JP2008169165A - Polishing material for pmtc - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a polishing material for PMTC (professional mechanical tooth cleaning) effective for removing biofilms and stains on the tooth surface or between the teeth without giving excessive roughening to the tooth surface. <P>SOLUTION: The polishing material for PMTC is produced by compounding (A) a silicic anhydride having an average particle diameter of 1-5 μm and an oil absorption of 30-70 mL/100 g with (B) a silicic anhydride having an average particle diameter of 6-12 μm and an oil absorption of 100-130 mL/100 g, wherein the compounding ratio of the silicic anhydride (A) to (B) is 1:3 to 2:1, the content of the silicic anhydride (A) is ≥10 wt.%, that of the silicic anhydride (B) is ≥10 wt.%, and the sum of the compounding amount of the silicic anhydrides (A) and (B) is 35-80 wt.%. A polishing material for PMTC free from the damaging trouble on the tooth surface can be produced by the method. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

The present invention relates to a PMTC abrasive used by a dentist or dental hygienist or other dental care professional to physically remove deposits such as stains and dental plaque on tooth surfaces and interdental portions.

Daily oral cleaning is basically performed by self-care, and is an act that is indispensable for controlling deposits such as biofilm and stain-causing substances, which are the cause of dental plaque. is there. However, since there are significant individual differences in oral cleaning techniques such as oral structure such as tooth alignment, saliva quality and secretion, oral bacterial flora, immune system status, eating habits, and brushing, continuous complete oral cleaning is continued. It is difficult to do. Therefore, in Japan, in the national health promotion movement (Health Japan 21) in the 21st century, we set the goal of “more than 30% of those who have undergone calculus removal and tooth cleaning”. As you can see, professional care by dental professionals complements self-care by removing biofilms and stubbornly adherent stains that have increased pathogenicity over time after attachment. However, the momentum to keep good oral hygiene is increasing. PMTC (Professional Mechanical Tooth Cleaning) is one of such professional care procedures, and refers to the cleaning of teeth using mechanical force performed by a dentist. The specific treatment method of PMTC is, for example, using a polishing material for PMTC containing abrasive particles by connecting a polishing brush, rubber cup, plastic chip, etc. to a handpiece that rotates electrically and at high speed according to the site to be cleaned However, it is performed by polishing and cleaning the tooth surface and the interdental portion. PMTC recognizes prevention of dental caries, periodontal disease and other diseases by maintenance of biofilm removal, maintenance during treatment, oral aesthetics such as stain removal, tooth surface lubrication, and oral refreshment. It is performed for various purposes such as enlightenment activities to strengthen the quality. Therefore, in order to achieve the purpose, PMTC abrasives with different properties are used according to the purpose, and high polishing power and cleaning power are possessed. The PMTC abrasive is also used in combination with the PMTC abrasive having a high lubricity.

Now that PMTC has become widespread, problems related to over-treatment by PMTC have begun to attract attention in dentistry journals and the like. The term “overtreatment” as used herein refers to the possibility of an adverse effect of damaging the fine structure of the tooth surface (enamel). For example, when using PMTC abrasives containing a large amount of hard and coarse abrasive particles used for the purpose of completely removing stains, it is used in combination with a PMTC-specific electric rotary tooth surface cleaning tool with a strong physical effect. As a result, large unevenness may occur on the tooth surface. That is, it has been found that the tooth surface may be damaged by PMTC. In particular, when using materials harder than tooth enamel, such as pumice and calcined aluminum oxide, which are known as highly abrasive particles with high stain removal effect, the degree of damage to the tooth surface will increase. It is a problem. Therefore, it is desired to develop a technique that does not cause irregularities on the tooth surface even when PMTC is performed. For example, a PMTC polishing material having a strong polishing power is used, and after removing the stain, a PMTC using a PMTC polishing material having a polishing power with a poor level of the stain removal effect is being attempted. In this method, the convexity convex portion apex portion of the unevenness generated in the first treatment is only rounded. Essentially, the degree of unevenness on the tooth surface does not change, so that no solution has been reached. In addition, a solution using new abrasive particles is proposed in Japanese translations of PCT publication No. 2004-51397, but the effect is still not sufficient.

The PMTC abrasive is used together with a cleaning tool (such as a polishing brush) that rotates at high speed. Therefore, the PMTC abrasive that is used by the rotational force of the cleaning part during the treatment is likely to scatter. Due to this scattering, not only the surroundings of the clothes and the room are soiled, but the PMTC abrasive at the tooth cleaning site is insufficient, so that the purpose such as stain removal and plaque removal cannot be sufficiently achieved. Therefore, during PMTC treatment, a work for wiping off the PMTC abrasive scattered outside the oral cavity and an operation for adding the PMTC abrasive to the cleaning tool are required, and the work efficiency of the PMTC has been significantly reduced. In addition, when the PMTC abrasive is used excessively, the tooth surface is polished more than necessary, which may cause severe damage.

Quint Booklet Series "PMTC and Oral Care by Purpose-Achieving Biofilm Control and Oral Care", Quintessence Publishing Co., Ltd., 2006

JP-T-2004-513773

In view of the conventional problems as described above, the present invention does not provide a PMTC abrasive that can remove biofilms and stains on the tooth surface and interdental parts without excessively uneven the tooth surface. Furthermore, it is intended to provide a PMTC abrasive that has excellent usability and operability, such as being difficult to scatter to the surroundings during PMTC.

The present invention provides the following PMTC abrasive.
Item 1 Silicic anhydride (A) having an average particle diameter of 1 to 5 μm and an oil absorption of 30 to 70 mL / 100 g and silicic anhydride (B) having an average particle diameter of 6 to 12 μm and an oil absorption of 100 to 130 mL / 100 g ), And the mixing ratio of silicic anhydride (A) and (B) is 1: 3 to 2: 1. Item 2 Silicic anhydride (A) is blended in an amount of 10% by weight or more, silicic anhydride (B) is blended in an amount of 10% by weight or more, and the total amount of silicic anhydride (A) and (B) is 35-80% by weight. The PMTC abrasive according to claim 1, wherein: Item 3 CTM (g) of anhydrous silicic acid (A), D (g) of anhydrous silicic acid (B) are added to 100 g of PMTC abrasive, and the amount of oil absorption of anhydrous silicic acid (A) is E (mL / g), when the oil absorption of silicic anhydride (B) is F (mL / g), the sum of the product of C and E and the product of D and F is 25 to 40 mL. The abrasive for PMTC according to claim 1 or 2.

In the present invention, it is possible to remove biofilm and stain without damaging the tooth surface excessively by mixing two kinds of specific silicic acid having different properties at a specific ratio to constitute a polishing material for PMTC. I found it. That is, silicic anhydride (A) having an average particle diameter of 1 to 5 μm and an oil absorption of 30 to 70 mL / 100 g and silicic anhydride (B) having an average particle diameter of 6 to 12 μm and an oil absorption of 100 to 130 mL / 100 g. ), And using a PMTC abrasive characterized in that the mixing ratio of silicic anhydride (A) and (B) is 1: 3 to 2: 1, excessive damage to the tooth surface In addition, it was found that biofilms and stains can be removed and that a sliding effect can be obtained. Silica anhydride that can be used in the present invention is obtained by synthesis, and since raw materials having various specifications such as particle size and hardness are commercially available, it can be adapted to the tooth quality of those who receive PMTC, or optimal depending on the application. A PMTC abrasive can be selected.

The two types of silicic acid anhydride that can be used in the present invention are not limited to other conditions as long as they have the following characteristics.

Silicic anhydride (A) that can be used in the present invention has the characteristics of an average particle diameter of 1 to 5 μm and an oil absorption of 30 to 70 mL / 100 g. The average particle diameter is Malvern using the principle of Fraunhofer diffraction.・ Measured with a master sizer, oil absorption can be measured by the method of JISK 5101-13-1. Silicic anhydride (A) may be synthesized by any method, but is preferably precipitated silica because it has little influence on the amount of oil absorption due to moisture absorption and is inexpensive. The RDA of silicic anhydride (A) is not particularly limited, but is preferably 150 to 200. This is because, when combined with silicic anhydride (B), if it is less than 150, the stain removal effect is hardly exhibited, and if it exceeds 200, the tooth surface (enamel) may be damaged. RDA can be determined by the method of Hefferren et al. (J. Dent. Res., Vol 55, 563, 1976).

The silicic acid anhydride (B) that can be used in the present invention has properties of an average particle diameter of 6 to 12 μm and an oil absorption of 100 to 130 mL / 100 g. Silicic anhydride (B) may be synthesized by any method, but precipitated silica is preferred for the same reason as silicic anhydride (A). Moreover, although RDA of silicic anhydride (B) is not specifically limited, 20-120 are preferable. When it is combined with silicic anhydride (B), if it is less than 20, the stain removal effect is hardly exhibited, and if it exceeds 120, the smoothing effect on the tooth surface cannot be obtained.

The PMTC abrasive of the present invention can be used in the form of powder, wet powder, paste, suspension, etc. The container for filling the PMTC abrasive of the present invention is made of glass or metal. A container having a material and shape suitable for the embodiment of the present invention may be used, such as a plastic or laminate type bottle container, a cup container or pouch container, a metal, plastic or laminate type tube container.

When a powdery PMTC abrasive is used, the object of the present invention can be achieved by mixing with liquid components such as water or saliva in the mouth and giving wettability immediately before the treatment. A wet powdery PMTC abrasive or a paste-like PMTC abrasive to which a component other than silicic acid is added has excellent usability or operability even if it is used as it is.

The wet powdery or paste-like PMTC abrasive comprises 10% by weight or more of anhydrous silicic acid (A) and 10% or more by weight of anhydrous silicic acid (B). Is obtained by adding a proper amount of other necessary components such as water. This PMTC abrasive can remove biofilms and stains, does not damage the tooth surface, suppresses scattering of the PMTC abrasive during PMTC treatment, and is easy to attach to a cleaning tool such as a polishing brush. It has been found that the effect of improving usability or operability can be obtained. In particular, a pasty PMTC abrasive in which the total amount of the silicic anhydrides (A) and (B) is 35 to 50% by weight is preferable. When the blending amount of silicic anhydride (A) and silicic anhydride (B) is less than 10% by weight or when the total blending amount of silicic anhydride (A) and (B) is less than 35% by weight In some cases, the effect is not exhibited, and the removal of deposits or the lubrication effect cannot be obtained.

When the blending amount of silicic anhydride (A) and (B) used in the present invention is 35 to 80% by weight, the total amount of oil absorption or water absorption of silicic acid becomes too large, so that the abrasive for PMTC is homogeneous and has good usability. You may not get. Therefore, further ingenuity is required in this case. In addition, when the PMTC abrasive is dried during PMTC treatment and the wettability is insufficient, the adhesion affinity between the PMTC abrasive and the cleaning tool and the tooth surface is lowered, and the PMTC abrasive may be scattered. To solve these problems, the blending amount of silicic acid anhydride (A) in 100 g of the PMTC abrasive is C (g), the blending amount of silicic acid anhydride (B) and D (g), and silicic anhydride ( When the oil absorption of A) is E (mL / g) and the oil absorption of silicic anhydride (B) is F (mL / g), the sum of the product of C and E and the product of D and F is 25 to 40 mL. Or 10 to 50% by weight of one or more selected from sugar alcohols, and the total amount of sugar alcohol and other polyhydric alcohol is 30 to 50% by weight. And found that the problem can be solved.

Examples of the sugar alcohol that can be used in the present invention include, but are not limited to, erythritol, xylitol, palatinit, arabitol, ribitol, sorbitol, mannitol, galactitol, maltitol, lactitol, inositol, quercitol and the like. Of these, xylitol, sorbitol, palatinit, mannitol, maltitol, and lactitol are preferable, and xylitol and sorbitol are more preferable.

Polyhydric alcohols other than sugar alcohols that can be used in the present invention refer to compounds that have two or more hydroxyl groups in the molecule and are liquid at 25 ° C. Specific examples include glycerin, propylene glycol, 1,3-butylene glycol, isoprene glycol, ethylene glycol, polyethylene glycol and the like. For the sugar alcohol and polyhydric alcohol of the present invention, it is most preferable to use sorbitol and glycerin together.

Moreover, the PMTC of this invention is mix | blended by 0.1-5 weight% of 1 type, or 2 or more types chosen from carboxymethylcellulose salt, hydroxyethyl cellulose, low substituted hydroxypropyl cellulose, xanthan gum, polyacrylate, and agar. It has been found that the stability over time of the abrasive for polishing and the ease of taking out the abrasive for PMTC from a container such as a tube container are drastically improved. Among them, it is preferable to select a PMTC abrasive that does not increase the viscosity of the entire PMTC abrasive despite the high retention of liquid components such as water, sugar alcohol, and polyhydric alcohol in the PMTC abrasive. For example, a 2% aqueous solution having a viscosity of 1000 to 3000 mPa · s is preferred, and a 2% aqueous solution having a viscosity of 1000 to 3000 mPa · s is preferred. Furthermore, a carboxymethyl cellulose salt having a 2% aqueous solution viscosity of 1000 to 3000 mPa · s and a degree of etherification of 1.2 to 1.4 is most preferable. As a compounding quantity, 0.1 to 5 weight% is preferable, and 0.5 to 1.0 weight% is the most preferable. When the blending amount is less than 0.1% by weight, a sufficient effect of stability over time cannot be obtained. Conversely, when the blending amount exceeds 5% by weight, the retention of the liquid component is too large, and the viscosity of the PMTC abrasive is too high. Since it becomes too high and the usability such as being difficult to take out from the container may deteriorate, it is not preferable.

The abrasive for PMTC of the present invention is used when a dentist or a dental health worker such as a dental hygienist mechanically treats a tooth surface. That is, an appropriate amount of the PMTC abrasive according to the present invention is attached to a polishing brush, a rubber cup or the like connected to a rotating device such as a contra-angle handpiece, and the tooth surface and interdental portion are treated. The use conditions may be set as appropriate according to the judgment of the practitioner, but the toothpaste abrasive of the present invention does not damage the tooth surface (enamel), so that the treatment can be performed with only a polishing brush without using a rubber cup. Also, the rotational speed of the polishing brush is preferably 10,000 rpm or less in consideration of scattering of the PMTC abrasive. However, if the rotational speed is too low, sufficient polishing power cannot be obtained. Therefore, the polishing brush is used at a rotational speed of 500 rpm or more. It is preferable. In consideration of scattering of the PMTC abrasive and polishing properties, it is particularly preferable to use the PMTC abrasive at a rotational speed of 1000 to 5000 rpm.

In the PMTC abrasive of the present invention, other components can be appropriately blended within a range not impairing the effects of the present invention. For example, abrasive particles, caking components, surfactant components, sweetening components, fragrance components, antiseptic components, active components, coloring components, and pH adjusting components other than those described above can be blended.

As an abrasive particle, abrasive particles other than said silicic acid anhydride are mentioned. Specifically, dicalcium phosphate dihydrate and anhydrous, calcium phosphate, tricalcium phosphate, calcium hydrogen phosphate, calcium carbonate, calcium pyrophosphate, aluminum hydroxide, alumina, aluminosilicate, hydrous silicic acid, silica gel, Examples thereof include aluminum silicate, insoluble sodium metaphosphate, tribasic magnesium phosphate, magnesium carbonate, calcium sulfate, polymethyl methacrylate, bentonite, zirconium silicate, hydroxyapatite, and synthetic resin. These abrasive particles may be used alone or in combination of two or more with silicic anhydride (A) and silicic anhydride (B).

As the caking component, in addition to the caking components, cellulose derivatives such as methylcellulose, sodium carboxymethylhydroxyethylcellulose, hydroxypropylcellulose, hydroxypropylmethylcellulose, alkali metal alginates such as sodium alginate, propylene glycol alginate, tragacanth gum, karaya gum , Gums such as gum arabic and carrageenan, synthetic binders such as polyvinyl alcohol, carboxyvinyl polymer, polyvinyl pyrrolidone, inorganic binders such as silica gel, aluminum silica gel, bee gum, laponite, etc. More than one species may be used in combination.

Examples of the surfactant component include water-soluble salts of higher alkyl sulfates having 8 to 18 carbon atoms in the alkyl group such as sodium lauryl sulfate and sodium myristyl sulfate, and water-soluble higher salts such as hydrogenated coconut oil fatty acid monoglyceride sodium monosulfate. Fatty acid monoglyceride monosulfate, higher alkyl sulfonate, higher fatty acid ester of 1,2-dihydroxypropane sulfonate, N-lauroyl, N-myristoyl or N-palmitoyl sarcosine sodium, potassium or ethanolamine lower Anionic active components such as substantially saturated higher fatty acid acylamides of aliphatic aminocarboxylic acid compounds, sucrose fatty acid esters, maltose fatty acid esters, maltitol fatty acid esters, maltotriitol fatty acid esters, maltote trito Fatty acid ester, maltopentylitol fatty acid ester, maltohexitol fatty acid ester, maltoheptitol fatty acid ester, sorbitan fatty acid ester, lactose fatty acid ester, lactinose fatty acid ester and other sugar fatty acid esters, stearic acid monoglyceride, polyoxyethylene sorbitan mono Laurate, polyoxyethylene sorbitan monostearate, polyoxyethylene (10,20,40,60,80,100 mole) hydrogenated castor oil, polymer of ethylene oxide and propylene oxide, and polyoxyethylene polyoxypropylene monolauryl ester Nonionic surfactant components such as condensation products of polyethylene oxide and fatty acids, fatty alcohols, polyhydric alcohols and polypropylene oxides, etc. Tines type include surfactants ingredient amino acid type.

Examples of sweetening ingredients include saccharin sodium, acesulfame K, stevioside, glycyrrhizin, perilartin, thaumatin, aspartylphenylalanine methyl ester, sucralose, palatinose, and palatinit. These sweetening ingredients may be used alone or in combination of two or more, and the blending amount thereof is 0.1 or the total amount of the two or more kinds with respect to the total amount of the PMTC abrasive of the present invention. 01 to 5% by weight.

As perfume ingredients, 1-menthol, dl-menthol, carvone, anethole, eugenol, methyl salicylate, limonene, ocimene, n-decyl alcohol, citronellol, α-terpineol, methyl acetate, citronellyl acetate, methyl eugenol, cineol, linalool , Ethyl linalool, crocodile, thymol, spearmint oil, peppermint oil, lemon oil, orange oil, sage oil, rosemary oil, cinnamon oil, pimento oil, diatom oil, perilla oil, winter green oil, clove oil, eucalyptus oil, etc. Can be mentioned. These flavor components may be used singly or in combination of two or more, and the blending amount thereof is 0.05 or the total amount of the PMTC abrasive according to the present invention, alone or as a total amount of two or more. -10 wt%, preferably 0.1 wt% to 5 wt%.

Examples of the antiseptic component include p-hydroxymethylbenzoic acid, p-hydroxyethylbenzoic acid, p-hydroxypropylbenzoic acid, p-hydroxybutylbenzoic acid, sodium benzoate, and lower fatty acid monoglyceride. These antiseptic components may be used alone or in combination of two or more, and the blending amount thereof is 0.001 with respect to the whole PMTC abrasive of the present invention, alone or as a total amount of two or more. ~ 0.5 wt%.

Active ingredients include aminobenzoic acid derivatives, bactericides such as cetylpyridinium chloride, chlorhexidine gluconate, chlorhexidine hydrochloride, hexetidine and triclosan, enzymes such as dextranase, amylase, protease, mutanase, lysozyme, and lytic enzyme (Litec Enzyme) , Alkali metal monofluorophosphates such as sodium monofluorophosphate and potassium monofluorophosphate, fluorides such as sodium fluoride and stannous fluoride, vitamin derivatives, tranexamic acid, epsilon aminocaproic acid, aluminum chlorohydroxyl allantoin, sanguinarine , Allantoin, dihydrocholesterol, glycyrrhizin salts, glycyrrhetinic acid, glycerophosphate, chlorophyll, sodium chloride, caropepe Id, and the like water-soluble inorganic phosphoric acid compounds. These active ingredients may be used alone or in combination of two or more.

As coloring components, Red No. 2, Red No. 3, Red No. 225, Red No. 226, Yellow No. 4, Yellow No. 5, Yellow No. 205, Blue No. 1, Blue No. 2, Blue No. 201, Blue No. 204, Green No. 3, titanium dioxide, mica titanium, titanium oxide and the like. These coloring components may be used alone or in combination of two or more.

Examples of the pH adjusting component include hydrochloric acid, citric acid, malic acid, lactic acid, tartaric acid, acetic acid, phosphoric acid, pyrophosphoric acid, glycerophosphoric acid and various salts thereof, and sodium hydroxide and potassium hydroxide. The pH of the PMTC abrasive of the present invention is adjusted to be in the range of 5-9, preferably 6-8, in a 2% aqueous solution.

Hereinafter, the present invention will be described in more detail with reference to test examples and examples, but the present invention is not limited thereto. Unless otherwise specified, [%] indicates [% by weight].

Example 1 (Abrasive for Paste PMTC)
Silicic anhydride A (silica: average particle size 4 μm, oil absorption 50 mL / 100 g) 20%
Silicic anhydride B (silica: average particle size 9 μm, oil absorption 110 mL / 100 g) 20%
Sorbit liquid 25%
Glycerin 20%
Polyethylene glycol 3.0%
Sodium lauryl sulfate 0.5%
Polyoxyethylene alkyl sulfosuccinate disodium 0.2%
Titanium oxide 0.5%
Sodium carboxymethylcellulose 0.5%
Methyl paraben 0.1%
Fragrance 0.5%
Blue No. 1 0.001%
Water balance

Comparative Example 1 (Commercial PMTC abrasive for stain removal)
Pumice 25% (analysis value)
Glycerin carboxymethylcellulose sodium paraben monofluorophosphate and others

Evaluation 1: The surface of bovine enamel cut to a stain removal force of 2 × 2 mm was mirror-polished, immersed in 0.2 mol% hydrochloric acid for 60 seconds, washed with ion-exchanged water, and then immersed in a saturated aqueous sodium carbonate solution for 30 seconds. After washing with ion-exchanged water, the sample was immersed in a 1% phytic acid solution for 60 seconds and washed with ion-exchanged water. This test piece is immersed in a pseudo stain solution (a solution obtained by adding 3.4 g of commercial instant coffee and 2.5 g of porcine stomach mucin to 1 liter of distilled water obtained by boiling two commercial instant tea tea bags for 10 minutes). Then, pseudo stain was adhered, and after drying, the color was measured with a color difference meter CR241 (manufactured by Minolta Co., Ltd.). Thereafter, 0.25 g of PMTC abrasive of Example 1 and Comparative Example 1 and 30 μL of ion-exchanged water were placed on the test piece, and the surface of the test piece was polished using a polishing brush under the conditions of 3000 rpm, 30 seconds, and a load of 150 g. After that, the same part as before polishing was measured with a color difference meter, and the change (ΔL) in the color of the tooth surface before and after polishing was obtained. The greater the change in the color of the tooth surface before and after polishing, that is, the larger the ΔL value, the more the attached stain is removed. The result of the experiment is shown in FIG.

  As shown in FIG. 1, Example 1 was found to have a stain removal ability equal to or greater than that of Comparative Example 1 using pumice.

Evaluation 2 Tooth surface (enamel) roughness after PMTC The surface of bovine enamel cut to 2 × 2 mm was mirror-polished, and 0.25 g of PMTC polishing material of Example 1 and Comparative Example 1 and ion-exchanged water 30 μL was placed on the test piece, and the surface of the test piece was polished using a polishing brush under the conditions of 3000 rpm, 30 seconds, and a load of 150 g. The surface fine shape of the polished part was measured using a surface roughness meter Surfcom 1400 (manufactured by Tokyo Seimitsu Co., Ltd.). The results of the experiment are shown in FIGS. The waveform of the graph shows the fine structure of the bovine enamel surface after polishing.

  As shown in the graph, since the surface of the bovine enamel subjected to PMTC using Example 1 has almost no unevenness, it indicates that the enamel surface is not damaged. On the other hand, since the surface of the bovine enamel subjected to PMTC using Comparative Example 1 has numerous indentations, it is clear that the enamel surface is greatly damaged.

From the results of Evaluation 1 and Evaluation 2, PMTC using Example 1 was able to remove stain without damaging the tooth surface when the tooth surface was polished. On the other hand, when the tooth surface was polished using Comparative Example 1, although the stain could be removed, it was confirmed that the tooth surface was damaged.

Example 2 (powder form)
Silicic anhydride A (average particle size 4μm, oil absorption 60mL / 100g) 60%
Silicic anhydride B (average particle size 11 μm, oil absorption 100 mL / 100 g) 40%

Example 3 (wet powder form)
Silicic anhydride A (average particle size 2 μm, oil absorption 40 mL / 100 g) 20%
Silica B (average particle size 12μm, oil absorption 130mL / 100g) 60%
Glycerin 5.0%
Propylene glycol 3.0%
Sodium carboxymethylcellulose 0.2%
Fragrance 0.1%
Polyoxyethylene hydrogenated castor oil 40 0.1%
Mica titanium 0.1%
Water balance

Example 4 (paste-like)
Silicic anhydride A (average particle size 5μm, oil absorption 30mL / 100g) 10%
Silicic anhydride B (average particle size 12μm, oil absorption 100mL / 100g) 30%
Glycerin 15%
Xylitol 20%
Propylene glycol 5.0%
Sodium lauryl sulfate 2.0%
Xanthan gum 1.0%
Saccharin sodium 0.1%
Fragrance 0.6%
Sodium fluoride 0.2%
The remainder of the water (sum of the product of the amount of silicic acid absorbed and blended: 33)

Example 5 (paste-like)
Silicic anhydride A (average particle size 1 μm, oil absorption 70 mL / 100 g) 24%
Silicic anhydride B (average particle size 6μm, oil absorption 130mL / 100g) 12%
Glycerin 30%
10% Paratinit
Erythritol 5.0%
Lauroyl sarcosine sodium 0.5%
Sodium polyacrylate 1.0%
Stevioside 0.1%
Fragrance 0.6%
Chlorhexidine hydrochloride 0.1%
The remainder of the water (sum of the product of the amount of oil absorption and the amount of silicic anhydride: 32.4 (mL))

Example 6 (paste-like)
Silicic anhydride A (average particle size 3μm, oil absorption 40mL / 100g) 25%
Silicic anhydride B (average particle size 8μm, oil absorption 120mL / 100g) 25%
Glycerin 10%
Maltitol 30%
Ethylene glycol 5.0%
Cocamidopropyl betaine 1.5%
Hydroxyethyl cellulose 1.0%
Saccharin sodium 0.1%
Fragrance 0.6%
Tocopherol acetate 0.2%
The remainder of the water (sum of the product of silicic acid oil absorption and blending amount: 40 (mL))

Example 7 (paste-like)
Silicic anhydride A (average particle size 3μm, oil absorption 70mL / 100g) 12%
Silicic anhydride B (average particle size 9μm, oil absorption 120mL / 100g) 15%
Calcium hydrogen phosphate anhydrate 10%
Glycerin 20%
Lactitol 15%
10% Paratinit
Polyoxyethylene sorbitan monolaurate 1.0%
Sodium pyrophosphate 0.5%
Sodium alginate 0.5%
Fragrance 0.5%
Sodium benzoate 0.2%
Cetylpyridinium chloride 0.1%
Citric acid 0.15%
Trisodium citrate 0.1%
Yellow No. 205 0.0002%
Green 3 0.001%
Remaining water (sum of product of silicic acid oil absorption and blending amount: 26.4 (mL))

Example 8 (Suspension)
Silicic anhydride A (average particle size 4μm, oil absorption 60mL / 100g) 18%
Silicic anhydride B (average particle size 10μm, oil absorption 120mL / 100g) 20%
Glycerin 15%
Erythritol 10%
Poloxamer 407 2.0%
Fragrance 0.5%
Sodium benzoate 0.2%
Sodium carboxymethylcellulose 0.1%
Triclosan 0.3%
Disodium hydrogen phosphate 0.1%
Sodium dihydrogen phosphate 0.05%
Blue No. 1 0.00005%
Water balance

It is explanatory drawing which showed the result of the stain removal test. It is explanatory drawing which showed the fine structure of the bovine tooth enamel surface after a process. (Comparative Example 1) It is explanatory drawing which showed the fine structure of the bovine tooth enamel surface after a process. (Example 1)

Claims (3)

Silicic anhydride (A) having an average particle diameter of 1 to 5 μm and an oil absorption of 30 to 70 mL / 100 g and silicic anhydride (B) having an average particle diameter of 6 to 12 μm and an oil absorption of 100 to 130 mL / 100 g An abrasive for PMTC, which is blended and the blending ratio of silicic anhydride (A) and (B) is 1: 3 to 2: 1. Silicic anhydride (A) is blended in an amount of 10% by weight or more, silicic anhydride (B) is blended in an amount of 10% by weight or more, and the total amount of silicic anhydride (A) and (B) is 35-80% by weight. The PMTC abrasive according to claim 1, wherein: In 100 g of PMTC abrasive, silicic anhydride (A) is blended with C (g), silicic anhydride (B) is blended with D (g), and the amount of oil absorption of silicic anhydride (A) is E (mL / G), when the oil absorption of silicic anhydride (B) is F (mL / g), the sum of the product of C and E and the product of D and F is 25 to 40 mL. The abrasive for PMTC according to 1 or 2.