阅读说明：本技术 牙齿的美白方法 (Method for whitening teeth ) 是由 西尾秀俊 于 2020-04-28 设计创作，主要内容包括：本发明的课题在于提供一种为了提高牙齿的美白效果而在适当条件下进行研磨等的方法。本发明中,使用下述牙齿的美白方法,其中,使用由表面具有凹凸的树脂或树脂组合物构成的磨牙构件、和分散或溶解于凝胶状介质中的柠檬酸或柠檬酸金属盐,按照编号顺序进行下述步骤1～3。[步骤1]在齿面上涂布柠檬酸或柠檬酸金属盐1％～73％的凝胶；[步骤2]利用37度～45度的温热板温热3分钟以上；[步骤3]利用上述磨牙构件一边去除上述凝胶一边进行摩擦。(The present invention addresses the problem of providing a method for polishing teeth under appropriate conditions in order to improve the whitening effect of the teeth. In the present invention, a tooth whitening method is used in which the following steps 1 to 3 are performed in the order of the numbers using a tooth grinding member made of a resin or a resin composition having irregularities on the surface and citric acid or a citric acid metal salt dispersed or dissolved in a gel-like medium. Step 1, coating 1-73% of citric acid or citric acid metal salt gel on the tooth surface; step 2, heating for more than 3 minutes by using a 37-45 ℃ warm plate; step 3 rubbing the teeth grinding member while removing the gel.)

1. A method for whitening teeth, which comprises the steps of using a tooth grinding member comprising a resin or a resin composition having irregularities on the surface thereof and citric acid or a citric acid metal salt dispersed or dissolved in a gel-like medium, and performing the following steps 1 to 3 in the order of the numbers,

step 1, coating 1-73% of citric acid or citric acid metal salt gel on the tooth surface;

step 2, heating for more than 3 minutes by using a 37-45 ℃ warm plate;

step 3 rubbing is performed while removing the gel using the dental grinding member.

2. The method of whitening teeth according to claim 1, wherein an agent comprising apatite is dispersed or dissolved in the gel-like medium.

3. The method of whitening teeth according to claim 1 or 2, wherein the molar member comprises melamine foam.

Technical Field

The present invention relates to a method for whitening teeth, and more particularly, to a method for whitening teeth using a tooth polishing tool.

Background

In the whitening of teeth, the following whitening has been conventionally performed: tooth enamel proteins are dissolved by using hydrogen peroxide to whiten teeth, thereby accompanying demineralization of tooth surfaces (patent document 1).

In addition, regardless of the whitening effect, in any case, it is effective to polish teeth during whitening of teeth, and since melamine foam, which is a foam of melamine resin, can effectively remove dirt adhering to various objects by the fine uneven surface on the surface, it is studied to use it as a tooth polishing tool for relatively easily removing stains such as yellow stains, smoke stains, and the like adhering to the tooth surface, which are difficult to remove by a general toothbrush.

As an example of a tooth polishing tool for whitening teeth, there is a tooth polishing tool including a grip portion, a support portion extending from the grip portion, and a tooth grinding member attached to the support portion, the tooth grinding member being made of compressed melamine foam in which the ratio of the number of partition walls of a surface parallel to a grinding surface to the number of partition walls of a surface perpendicular to the grinding surface is 1/3 to 1/5 (patent document 2).

However, patent document 1 discloses no description about the decomposition of coloring matter attached to the vicinity of the surface of a tooth because whitening is performed by demineralization of the surface of the tooth, and patent document 2 discloses only a sufficient degree of immersion of a tooth grinding member made of melamine foam in water as a condition for performing whitening of the tooth, and does not make detailed studies on a medicament used together with the tooth grinding member, a method for performing whitening, and the like.

Documents of the prior art

Patent document

Patent document 1: japanese patent laid-open publication No. 2014-152166

Patent document 2: japanese patent laid-open publication No. 2007 and 202809

Disclosure of Invention

Problems to be solved by the invention

Even when a polishing member having a high polishing effect is used as described above, the whitening effect sufficient for the user may not be obtained. Therefore, there is a need for developing a method for improving the tooth whitening effect.

Means for solving the problems

The present inventors have found that, in order to solve the above problems, by a tooth whitening method for whitening teeth using a tooth grinding member made of a resin or a resin composition having irregularities on the surface and citric acid, the citric acid dispersed or dissolved in a gel is brought into contact with a coloring matter between the enamel pillars in an activated state for a certain period of time, thereby removing the coloring matter between the enamel pillars which is not normally removed, and obtaining a tooth whitening effect, particularly an effect of reducing the degree of staining and improving the degree of whiteness, and have completed the present invention.

The whitening method of the present invention includes at least the following (1) to (3).

(1) A tooth whitening method using a tooth grinding member comprising a resin or a resin composition having irregularities on the surface thereof and citric acid or a citric acid metal salt dispersed or dissolved in a gel-like medium, wherein the following steps 1 to 3 are performed in the order of the numbers.

Step 1, coating 1-73% of citric acid or citric acid metal salt gel on the tooth surface;

step 2, heating for more than 3 minutes by using a 37-45 ℃ warm plate;

step 3 rubbing the tooth surface with the tooth grinding member to remove the gel and rub the tooth surface.

(2) The method for whitening teeth according to item (1), wherein an agent containing apatite is dispersed or dissolved in the gel medium.

(3) The method for whitening teeth according to the above (1) or (2), wherein the tooth-grinding member comprises melamine foam.

ADVANTAGEOUS EFFECTS OF INVENTION

By using the method for whitening teeth of the present invention, natural colors of teeth can be whitened by removing coloring substances, and in addition, by selecting a drug to be used simultaneously and adjusting conditions, a whitening effect with high whiteness can be obtained, and the whitening effect of teeth can be further improved.

More specifically, the mechanism of action is presumed as follows.

The coloring matter between the enamel rods is fixed to the teeth by binding or mixing with a protein which is a protein bound to calcium ions.

Citric acid or a chelating agent such as an ion thereof is known to have an action of improving the degradability of a specific protein such as a blood coagulation inhibiting effect, and also to increase the solubility or the like by chelating calcium ions contained in one kind of protein as a coloring matter substance in whitening teeth, so that the protein is hard to be fixed and the coloring matter substance is easy to be removed.

In addition, the tooth whitening method of the present invention is different from the conventional tooth whitening method using hydrogen peroxide with demineralization of the tooth surface, and thus the conventional whitening method can be performed after removing coloring substances by the whitening method of the present invention. Therefore, when the whitening method of the present invention is used in the pretreatment of the conventional whitening method, it is possible to prevent coloring matter from being mixed into tooth surface components formed by remineralization after demineralization, and to further improve the whitening effect of teeth.

That is, in the whitening method of the present invention, a whitening effect can be obtained by a whitening method using a different effect from the conventional one, or a whitening method combining the above effects with the conventional one.

Drawings

Fig. 1 is a view showing the results of measuring the degree of staining of a crown and a root by a whitening effect measuring instrument.

Detailed Description

Embodiments of the whitening method of the present invention are shown below. However, the embodiment of the whitening method of the present invention is not limited to the following embodiment.

[ embodiment 1]

Embodiment 1 as an example of the embodiment of the present invention is a tooth whitening method sequentially performing: a process of applying a gel-like medium to teeth using a dental polishing tool having a tooth-grinding member composed of a resin or a resin composition having irregularities, and citric acid or a metal citrate in a state of being mixed with or dissolved in the gel-like medium; heating the coated gel and the surface of the tooth; and a treatment of removing the gel after keeping the temperature for a certain period of time in a heated state.

< resin or resin composition having concavities and convexities >

In the whitening method of the present invention, teeth are polished using a resin or resin composition having irregularities.

Examples of the resin include urethane resin, melamine resin, polyester resin, and acrylic resin, and melamine foam, which is a foam of melamine resin, is preferable.

The irregularities may be formed by a cross section of the pores, may be formed by dispersing other materials in the resin, or may be formed by molding the surface of the resin. In order to prevent the state of the irregularities from being largely changed by surface abrasion, it is preferable that the irregularities are formed by cutting the cross section of small holes existing in the cross section.

< chelating agent >

In the whitening method of the present invention, the chelating agent is preferably citric acid or a citrate. Further, citric acid or citric acid sodium salt is particularly preferable. However, the chelating agent is not limited to citric acid, and other chelating agents may be used instead of or in combination with citric acid within a range not to impair the object of the present invention.

As an example of the chelating agent, a substance such as citric acid in which a group forming a ligand is a carboxyl group is preferable.

When a chelating agent which does not adversely affect the human body such as toxicity or carcinogenicity is used, it is removed as appropriate so as not to adversely affect the human body, and the chelating agent is appropriately disposed so as not to enter the body.

In the whitening method of the present invention, citric acid is used to chelate calcium ions. Citric acid originally has a blood coagulation inhibiting effect, but proteins and the like which are components of tooth coloring substances also contain calcium, and it is considered that the chelate formation of calcium ions is effective for removing coloring substances.

The whitening method of the present invention is used for removing a coloring matter between glaze pillars which is not usually removed by bringing citric acid dispersed or dissolved in a gel into contact with the coloring matter between glaze pillars in an activated state for a certain period of time.

The citric acid can be metal salt. In the present invention, citric acid is used in the form of particles dispersed in a gel or dissolved in a gel.

The action of citrate such as citric acid and sodium citrate on teeth can release the connection of coloring substances on the tooth surface by utilizing the characteristics of citric acid and citrate ions.

Further, the activity of citrate ions can be increased by heating the tooth to 37 to 45 degrees in a state where citric acid or citrate is applied to the tooth.

< gel >

The gel used in the whitening method of the present invention is not particularly limited as long as it can be applied to teeth in the oral cavity. For example, the gel disclosed in Japanese patent laid-open publication No. 2016-104777 can be used.

In the present invention, the gel dissolves or mixes the whitening agent for teeth to disperse the whitening agent in the medium.

The gel used in the whitening method of the present invention contains, for example, polyvinylpyrrolidone, ethylene oxide, propylene oxide, and copolymers thereof. In addition, the gel used in the present invention may contain a thickener to adjust viscosity. Any orally acceptable thickening agent may be used, without limitation, including carbomers, also known as carboxyvinyl polymers, carrageenans, also known as irish moss and more particularly carrageenan (iota carrageenan), cellulosic polymers such as high molecular weight polyethylene glycols, hydroxyethylcellulose, carboxymethylcellulose (CMC) and salts thereof, natural rubbers such as CMC sodium, karaya gum, xanthan gum, gum arabic and tragacanth, colloidal magnesium aluminum silicate, and colloidal and/or fumed silicas and mixtures thereof.

In various preferred specific examples of the whitening method of the present invention, a carrier is contained in the gel, and citric acid, a chelating agent such as citric acid, and other components are dissolved or dispersed in the gel. Such carriers include polymers and/or copolymers of polyethylene glycol, ethylene oxide/propylene oxide, and silicones. If such copolymers/polymers are used, they may be selected from commercially available materials. Block copolymers of ethylene oxide/propylene oxide are useful, but higher molecular weights, e.g., >5000Da, are preferred. In addition, low or medium molecular weight polyethylene glycols, such as PEG 400, PEG 600, PEG 800, PEG 1000, and mixtures thereof are also useful. Preferably, the carrier imparts a viscosity of about 10,000CPS to about 700,000CPS, preferably about 30,000CPS to about 300,000CPS to the dentifrice.

< teeth grinding Member >

The tooth grinding member in the present invention is composed of a resin or a resin composition.

The molar member may be of any shape as long as it does not interfere with the purpose of the invention.

The molar member has irregularities on the surface. The asperities may have a cross section of pores arranged on the surface. In this case, the small holes are partitioned by partitions of the resin or resin composition, and the convex portions of the surface of the molar member are cross-sections of the partitions.

Examples of the tooth-grinding member used in the present invention include nonwoven fabrics formed of urethane resin, urea resin, nylon, silicone, acrylic resin, PVA resin, or the like, leather, hemp, sisal, felt, polyester yarn, or the like. Among them, the tooth-grinding member in the present invention is preferably a thermosetting resin such as melamine foam or urethane foam.

< Melamine foam or urethane foam >

In the whitening method of the present invention, the resin or resin composition having the concavities and convexities may include melamine foam. Melamine foam can be used as a tooth grinding member (tooth grinding material) and has high grinding ability because it grinds teeth while thinly grinding the surface thereof.

The melamine foam in the present invention is not particularly limited insofar as it does not interfere with the object of the present invention, and melamine foams used for various purposes as cleaning members and polishing members can be used as long as they satisfy the conditions of hardness, elasticity, number and size of porous pores, and the like.

A compressed melamine foam produced by heating a melamine foam having a hollow portion partitioned by partition walls and applying a compressive force in the thickness direction thereof may be used. For example, melamine foams obtained by the methods described in Japanese patent application laid-open Nos. 2002-172638 and 2002-201299 may be mentioned. In the compressed melamine foam, a surface having fine irregularities parallel to the compression surface of the compressed melamine foam is used as the grinding surface of the teeth.

The thickness of the partition wall on the surface (side surface) perpendicular to the polished surface is about the same as the thickness of the partition wall on the polished surface.

Further, a melamine foam which is generally commercially available as a cleaning member may be used. Further, depending on the whitening conditions such as the size of citric acid or citrate particles, melamine foam having a larger number of cells than those of general commercial products, for example, 300 to 350/25mm in cell count, may be used.

< teeth grinding tool >

There is no limitation as long as the whitening agent in the form of a gel can be heated and removed after the treatment.

A tooth polishing tool having safety to prevent scalding due to excessive heating is preferable.

The tooth polishing tool removes coloring matter contained in a glaze column sheath between glaze columns by polishing and heating with a tooth polishing member. When the coloring substance is an organic polymer (protein), calcium ions required for coagulation can be chelated to inhibit coagulation.

[ embodiment 2]

Embodiment 2, which is an example of a modification of the embodiment of the present invention, is a tooth whitening method in which, after the following treatments are sequentially performed, a chemical agent containing hydrogen peroxide is further applied to the tooth surface to whiten the tooth, and remineralization of the tooth with a reagent containing apatite is further performed, the treatments being: a process of applying a gel-like medium to teeth using a dental polishing tool having a tooth-grinding member composed of a resin or a resin composition having irregularities, and citric acid or a metal citrate in a state of being mixed with or dissolved in the gel-like medium; heating the coated gel and the surface of the tooth; and a treatment of removing the gel after keeping the temperature for a certain period of time in a heated state.

When proteins, which are coloring substances dispersed on the surface of enamel pillars, enamel pillar sheaths, or the like, are removed by citric acid and remineralization is performed after demineralization of the tooth surface, the whiteness of the remineralized tooth surface can be further improved by preventing the coloring substances from entering the remineralized layer.

< reagent containing apatite >

The whitening method of the present invention may be a method in which the agent containing apatite is mixed with the gel medium or a method in which the agent containing apatite is dissolved in the medium. The whitening effect can be further improved by the remineralization of apatite.

As the apatite, known apatite can be used as long as the object of the present invention is not impaired.

Examples of the apatite used in the whitening method of the present invention include natural or artificial hydroxyapatite, and the apatite has a tooth remineralization effect, thereby restoring the tooth surface and enhancing the whiteness. In order to further compensate for the whiteness of the tooth surface, a suitable amount of a pigment or pigment having whiteness and little harm, such as titanium oxide, may be added to the agent containing apatite.

[ embodiment 3]

Embodiment 3, which is an example of a modification of the embodiment of the present invention, is a whitening method including dispersing citric acid or citrate as fine particles smaller than the distance between glaze columns in a gel.

Citric acid or citrate is not dissolved in a component present in the enamel pillar sheath, and citric acid or citrate as an active ingredient acts to physically intrude into the gaps of the enamel pillar, and in addition to further promoting the decomposition of proteins, the polishing effect of the tooth surface is improved by fine particles having an appropriate hardness.

The size of the fine particles of citric acid or citrate is smaller than the distance between the glaze pillars in general and is a size that can be pushed into the tooth-grinding member, and is 0.1 μm or less, preferably 0.05 μm or less, and more preferably 0.025 μm or less.

Example 1

The following illustrates embodiments of the present invention. The present invention is not limited to the following examples.

[ examples ]

A gel of citric acid 50% is applied to the tooth surface of the part containing the tooth roots and crowns. Next, the gel-coated portion was warmed with a 40 ℃ warm plate for 5 minutes. Thereafter, rubbing was performed with melamine foam while removing the citric acid gel.

After wiping off citric acid from the tooth surface using melamine foam, the resultant was measured with a device for inspecting coloring property (color measuring instrument for whitening, SHADE UP Navi, model name SSN-1, manufactured by Kabushiki corporation), and it was confirmed that coloring matter was removed and the degree of coloring was lowered. Fig. 1 is a graph showing the results of the decrease in the degree of staining of crowns and roots from a4 to a3.5 before and after the whitening treatment.

As described above, it was confirmed that the tooth whitening method of the present invention can reduce the tooth staining degree and obtain a whitening effect. More specifically, as shown in fig. 1 below, it was confirmed that before and after whitening by the whitening method of the present invention, the coloring degree of both the crown and the root was reduced, and the whiteness of the tooth was visually improved.

Industrial applicability

The tooth whitening method of the present invention can effectively whiten teeth and make teeth look beautiful, and therefore can be used in a clinic for cosmetology and dentistry.