended. In addition, the blending amount of the nonionic surfactant is preferably 5% by mass or less.

  In the present invention, when a nonionic surfactant such as polyoxyethylene hydrogenated castor oil is added to the system using the (B-1) acylamino acid salt as the component (A), the biofilm removal effect tends to decrease. When (B-2) arginine is used as the component (B), a high biofilm removal effect can be maintained without reducing the biofilm removal effect. From this point, it is more preferable to combine (B-1) acylamino acid salt and (B-2) arginine as the component (B) in terms of effect expression.

  Examples of the sweetening agent include saccharin sodium, stevioside, neohesperidyl dihydrochalcone, glycyrrhizin, perilartin, p-methoxycinnamic aldehyde, thaumatin and the like.

  As the preservative, for example, paraoxybenzoic acid esters such as sodium benzoate, methylparaben, ethylparaben, and butylparaben, ethylenediaminetetraacetate, benzalkonium chloride, and the like can be blended.

  Perfumes include peppermint oil, spearmint oil, anise oil, eucalyptus oil, winter green oil, cassia oil, clove oil, thyme oil, sage oil, lemon oil, orange oil, peppermint oil, cardamom oil, coriander oil, mandarin oil, Lime oil, lavender oil, rosemary oil, laurel oil, camomil oil, caraway oil, marjoram oil, bay oil, lemongrass oil, origanum oil, pine needle oil, neroli oil, rose oil, jasmine oil, grapefruit oil, sweetie Natural fragrances such as oil, coconut oil, Iris concrete, absolute peppermint, absolute rose, orange flower, and processing of these natural fragrances (front reservoir cut, rear reservoir cut, fractional distillation, liquid-liquid extraction, essence, powder Perfume and l-mentor , Carvone, anethole, cineol, methyl salicylate, cinnamic aldehyde, eugenol, 3-l-mentoxypropane-1,2-diol, thymol, linalool, linalyl acetate, limonene, menthone, menthyl acetate, N-substituted paramentane -3-Carboxamide, pinene, octyl aldehyde, citral, pulegone, carbyl acetate, anisaldehyde, ethyl acetate, ethyl butyrate, allylcyclohexane propionate, methyl anthranilate, ethyl methyl phenyl glycidate, vanillin, undecalactone , Hexanal, butanol, isoamyl alcohol, hexenol, dimethyl sulfide, cycloten, furfural, trimethylpyrazine, ethyl lactate, ethanol Oral compositions such as single flavors such as luthioacetate, and scents such as strawberry flavor, apple flavor, banana flavor, pineapple flavor, grape flavor, mango flavor, butter flavor, milk flavor, fruit mix flavor, and tropical fruit flavor. It can be used in combination with known perfume materials used in the above.

  As the coloring matter, a coloring matter that can be used in the oral composition can be arbitrarily used depending on the target color tone. Examples of food dyes include brilliant blue and tartrazine, and examples of pigments include titanium oxide.

Examples of active ingredients (medicinal ingredients) include bactericidal or antibacterial agents such as chlorohexidine, triclosan, isopropylmethylphenol, cetylpyridinium chloride, benzethonium chloride, benzalkonium chloride, zinc gluconate and zinc citrate, ethane hydroxydiphospho Calculus preventives such as nates, tranexamic acid, glycyrrhizic acid and salts thereof, anti-inflammatory agents such as allantochlorohydroxyaluminum, coating agents such as hydroxyethylcellulose dimethyldiallylammonium chloride, enzyme agents such as dextranase, mutanase, lysozyme chloride, Vitamins such as ascorbic acid and tocopherol acetate, astringents such as sodium chloride, hypersensitivity inhibitors such as aluminum lactate, strontium chloride and potassium nitrate, sodium fluoride, Sodium fluorophosphate, and fluoride such as stannous fluoride, can be used in pharmaceutically acceptable range.
Moreover, ethanol, water, etc. can be mix | blended as a solvent.

The pH of the composition of the present invention is not particularly limited as long as it is in a range that does not cause safety problems in the oral cavity and the human body, but is generally in the range of pH 6 to 10, particularly pH 6 to 9.
In particular, when (B-2) arginine is blended, the pH is preferably in the range of pH 6 to 10, more preferably pH 6.5 to 9.5. Within this range, the biofilm removal effect is more excellent, and oral mucosal irritation can be further suppressed, particularly in the combined system of component (A) and component (B) (B-2) arginine.

The pH of the composition may be adjusted using a pH adjuster, such as acetic acid, hydrochloric acid, sulfuric acid, nitric acid, citric acid, phosphoric acid, malic acid, gluconic acid, maleic acid, succinic acid, An appropriate amount of acid or alkali such as glutamic acid, sodium hydroxide, potassium hydroxide, sodium acetate, sodium carbonate, sodium citrate, sodium hydrogen citrate, sodium phosphate, sodium hydrogen phosphate and the like can be blended.
In addition, the compounding quantity of these arbitrary components can be made into the range which does not impair the effect of this invention.

  The present invention also provides an oral biofilm removal method comprising (A) an anionic surfactant having a hydrophilic group composed of a sulfonate, and (B) (B-1) an acylamino acid salt and / or (B-2) arginine. Provide the agent. In this case, the details of the blending components, blending amounts, ratios, and the like are the same as described above.

  EXAMPLES Hereinafter, although an Example and a comparative example are shown and this invention is demonstrated concretely, this invention is not restrict | limited to the following Example. In the following examples,% indicates mass% unless otherwise specified.

[Examples and Comparative Examples]
Mouthwashes (Examples 1-19, 23-88 and Comparative Examples 1-14) or dentifrices (Examples 20-22, 89-94) were prepared for the oral compositions having the compositions shown in Tables 1-10 by the following method. ) And was evaluated by the following method. The results are also shown in Tables 1-10. In each of Examples 1 to 3, 6, 7, and 10, the pH of the composition was in the range of 6 to 9.

  The preparation of the mouthwash is as follows. The required water-soluble components were completely dissolved at room temperature in purified water containing a wetting agent such as propylene glycol. Furthermore, surfactant etc. were mixed and it stirred with the stirrer which has a three-one motor and a rotary blade, and the mouthwash liquid was obtained as a uniform liquid.

  The preparation of the dentifrice is as follows. First, a desired water-soluble component was mixed at room temperature in purified water containing a wetting agent such as propylene glycol, and then a binder was further mixed and dispersed with a disper. A dispersion, an abrasive, and the like were placed in a kneader and mixed, and then a fragrance and a surfactant were added. The inside of the kneader was degassed by reducing the pressure to about 5 kPa, and further mixing was continued to obtain a dentifrice.

<Biofilm removal effect>
(1) Production method of model biofilm What was treated for 4 hours with human unstimulated saliva obtained by filtering a hydroxyapatite (HA) plate (manufactured by Asahi Optical Co., Ltd.) having a diameter of 7 mm and a thickness of 3.5 mm with a 0.45 μm filter. A basal medium mucin culture solution (BMM) ^{* 1} was used as a model biofilm carrier and a culture solution. The strains used to make the model biofilms were Actinomyces viscosus ATCC 43146, Baylonella parvula ATCC1745, ATCC1745, ATCC1745, ATCC1745. oralis) ATCC 10557, Streptococcus mutans ATCC 25175. These 5 strains were inoculated to 1 × 10 ⁷ cfu / mL (cfu: colony forming units) in a Rotating Disk Reactor (culture tank) containing 3,000 mL of BMM in advance, and 37 ° C. with a saliva-treated HA carrier. The cells were cultured for 24 hours under anaerobic conditions (5 vol% carbon dioxide gas, 95 vol% nitrogen). Thereafter, a BMM medium was continuously supplied under the same conditions at a substitution rate of 5 vol% / hour and cultured for 10 days to form a model biofilm of 5 strains mixed on the HA surface.

(2) Model biofilm removal effect The formed model biofilm was transferred to a 24-well multiplate (manufactured by Sumitomo Bakelite Co., Ltd.), and the oral composition shown in the table (2 mL of mouthwash, healthy toothpaste) Then, 2 mL of a centrifugal supernatant (10,000 rpm, 10 minutes) of a 3-fold diluted solution of saliva collected from the sample was added and immersed for 3 minutes. Then, it was washed 6 times with 1 mL of PBS (manufactured by Wako Pure Chemical Industries, Ltd.) and dispersed by sonication (200 μA, 10 seconds) in a test tube (diameter 13 mm × 100 mm) to which 2 mL of the same buffer was added. The residual amount of biofilm was measured by measuring the turbidity of the dispersion at a wavelength of 550 nm.

The biofilm removal effect of the test composition was determined by calculating the removal rate relative to the control (PBS treatment: immersed in 2 mL of PBS instead of the oral composition) according to the following formula, and judging the biofilm removal effect according to the following criteria from this removal rate did.
Biofilm removal rate (%)
= (Control turbidity-test composition treatment turbidity) / control turbidity x 100
(Criteria for biofilm removal effect)
AA: Biofilm removal rate is 80% or more A: Biofilm removal rate is 70% or more and less than 80% B: Biofilm removal rate is 60% or more and less than 70% C: Biofilm removal rate is 50% or more and less than 60% D : Biofilm removal rate is less than 50% (A or higher was accepted)

^{* 1} BMM composition: Expressed by mass in 1 liter.
Proteose peptone (Becton and Dickinson): 4g / L
Tryptone (Becton and Dickinson): 2g / L
Yeast extract (Becton and Dickinson): 2g / L
Mucin (manufactured by Sigma): 5 g / L
Hemin (manufactured by Sigma): 2.5 mg / L
Vitamin K (manufactured by Wako Pure Chemical Industries): 0.5mg / L
KCl (Wako Pure Chemical Industries, Ltd.): 1g / L
Cysteine (Wako Pure Chemical Industries, Ltd.): 0.2 g / L
Distilled water: Residue (Measured up to a total volume of 1 L and autoclaved at 121 ° C. for 20 minutes.)

<Oral mucosal irritation and bitterness evaluation>
The oral mucosal irritation and bitterness of the oral compositions listed in the table were subjected to sensory evaluation (6 panelists) based on the following criteria. The mouthwash contained 10 mL of the composition in the mouth and was evaluated by rinsing for 20 seconds. The dentifrice was evaluated by taking 1 g of a toothbrush and brushing for 3 minutes. Oral mucosal irritation and bitterness were evaluated based on the following evaluation criteria from the average of 6 persons.

Oral mucosal irritation (score criteria)
5: I do not feel stimulation 4: I do not feel stimulation almost 3: I feel a little stimulation 2: I feel stimulation 1: I feel strong stimulation (Evaluation criteria)
◎: Average value is 4 or more and 5 or less ○: Average value is 3 or more and less than 4 points △: Average value is 2 or more and less than 3 points ×: Average value is 1 or more and less than 2 points

Bitterness (grading standard)
5: No bitterness 4: Little bitterness 3: Some bitterness 2: Some bitterness 1: Strong bitterness (Evaluation criteria)
◎: Average value is 4 or more and 5 or less ○: Average value is 3 or more and less than 4 points △: Average value is 2 or more and less than 3 points ×: Average value is 1 or more and less than 2 points

なお、表５中、参考例３８、４１のＡ／Ｂは、Ａ／（Ｂ−１）の質量比である。

In Table 5, A / B in Reference Examples 38 and 41 is a mass ratio of A / (B-1).

＊；炭素数１４のα−オレフィンスルホン酸ナトリウム（以下、同様）。

*: Sodium α-olefin sulfonate having 14 carbon atoms (hereinafter the same).

なお、表７中、参考例６３のＡ／Ｂは、ラウリルスルホ酢酸ナトリウム／（Ｂ−１）の質量比である。

In Table 7, A / B in Reference Example 63 is a mass ratio of sodium lauryl sulfoacetate / (B-1).

なお、表１０中、参考例９０、９４のＡ／Ｂは、ラウリルスルホ酢酸ナトリウム／（Ｂ−１）の質量比である。

In Table 10, A / B in Reference Examples 90 and 94 is a mass ratio of sodium lauryl sulfoacetate / (B-1).

  From the results of Tables 1 to 10, it was confirmed that the composition for oral cavity of the present invention was excellent in oral biofilm removal effect and further had no oral mucosal irritation and bitterness. On the other hand, when any of the components (A) and (B) is lacking, or when other components are used instead of the components (A) and (B), both are satisfactory oral biofilm removal effects. Cannot be obtained, and it has oral mucosal irritation and bitterness, and the object of the present invention cannot be achieved.

Claims (7)

(A) 0.05 to 1 % by mass of an anionic surfactant selected from alkyl sulfoacetates having 10 to 20 carbon atoms in the alkyl group;
(B) an acyl taurine salt having a carbon number of 10 to 20 acyl group containing 0.05 to 0.5% by weight, indicating the mixing ratio of the (A) component (B) (A) / (B) is an oral composition which is a 0.1 to 20 as a mass ratio.   The composition for oral cavity according to claim 1, wherein the component (B) is an acyl taurine salt selected from sodium lauroylmethyltaurine, sodium myristoylmethyltaurine and sodium cocoylmethyltaurine. ( A) / (B) is 0.2-10 as mass ratio, The composition for oral cavity of Claim 1 or 2. The oral cavity according to any one of claims 1 to 3 , comprising an anionic surfactant selected from α-olefin sulfonates having 14 to 16 carbon atoms in addition to the alkyl sulfoacetate as component (A). Composition. The composition for oral cavity according to any one of claims 1 to 4 , wherein the composition has a pH of 6 to 10. It is a mouthwash or a dentifrice, The composition for oral cavity of any one of Claims 1-5 . It is an object for biofilm removal, The composition for oral cavity of any one of Claims 1-6 .