JP2012219038A - Composition for oral cavity - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a composition for an oral cavity by which caries prevention effect can be expected sufficiently, by increasing a taking amount of fluorine ion into enamelum or dentin of teeth, while using jointly a disaccharide such as trehalose and a fluorine ion-feeding compound, followed by improvement of acid resistance of teeth.SOLUTION: This composition for an oral cavity contains following components (A), (B) and (C): (A) a 25-50 mass% disaccharide whose solubility to water at 20°C is ≤50 mass%, (B) 10-40 mass% water, and (C) a fluorine ion-feeding compound as much as 0.002-5 mass% in terms of fluorine atoms; wherein the mass ratio (A/B) of the component (A) to the component (B) is 1-4.

Description

  The present invention relates to a composition for oral cavity containing a fluoride ion supplying compound and a disaccharide having low solubility in water.

  The main component of the tooth is hydroxyapatite, and in the mouth, the elution (decalcification) of phosphate ions and calcium ions and the crystallization (remineralization) to calcium phosphate and hydroxyapatite are usually in an equilibrium state. Dental caries promotes decalcification by causing bacteria such as Streptococcus mutans to decompose sucrose to produce organic acids, lowering the pH, and eluting tooth calcium etc. It will progress in. In the initial stages of caries, enamel produces subsurface demineralized lesions of the teeth called white spots. Here, it is known that fluorine ions can prevent the occurrence of caries and eliminate such vitiligo by promoting crystallization of calcium ions and phosphate ions, that is, remineralization.

  On the other hand, disaccharides such as trehalose and trehalulose are known to reduce miscellaneous taste such as astringency and astringency, and to provide a good taste and feeling of use (for example, Patent Document 1). Since it also has the effect | action which prevents the generation | occurrence | production of this effectively, the food / beverage products and cosmetics, pharmaceuticals, etc. which mix | blended this are also reported (for example, patent document 2). Furthermore, a composition for oral cavity containing trehalose, a sugar alcohol such as xylitol, sorbitol, and polylysine or a salt thereof is also disclosed as a technique for exerting a caries prevention effect by a disaccharide such as trehalose (for example, Patent Document 3). ). Thus, when a disaccharide such as trehalose is contained, not only can the taste be improved, but it can greatly contribute to the prevention of caries.

  Under these circumstances, Patent Document 4 discloses trehalose, a fluoride ion supply substance, and calcium ion supply as a technique in which a fluorine ion supply compound and a disaccharide such as trehalose are used in combination to further prevent dental caries and promote remineralization. An oral composition containing a substance has been disclosed, and it is shown that the amount of calcium ions attached to plaques is increased by the formation of a complex between trehalose and calcium ions.

JP 2004-149490 A JP-A-9-313117 Japanese Patent Laid-Open No. 2007-8824 JP 2000-154127 A

  In order to incorporate fluoride ions into the tooth enamel or dentin and promote remineralization, it may be possible to increase the fluoride ion concentration. It is difficult to contain the composition in the composition, and it is desirable to efficiently incorporate a small amount of fluorine ions into the enamel or dentin. However, although the composition for oral cavity described in Patent Document 4 is used in combination with a fluorine ion supply compound, it is mainly intended to improve the retention of calcium ions in plaque, and fluorine ions are efficiently used. Sufficient studies have not been made on prescriptions for incorporation into enamel. Therefore, even if the composition for oral cavity disclosed in the above-mentioned patent document is used, it is not possible to ensure a sufficient amount of fluorine ions taken into the tooth enamel or dentin.

  Therefore, the object of the present invention is to improve the acid resistance of teeth by increasing the amount of fluoride ions taken into tooth enamel or dentin while using a disaccharide such as trehalose in combination with a fluoride ion supplying compound. An object of the present invention is to provide an oral composition capable of sufficiently expecting a caries prevention effect.

  Therefore, the present inventors based on the new finding that if the amount of water is too large relative to disaccharides such as trehalose, there is a possibility that sufficient fluoride ion uptake amount for tooth enamel etc. may not be secured. By using disaccharides with low solubility in water, the amount of water is adjusted to a certain range while using a fluoride ion supply compound, and the ratio of disaccharides and moisture is made constant, thereby enamel or dental dentition of teeth. It was found that the amount of fluorine ions taken up with respect to the quality significantly increases, the acid resistance of the teeth is improved, and an oral composition excellent in the effect of suppressing caries can be obtained.

That is, the present invention comprises the following components (A), (B) and (C):
(A) 25-50 mass% of disaccharides whose solubility in water at 20 ° C. is 50 mass% or less,
(B) 10 to 40% by mass of water,
(C) Fluorine ion supply compound 0.002 to 5% by mass in terms of fluorine atoms
The composition for oral cavity in which the mass ratio (A / B) of a component (A) and a component (B) is 1-4 is contained.

  If the composition for oral cavity of this invention is used, since the fluorine ion of a fluorine ion supply compound will be taken in efficiently in an enamel or dentin, the acid resistance of a tooth will be improved and the effect which suppresses a caries will improve.

Hereinafter, the present invention will be described in detail.
The composition for oral cavity of this invention contains the disaccharide (A) whose solubility with respect to water in 20 degreeC is 50 mass% or less. The disaccharide is obtained by bonding two molecules of monosaccharides, and the solubility means the dissolved amount (% by mass) of the disaccharide in 100% by mass of a saturated aqueous solution at 20 ° C. Specific examples of the disaccharide (A) having a solubility in water at 20 ° C. of 50% by mass or less used in the present invention include lactose (solubility in water at 20 ° C .: 21% by mass), trehalose ( Examples thereof include solubility in water at 20 ° C .: 41% by mass, palatinose (solubility in water at 20 ° C .: 39% by mass), cellobiose (solubility in water at 20 ° C .: 14%), and the like. These may be used alone or in combination of two or more. Among them, a disaccharide having a solubility in water at 20 ° C. of 20 to 45% by mass is preferable from the viewpoint of obtaining appropriate viscosity and physical properties while efficiently incorporating fluorine ions into tooth enamel and the like. Specifically, Trehalose and palatinose are preferable, and trehalose is more preferable.

  The disaccharide (A) is contained in the composition for oral cavity of the present invention in an amount of 25 to 50% by mass, more preferably 30 to 50% by mass, from the viewpoint of the effect of increasing the amount of fluorine ions taken into the tooth enamel and the like. More preferably, it contains 30 to 45% by mass.

  The content of water (B) in the composition for oral cavity of the present invention is important from the viewpoint of the effect of increasing the amount of fluorine ions taken into the enamel of teeth, and is 10 to 40% by mass, and is 12 to 35% by mass. % Is preferable, 15 to 30% by mass is more preferable, and 15 to 25% by mass is further preferable. A composition containing 10 to 40% by mass of water (B) and containing the disaccharide of component (A) in a mass greater than or equal to water (B) while allowing the undissolved disaccharide (A) to exist. It is considered that the fluidity of the fluorine ions of the fluorine ion supply compound (C) dissolved in the water (B) contained therein can be secured by imparting a structural viscosity. In addition, since the amount of disaccharide (A) dissolved in water is small, the fluorine ion concentration of the fluoride ion supply (C) in water (B) can be increased, and the high concentration of fluorine ions flows. It is thought to contact the teeth. Thus, the composition for oral cavity of the present invention can increase the amount of fluorine ions taken into the enamel of teeth. The water (B) includes water contained in, for example, an aqueous solution of a sugar alcohol (F) used for blending in addition to the purified water blended.

  The oral composition of the present invention preferably has a high structural viscosity. When 100 parts by weight of the composition is diluted by adding 25 parts by weight of water, the viscosity after dilution is the same as before dilution. What falls to 15% or less with respect to a viscosity is preferable, More preferably, it falls to 10% or less.

  The composition for oral cavity of the present invention has a mass ratio (A / B) of disaccharide (A) and water (B) of 1 to 4, and the mass of disaccharide (A) is larger than that of water (B). It is preferable that it is contained in the oral composition at a room temperature (20 ° C.) exceeding the saturated dissolution state and the disaccharide (A) in an undissolved state is present. The presence of the undissolved disaccharide (A) allowed the composition to have structural viscosity, while suppressing the decrease in fluidity of fluorine ions due to the dissolved disaccharide (A), and the composition was dissolved in water (B). From the viewpoint of securing the fluidity of the fluoride ions of the fluoride ion supply compound (C), the mass ratio (A / B) of the disaccharide (A) to the water (B) is preferably greater than 1 and less than or equal to 3; Largely less than 3 is preferable.

  The composition for oral cavity of the present invention contains a fluorine ion supply compound (C). The fluorine ion supply compound is a fluorine compound that releases fluorine ions in an aqueous solution. The fluorine ion supply compound may be an inorganic compound or an organic compound. Specifically, sodium fluoride, potassium fluoride, tin fluoride, sodium fluoride siliconate, ammonium fluoride, aluminum fluoride, silver fluoride, hexylamine hydrofluoride, decanolamine hydrofluoride, Examples thereof include octadecenylamine hydrofluorate, and sodium fluoride and ammonium fluoride are preferred, and sodium fluoride is particularly preferred from the viewpoint of high fluorine ion uptake into tooth enamel and the like. These fluorine ion supply compounds may be used alone or in combination of two or more. Moreover, sodium monofluorophosphate can also be used together as fluorine compounds other than the fluorine ion supply compound (C) which do not supply a fluorine ion directly.

  The fluoride ion supply compound (C) is 0.002 in terms of fluoride ion in the oral composition of the present invention from the viewpoint of ensuring a sufficient amount of fluoride ion uptake with respect to tooth enamel and the like and safety. -5% by mass, more preferably 0.01-1% by mass, and still more preferably 0.05-0.5% by mass.

  The composition for oral cavity of the present invention may further contain a sugar alcohol (E) having a low solubility of 40% by mass or less of the solubility in water at 20 ° C. Examples of the sugar alcohol (E) having a solubility in water at 20 ° C. of 40% by mass or less that can be used in the present invention include erythritol, mannitol, α-D-glucopyranosyl-1,6-sorbitol, α-D-glucopyranosyl- Examples include 1,6-mannitol, reduced palatinose, which is a mixture of α-D-glucopyranosyl-1,6-sorbitol and α-D-glucopyranosyl-1,6-mannitol.

  The erythritol used in the present invention may have a structure of any of the three isomers of L-erythritol, D-erythritol, and meso-erythritol, or may be a mixture. As crystalline erythritol, commercially available products such as those manufactured by Nikken Chemical Co., Ltd., Mitsubishi Chemical Foods Co., Ltd., and Celestor are available. The solubility of erythritol in water at 20 ° C. is 33% by mass.

  Mannitol is a kind of hexitol and is a sugar alcohol of mannose. Industrially, it is produced by electrolytic reduction of corn starch sugar and high-pressure reduction of sucrose. The mannitol used in the present invention is not particularly limited as long as it is at least one selected from D-mannitol, L-mannitol, and D, L-mannitol, but D-mannitol existing in nature is available. Easy and preferred. The solubility of mannitol in water at 20 ° C. is 18% by mass.

  Reduced palatinose is a disaccharide sugar alcohol and is an equimolar mixture of α-D-glucopyranosyl-1,6-mannitol and its isomer α-D-glucopyranosyl-1,6-sorbitol. Reduced palatinose is obtained by using sucrose as a raw material, converting sucrose to palatinose with a glycosyltransferase, and then performing a hydrogenation reaction. In addition, as the reduced palatinose, commercially available product names “Palatinite” from Mitsui Sugar Co., Ltd. and Suducker AG (Japanese name: South German Sugar Co., Ltd.) are available, and there is another name called isomalt. The solubility of reduced palatinose in water at 20 ° C. is 28% by mass.

  These sugar alcohols (E) can be used alone or in combination of two or more. Moreover, sugar alcohol (E) may mix | blend any of powder and a granular form.

  When these sugar alcohols (E) are contained, the composition for oral cavity of the present invention contains more than 0% by mass and not more than 30% by mass from the viewpoint of the effect of increasing the amount of fluorine ions taken into the enamel of teeth. Is preferable, 1-20 mass% is more preferable, and it is more preferable to contain 5-15 mass% further. In addition, the mass ratio ((A + E) / B) of the total content of the disaccharide (A) and the sugar alcohol (E) having low solubility in water according to the present invention to the water (B) gives the composition a structural viscosity. From the viewpoint of ensuring the fluidity of the fluorine ions of the fluorine ion supply compound (C) dissolved in water (B) while having it, it is preferably 1 to 6, more preferably 1 to 4, Further, it is preferably larger than 1 and not larger than 3.5.

  Further, the composition for oral cavity of the present invention has a solubility in water at 20 ° C. of 40% by mass as long as it does not hinder high fluorine uptake into tooth enamel and the like from the viewpoint of moistening effect and feeling of use. You may contain the other sugar alcohol (F) exceeding. Specific examples of the other sugar alcohol (F) include xylitol (solubility in water at 20 ° C .: 66% by mass) and sorbitol (solubility in water at 20 ° C .: 72% by mass).

  When other sugar alcohols (F) are contained, the content in the oral composition of the present invention is preferably 20% by mass or less from the viewpoint of securing a high fluorine uptake amount in the tooth enamel and the like. 15 mass% or less is more preferable, and 12 mass% or less is further more preferable. Moreover, from the viewpoint of ensuring the fluidity of the fluorine ions of the fluorine ion supply compound (C) dissolved in water (B), the water (B) contained in the oral composition of other sugar alcohols (F). The mass ratio (F / B) is preferably less than 1, and more preferably 0.8 or less.

  The oral composition of the present invention preferably contains glycerin from the viewpoint of efficiently incorporating fluorine ions into the tooth enamel or dentin. When it contains glycerin, it is preferable to contain 1-30 mass% in the composition for oral cavity of this invention from the point which hold | maintains a favorable taste and usability, Furthermore, it is preferable to contain 5-20 mass%. .

  It is preferable that the composition for oral cavity of the present invention further contains a binder (D). Examples of the binder (D) include sodium carboxymethylcellulose, hydroxyethylcellulose, carboxyvinyl polymer, xanthan gum, carrageenan, sodium alginate, hydroxypropylcellulose, sodium chondroitin sulfate and the like, and sodium carboxymethylcellulose, xanthan gum and carrageenan are preferable. These may be used alone or in combination of two or more.

  The binder (D) is blended for gelation of a gel-like dentifrice composition, for caking of a paste-like dentifrice composition or a toothpaste composition, or for caking of a coating composition. In the present invention, the content of the binder (D) in the composition for oral cavity is preferably 0.1 to 1.5% by mass from the viewpoint of securing the fluidity of fluorine ions in water (B). Further, 1.2% by mass or less is preferable, more preferably less than 1.0% by mass, and further preferably 0.8% by mass or less, dischargeability of the oral composition and shape retention on the toothbrush, Or it is preferable that it is 0.1 mass% or more from a viewpoint of the staying property to the tooth of the coating composition, and also it is preferable that it is 0.3 mass% or more.

  In the composition for oral cavity of the present invention, in addition to the above-mentioned components, a foaming agent, a foaming aid, an abrasive, a wetting agent other than component (D), a sweetening agent, a preservative, Bactericides, medicinal components, pigments, dyes, fragrances and the like can be appropriately contained. In addition, the component which forms an insoluble salt with fluoride ion may inhibit the effect of promoting the incorporation of fluoride ion into tooth enamel and the like. Examples of the component that forms an insoluble salt with fluoride ions include calcium salts such as calcium carbonate, calcium phosphate, hydroxyapatite, and the content of these in the oral composition of the present invention is preferably 2% by mass or less. 1 mass% or less is more preferable, and 0.1 mass% or less is further more preferable. In addition, examples of components that form insoluble salts with fluoride ions include tribasic acids such as citric acid and acids such as ethylenediaminetetraacetic acid. The content of these acids in the oral composition of the present invention is 0.00. The amount is preferably less than 1% by mass, more preferably less than 0.05% by mass, and still more preferably 0.01% by mass or less. The oral composition of the present invention is prepared in a dosage form such as a gel or a paste, for example, and is made into a dentifrice composition such as a toothpaste composition or a gel dentifrice composition, an oral composition for application, or the like. be able to.

  The oral composition of the present invention preferably has a viscosity of 1000 to 10,000 dPa · s at 20 ° C., more preferably 1500 to 9000 dPa · s, and still more preferably 2000 to 8000 dPa · s. By setting the viscosity to 10000 dPa · s or less, the fluorine ion of the fluorine ion supply compound (C) in the water (B) contained while giving the structural viscosity of the composition by the undissolved disaccharide (A) Can be ensured. The viscosity of the composition for oral cavity is packed in a container for viscosity measurement and stored in a thermostat at 20 ° C. for 24 hours. Then, using a helicopter type viscometer (B type viscometer), rotor H7, rotation speed 2.5 rpm Measurement can be performed under conditions of 1 minute.

  EXAMPLES Hereinafter, although this invention is demonstrated concretely based on an Example, this invention is not limited to these Examples. In the following examples,% means mass%.

(Test Example 1)
Compositions for oral cavity of Examples 1 to 7 and Comparative Examples 1 to 3 (dentifrice composition) by mixing each component of the sample containing the fluoride ion supply compound (sodium fluoride) shown in Table 1 and Table 2 and their contents Prepared). The pH was neutral (6-8).

After applying 100 mg of each sample of the dentifrice compositions of Examples 1 to 7 and Comparative Examples 1 to 3 to HAP pellets (APP-100 HOYA) 10 mm × 10 mm × 2 mm and placing them for 3 minutes, the dentifrice composition with ion exchange water And the pellets were dried. Extraction of fluoride ions from the dried pellets with 1N hydrochloric acid for 30 seconds, using a fluorine ion electrode (ionplus-Fluoride (ORION)) and an ion analyzer (Expandable ionAnalyzer EA 940 (ORION)) The amount of fluorine adsorbed on the HAP pellet was quantified.
The viscosity was measured for 1 hour in a thermostat at 20 ° C., and then the rotor H7 was used with a helipath viscometer (B-type viscometer), and the rotation speed was 2.5 rpm and 1 minute.

  As shown in Table 1, the comparative example 1 with a small amount of trehalose (A) and the mass ratio (A / B) of the component (A) to the component (B) is 1 or more, but the trehalose content is more than 25% by mass. Compared with comparative example 2 with few, Examples 1-5 which contain 25-45 mass% of trehalose (A), and the mass ratio (A / B) of (A) to water (B) is 1-4. In each case, a high fluorine uptake was confirmed. In Comparative Example 3, since the mass ratio (A / B) of component (A) to water (B) was as large as 4.8, the composition was powdery and the viscosity could not be measured. . Moreover, since it was a substantially solid substance, the amount of fluorine uptake was not measured.

  As shown in Table 2, even in the dentifrice compositions of Example 6 and Example 7 in which the trehalose content, water content, and viscosity are substantially equal, Example 7 containing erythritol and glycerin is more effective than Example 6. Further, it was confirmed that the fluorine uptake amount was improved by further containing (E) sugar alcohol and / or glycerin in the component (A) such as trehalose.

Claims (6)

The following components (A), (B) and (C):
(A) 25-50 mass% of disaccharides whose solubility in water at 20 ° C. is 50 mass% or less,
(B) Water 10 to 40% by mass, and (C) Fluorine ion supply compound 0.002 to 5% by mass in terms of fluorine atoms
The composition for oral cavity in which the mass ratio (A / B) of a component (A) and a component (B) is 1-4.   Furthermore, the composition for oral cavity of Claim 1 containing 0.1-1.5 mass% of binder (D).   Furthermore, (E) The composition for oral cavity of Claim 1 or 2 containing the sugar alcohol whose solubility with respect to water in 20 degreeC is 40 mass% or less.   The composition for oral cavity according to any one of claims 1 to 3, wherein the component (A) is trehalose.   Furthermore, the composition for oral cavity of any one of Claims 1-4 containing glycerol.   The composition for oral cavity according to any one of claims 1 to 4, wherein the viscosity at 20 ° C is 1000 to 10000 dPa · s.