JP2007091636A - Composition for dental polishing use - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a pasty composition for dental polishing use for polishing the surface of ceramic, metallic or resinous dental packings or crown-restorative products, safe to human health with no surfactant such as sodium lauryl sulfate contained therein, well-rinsable in the oral cavity because of being soluble to water, and slight in scattering during making a polishing. <P>SOLUTION: The pasty composition for dental polishing use comprises 0.5-6 wt.% of at least one kind of inorganic fine powder of 4-80 nm in average particle size selected from silica fine powder, silica-alumina fine powder and silica-zirconia fine powder, 10-50 wt.% of inorganic polishing particles of 0.1-10μm in average size, 10-60 wt.% of a water-soluble liquid, 0.05-2 wt.% of a water-soluble cellulosic thickening agent and 5-60 wt.% of water. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention is applied to surface polishing of porcelain, metal or resin dental fillings and crown restorations, is safe for the human body, has little scattering during polishing, and can be easily washed away with water The present invention relates to a dental polishing composition.

  Dental fillers and crown restorations need to be polished after filling or after shape modification. Insufficient polishing or large scratches on the polished surface not only feel uncomfortable but also cause discoloration and plaque adhesion. For this reason, it is necessary to polish the surface as much as possible by polishing the polishing material containing abrasive particles until final polishing.

  As the polishing material for polishing used as the final finish, a polishing material in which abrasive grains are dispersed in wax or the like, that is, a polishing material for dental technicians is often used. However, since this abrasive material uses wax as a medium, it is very difficult to wash it with water after use. Therefore, there is a problem that abrasive materials using wax as a medium are not suitable for dental resin materials that are often used directly in the oral cavity because they are difficult to wash in the oral cavity.

  Conventionally, there has been a polishing cleanser whose main component is an abrasive powder (see, for example, Patent Document 1). However, when this cleanser is dissolved in water and used as a paste, there is a problem that the paste easily scatters, particularly when a Robinson brush or the like is used, so that it jumps on the operator's or patient's face or clothing. In order to suppress splashing, the amount of water is reduced or simply adding a thickener does not reduce splashing. On the other hand, the operability and flow during washing are very poor, so wash away with water after use. There was a problem that would become difficult.

  Some of them contain a surfactant such as sodium lauryl sulfate for ease of polishing and easy washing with water (see, for example, Patent Documents 1, 2, and 3). However, since surfactants have a high transdermal absorption action and carcinogenicity, they should not be used for abrasives used in the oral cavity even in extremely small amounts.

JP-A-52-133306 JP-A-54-112907 JP-A-8-71088

  Accordingly, the present invention is safe for the human body, free of surfactants such as sodium lauryl sulfate, in the surface polishing of dental fillings and crown restorations made of porcelain, metal or resin, and is water-soluble and intraoral It is an object of the present invention to provide a paste-like dental polishing composition that has a good flow at the time of washing with water and has little scattering during polishing.

  As a result of intensive studies to solve the above-mentioned problems, the present inventors have found that inorganic abrasive particles are added to a medium in which water and a water-soluble liquid are combined with a water-soluble cellulose thickener and a specific inorganic fine powder as a thickener. The present invention was completed by investigating that the above problems could be solved by using a blended dental polishing composition.

  That is, the present invention relates to at least one inorganic fine powder selected from silica fine powder, silica-alumina fine powder, and silica-zirconia fine powder having an average particle diameter of 4 to 80 nm: 0.5 to 6% by weight, average particle Inorganic abrasive particles having a diameter of 0.1 to 10 μm: 10 to 50% by weight, water-soluble liquid: 10 to 60% by weight Water-soluble cellulose thickener: 0.05 to 2% by weight, water: 5 to 60% by weight %, A paste-like dental polishing composition characterized by comprising:

  In the present invention, the cellulosic thickener to be used is preferably at least one selected from sodium carboxymethyl cellulose, hydroxypropyl cellulose, and cellulose ester, and the water-soluble liquid is ethanol, 1-propanol, 2-propanol, It is at least one selected from 2-methyl-2-propanol, glycerol, diglycerol, polyglycerol, propylene glycol, dipropylene glycol, polypropylene glycol, sorbitol, mannitol, ethylene glycol, diethylene glycol, polyethylene glycol, polyethylene glycol monomethyl ether It is a preferable paste-like dental polishing composition.

  The dental polishing composition according to the present invention is a dental polishing composition that does not contain a surfactant that may cause adverse effects on the human body, and is water-soluble and has a good flow when washed in the oral cavity. It is an excellent paste-like dental polishing composition with little scattering of time.

  The inorganic abrasive particles having an average particle size of 0.1 to 10 μm used in the present invention cannot obtain a sufficient polishing effect if the average particle size is smaller than 0.1 μm, and a polishing effect can be obtained if the particle size exceeds 10 μm. At the same time, the operability of polishing also decreases. The inorganic abrasive particles are blended in the composition in an amount of 10 to 50% by weight, more preferably 10 to 30% by weight. If it is less than 10% by weight, the polishing efficiency is lowered, and if it exceeds 50% by weight, the viscosity of the composition becomes too high.

  As the inorganic abrasive particles, diamond particles, zinc oxide particles, alumina particles, etc. can be freely used depending on the object to be polished, but among the dental resins, diamond that can be sufficiently polished especially for dental hard resins. It is preferable to use particles.

  At least one inorganic fine powder selected from silica fine powder, silica-alumina fine powder, and silica-zirconia fine powder having an average particle diameter of 4 to 80 nm used in the present invention is a water-soluble cellulose-based thickener described later. In combination, the dental polishing composition is provided with an appropriate operability, and it is blended in order to obtain a dental polishing composition that has a good flow during washing and little scattering during polishing. At least one inorganic fine powder selected from the silica fine powder, silica-alumina fine powder, and silica-zirconia fine powder needs to have an average particle diameter of 4 to 80 nm. Viscosity, that is, operability cannot be imparted, and if the particle diameter exceeds 80 nm, scattering during polishing cannot be suppressed.

  Further, at least one inorganic fine powder selected from silica fine powder, silica-alumina fine powder, and silica-zirconia fine powder having an average particle diameter of 4 to 80 nm is blended in the composition in an amount of 0.5 to 6% by weight. More preferably, it is 1 to 4% by weight. If it is less than 0.5% by weight, a sufficient thickening effect cannot be obtained, and scattering of the composition cannot be suppressed. If it exceeds 6% by weight, the viscosity of the composition becomes too high and the operability during use is lowered.

  The water-soluble cellulosic thickener can give the above-described excellent characteristics to the composition when used in combination with the specific inorganic fine powder. In the dental polishing composition according to the present invention, the water-soluble cellulose thickener is at least one selected from sodium carboxymethyl cellulose, hydroxypropyl cellulose, and cellulose ester because it can be expected to exhibit the most characteristics. It is preferable.

  Further, the water-soluble cellulose thickener is mixed in the composition in an amount of 0.05 to 2% by weight, more preferably 0.05 to 1% by weight. If it is less than 0.05% by weight, the effect cannot be obtained and the composition tends to scatter when used, and if it exceeds 2% by weight, the viscosity of the composition increases and the operability during polishing deteriorates. It is not suitable because the flow of the water gets worse.

  Water has the effect of improving the flow of the composition during washing, and is added to give the water-soluble cellulose thickener a thickening action. In the present invention, 5 to 60% by weight of water is blended in the composition, preferably 10 to 50% by weight. If it is less than 5% by weight, the flow at the time of washing with water becomes worse, and the effect of imparting a thickening action to the water-soluble cellulosic thickener becomes low. On the other hand, when it exceeds 60% by weight, even when other components are adjusted, it becomes impossible to suppress scattering during polishing of the composition.

  When used with water, the water-soluble liquid has an effect of imparting an appropriate viscosity to the dental polishing composition and improving operability during polishing. Water-soluble liquids can be used without any particular limitation, but ethanol, 1-propanol, 2-propanol, 2-methyl-2-propanol, glycerin, diglycerin, poly (polyethylene), which are liquids at normal temperatures without harming the human body. It is preferably at least one selected from glycerin, propylene glycol, dipropylene glycol, polypropylene glycol, sorbitol, mannitol, polyethylene glycol, polyethylene glycol monomethyl ether, and particularly at least one of glycerin, propylene glycol, and polypropylene glycol. Even if a surfactant is not used, the flow during washing with water is good, and the effect of suppressing scattering during polishing is high, which is more preferable.

  In the present invention, the water-soluble liquid is blended in the composition in an amount of 10 to 60% by weight, preferably 20 to 60% by weight. If it is less than 10% by weight, scattering during polishing cannot be suppressed, and if it exceeds 60% by weight, the polishing efficiency is inferior, so this is not suitable.

  Of course, additives such as a fragrance, a sweetener, a preservative and a colorant may be optionally added to the dental polishing composition according to the present invention as long as the properties thereof are not affected.

  Table 1 shows the compositions of Examples 1 to 4 and Comparative Examples 1 to 3.

Comparative Examples 4 and 5
As Comparative Example 4, a commercially available dental polishing material (manufactured by S Company) with increased fluidity and improved operability during polishing was used. As Comparative Example 5, a commercially available dental polish (manufactured by Company C) in which the viscosity of the composition was increased to prevent scattering was used.

  The dental polishing compositions of Examples 1 to 4 and Comparative Examples 1 to 4 were tested for polishing properties, scattering, flow during water washing, and fluidity of the compositions.

<Abrasive evaluation>
A disk-shaped cured body (diameter: 15 mm, height: 1.5 mm) is prepared with a composite resin for restoration of restoration (trade name: Solare, manufactured by GC Corporation), and the surface of the cured body is polished with water-resistant abrasive paper # 600. 0.05 g of the dental polishing composition of each Example and Comparative Example was applied, and polishing was performed with a Robinson brush (manufactured by Buffalo) under conditions of polishing time: 30 seconds and rotation speed: 5000 rpm. This test piece was washed with water, and the gloss was measured with a gloss meter (product name: Gloss meter VG2000, manufactured by Nippon Denshoku Industries Co., Ltd.), and the polishing property was evaluated according to the following criteria. The results are summarized in Table 1.
Glossiness exceeds 70% ◎
Glossiness 55-70% ○
Glossiness 35-55%
Less than 35% gloss ×

<Evaluation of scattering>
0.05 g of each of the dental polishing compositions of Examples and Comparative Examples was put out on paper, and a Robinson brush (Buffalo) rotating at 5000 rpm was pressed for 10 seconds. At that time, marks were marked at locations where it could be confirmed that they were visually scattered on the paper, and the number of marks was regarded as the number of scattering, and evaluation was performed according to the following criteria. The results are summarized in Table 1.
4 or less ◎
5-15 pieces ○
16-30 pieces △
31 or more ×

<Evaluation of flow during washing>
0.3 g of the dental polishing composition of each Example and Comparative Example was placed on a dental kneaded paper (No. 22, manufactured by GC Corporation) and pressed with a glass plate to expand it into a circle having a radius of about 1 cm. On this kneaded paper, tap water was poured under the same conditions so as not to directly hit the abrasive, and the removability of the paste was evaluated according to the following criteria. The results are summarized in Table 1.
Abrasive material is completely washed away ◎
Less than one third of abrasives ○
Less than half of the abrasive material △
More than half of abrasives remaining ×

<Evaluation of fluidity of composition>
After leaving the dental polishing composition of each Example and Comparative Example in a constant temperature dark room at 23 ° C. for 50 minutes, 0.5 cc is filled into a glass tube having an inner diameter of 10 mm, and extruded onto a glass plate on which cellophane is laid. Put cellophane. In this state, a weight of 840 gg including the glass plate was applied perpendicularly to the sample for 30 seconds, and after removing the load, the dimensions of the maximum and minimum parts between the parallel tangents of the sample that had spread were measured, Evaluated by criteria. The results are summarized in Table 1.
Average value 45mm or more ◎
Average value 40-45mm ○
Average value 35-40mm △
Average value less than 35mm ×

CMC: Sodium carboxymethyl cellulose (trade name: Cellogen HF-600F, manufactured by Daiichi Kogyo Seiyaku Co., Ltd.)
Powder 1: Silica fine powder (trade name: A200, manufactured by Nippon Aerosil Co., Ltd., average particle size 16 nm)
Powder 2: Silica-alumina fine powder (trade name: MOX170, manufactured by Nippon Aerosil Co., Ltd., average particle size of 15 nm)
Diamond abrasive: (Product name: Genesis KMm, manufactured by Matsumoto Yushi Seiyaku Co., Ltd., average particle size 2 μm)

  As is clear from each example, the dental polishing composition according to the present invention does not contain a surfactant that may cause adverse effects on the human body, has a good flow when washed with water, and has excellent dents with little scattering during polishing. It turns out that it is polishing composition. On the other hand, Comparative Example 1 contains a large amount of water-soluble cellulose-based thickener, so the flow and fluidity during washing is poor, and Comparative Example 2 does not use a water-soluble cellulose-based thickener, so scattering occurs. Many. Since Comparative Example 3 does not contain at least one inorganic fine powder selected from silica fine powder, silica-alumina fine powder, and silica-zirconia fine powder, there is much scattering.

Claims (3)

At least one inorganic fine powder selected from silica fine powder, silica-alumina fine powder, silica-zirconia fine powder having an average particle diameter of 4 to 80 nm: 0.5 to 6% by weight,
Inorganic abrasive particles having an average particle size of 0.1 to 10 μm: 10 to 50% by weight,
Water-soluble liquid: 10 to 60% by weight
Water-soluble cellulose thickener: 0.05-2% by weight,
Water: 5 to 60% by weight
A paste-like dental polishing composition comprising:   The paste-like dental polishing composition according to claim 1, wherein the cellulosic thickener is at least one selected from sodium carboxymethylcellulose, hydroxypropylcellulose, and cellulose ester.   Water-soluble liquid is ethanol, 1-propanol, 2-propanol, 2-methyl-2-propanol, glycerin, diglycerin, polyglycerin, propylene glycol, dipropylene glycol, polypropylene glycol, sorbitol, mannitol, polyethylene glycol, polyethylene glycol The paste-like dental polishing composition according to claim 1 or 2, which is at least one selected from monomethyl ether.