JP2003040753A - Dental bleaching agent and bleaching method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a method for bleaching with which no external equipment such as a light illuminator, a heater, etc., is required, no high technique is required in treatment of tooth bleaching and a person to the treated does not have a pain. SOLUTION: This dental bleaching agent is obtained by mixing activated carbon powder with a compound to generate hydrogen peroxide in an aqueous solution. The dental bleaching agent is adhered to the teeth surfaces to bleach the teeth surfaces. Activated carbon is brought into contact with hydrogen peroxide to generate active oxygen and the teeth are bleached by generated active oxygen.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a dental bleaching agent and a bleaching method for bleaching teeth that have been discolored due to pigment deposition and the like.

[0002]

2. Description of the Related Art Tooth discoloration is roughly classified into extrinsic ones caused by smoking, drinking tea, adhesion of pigment-producing bacteria, and endogenous ones caused by aging, metabolic disorders, etc. Also, it is desired to bleach the teeth to whiten the surface.
For this reason, in dentistry, a treatment for bleaching teeth has been conventionally performed.

Tooth bleaching in conventional dental practice is
A hydrogen peroxide solution is used. After cleaning the tooth surface and the gingiva around the tooth, paraffin for protection is applied to the gingiva, and then a phosphoric acid solution is applied to the tooth surface for etching. 30-35% after this etching is completed
The aqueous solution of hydrogen peroxide at high concentration is added to gauze and the tooth surface is stretched to bleach. After the bleaching is finished, it is carried out by removing the paraffin and hydrogen peroxide solution by rinsing.

However, in this bleaching method, the process until the transition to bleaching is long and not only does it cause pain to the subject, but since a high-concentration hydrogen peroxide solution is used, the treatment with due consideration to safety is required. Is needed.

On the other hand, as a conventional tooth bleaching method using a low concentration hydrogen peroxide solution, Japanese Patent Laid-Open No. 11-9
It is disclosed in Japanese Patent No. 2351. This method has a concentration of 3
% Hydrogen peroxide solution or its paste is kneaded with titanium dioxide powder as a photocatalyst, and the mixture is applied to the surface of the tooth, and the applied portion is irradiated with light to bleach. . In this method, titanium dioxide exerts a catalytic action by light energy based on light irradiation, so that decomposition of hydrogen peroxide is promoted to generate active oxygen, and the tooth surface is bleached by the oxidizing power of active oxygen. You can

[0006]

However, in bleaching using a photocatalyst, an external device such as a light irradiator for irradiating the coated portion with light is required, and the practitioner side needs capital investment for that purpose. Has become.

Further, in order to obtain a uniform bleaching effect, it is necessary to uniformly irradiate the tooth surface with light. For this purpose, not only a practitioner is required to have a high level of skill,
Since the fixed posture is also required for the subject for a long time, the subject is in pain.

The present invention has been made in consideration of the above conventional problems, and does not require an external device such as a light irradiator, and does not require a high-level technique. It is an object of the present invention to provide a dental bleaching agent and a bleaching method capable of bleaching teeth without giving pain to a person.

[0009]

The dental bleaching agent according to the invention of claim 1 is a dental bleaching agent for bleaching a tooth surface.
It is characterized in that the carbon-containing powder and the compound that generates hydrogen peroxide in an aqueous solution are mixed and used by being attached to the tooth surface.

When the charcoal-containing powder is mixed with a compound that generates hydrogen peroxide in an aqueous solution, the hydrogen peroxide comes into contact with the charcoal-containing powder, and this contact causes the peroxidation even without light irradiation or heat supply. The decomposition reaction of hydrogen is accelerated. Active oxygen is generated by this decomposition reaction, and the generated active oxygen decomposes the organic substances on the tooth surface to bleach the tooth surface.

In such an invention, the generated hydrogen peroxide may have a low concentration, and further, the irradiation of light and the heating for the generation of hydrogen peroxide and the generation of active oxygen are not required, and the practitioner is required to have a high technology and equipment investment. Is not required. Further, since the charcoal-containing powder has no adverse effect on the living body and the hydrogen peroxide generated from the compound has a low concentration, safety can be secured.

The invention according to claim 2 is the dental bleaching agent according to claim 1, characterized in that a thickener is mixed with a compound which generates hydrogen peroxide in an aqueous solution.

The viscosity can be easily adjusted by mixing the thickener. Therefore, the viscosity can be adjusted so that it can be easily attached to the tooth surface, and the usability is improved. Further, the amount of adhesion to the tooth surface and the adhesion time can be adjusted according to the degree of discoloration of the tooth surface and the required degree of bleaching.

The invention according to claim 3 is the invention according to claim 1 or 2, wherein the carbon-containing powder is carried on a sheet body, and the sheet body is impregnated with the compound for generating hydrogen peroxide. It is characterized by being

By impregnating the sheet body with a compound that generates hydrogen peroxide, the compound comes into contact with the carbon-containing powder carried on the sheet body, and the decomposition reaction is promoted as in the first aspect. Therefore, the tooth surface can be bleached by the generated active oxygen. Further, in the present invention, since the bleaching can be performed only by sticking the sheet body to the tooth surface, the bleaching operation is further facilitated.

The invention of claim 4 is the dental bleaching agent according to any one of claims 1 to 3, wherein the carbon-containing powder is activated carbon powder.

Since activated carbon powder has a large catalytic action, by using activated carbon powder as the carbon-containing powder,
It is possible to further promote the decomposition reaction of hydrogen peroxide and smoothly generate active oxygen. Therefore, the tooth surface can be bleached more favorably.

The bleaching method of the invention of claim 5 is the method of claim 1,
The dental bleaching agent described in 2 or 4 is characterized in that the state of being adhered to the tooth surface is continued for a predetermined time.

As described above, the dental bleaching agent according to claim 1, 2 or 4 is adhered to the tooth surface, and the adhering state is continued for a predetermined time, whereby active oxygen due to the decomposition reaction of hydrogen peroxide is applied to the tooth surface. It can be operated continuously.
Therefore, the tooth surface can be surely bleached without causing pain to the subject.

The bleaching method of the invention of claim 6 is characterized in that the dental bleaching agent of claim 3 or 4 is kept attached to the tooth surface for a predetermined time.

According to the present invention, the sheet body supporting the carbon-containing powder and impregnated with the hydrogen peroxide-generating compound is stuck to the tooth surface, and the stuck state is continued for a predetermined time. Can be continuously applied to the tooth surface, and the tooth surface can be surely bleached without causing pain to the subject. Further, in the present invention, since it is only necessary to attach the sheet member to the tooth surface, it is possible to easily bleach the teeth.

[0022]

BEST MODE FOR CARRYING OUT THE INVENTION The present invention will be described in more detail below.

The bleaching agent of the present invention contains a compound that generates hydrogen peroxide in an aqueous solution and a carbon-containing powder as active ingredients.

Examples of compounds that generate hydrogen peroxide in the aqueous solution (hereinafter referred to as hydrogen peroxide-generating compounds) include aqueous hydrogen peroxide solution, aqueous urea peroxide solution, aqueous sodium peroxide solution, and aqueous barium peroxide solution. Can be used.

When an aqueous solution of hydrogen peroxide is used as the hydrogen peroxide generating compound, a commercially available aqueous solution having a low concentration of about 3% is preferable. Such a low-concentration aqueous hydrogen peroxide solution has little effect on the human body and can be safely used. Even at such a low concentration, the surface of the tooth can be bleached because the carbon-containing powder smoothly decomposes to generate the required amount of active oxygen.
Furthermore, since it is marketed as oxidol, it is easily available. The hydrogen peroxide solution is 1
It is also possible to use high concentrations such as 0%, 30%, 35%.

The hydrogen peroxide-generating compound can be used as it is for bleaching teeth, but it may be mixed with a thickener. Since the viscosity can be adjusted by mixing the thickener, it can be used in a paste or gel state.

Thus, the viscosity of the hydrogen peroxide generating compound can be adjusted according to the tooth surface condition such as the degree of discoloration and the required degree of bleaching. Further, by providing a certain degree of viscosity, the fluidity is reduced, application to the tooth surface is facilitated, and the runoff from the tooth surface is reduced, so effective bleaching can be performed.
The mixing ratio of the thickening agent is appropriately changed depending on the usage mode on the tooth surface, the thickening action of the thickening agent used, and the like.

Examples of the thickener include inorganic clay minerals such as montmorillonite, kaolin, talc and bentonite, organic thickeners such as xanthan gum, propylene glycol and silica, phosphoric acid compounds such as hydroxyapatite and calcium triphosphate or phosphoric acid. Etc. can be used. It is also possible to mix and use a plurality of these thickeners.

The charcoal-containing powder may be any powder containing powdered charcoal, and may be charcoal powder alone or a mixture of charcoal powder and other powder such as titanium dioxide or clay. Activated carbon can be selected as the carbon-containing powder.

When the charcoal-containing powder such as activated carbon and the hydrogen peroxide generating compound come into contact with each other, the hydrogen peroxide comes into contact with the charcoal-containing powder, and this contact promotes the decomposition reaction of hydrogen peroxide to generate active oxygen. To do. Active oxygen has a strong oxidizing power that decomposes organic substances into carbon dioxide gas. Therefore, by applying a mixture of a hydrogen peroxide-generating compound and a charcoal-containing powder to the tooth surface, stains and pigments on the tooth surface can be strongly decomposed, and the discolored tooth surface can be bleached. it can.

When activated carbon is selected as the carbon-containing powder, the particle size of the activated carbon powder is not particularly limited as long as it can generate hydrogen peroxide and active oxygen by contact with a hydrogen peroxide generating compound. Not something
For example, it can be appropriately selected within the range of 1 to 100 μm.

The mixing ratio of the hydrogen peroxide generating compound to the activated carbon powder is also the same, and is appropriately selected within a range in which hydrogen peroxide and active oxygen required for bleaching the tooth surface can be generated from the hydrogen peroxide generating compound. However, it is not particularly limited. As the mixing ratio, for example, when the hydrogen peroxide generating compound is a hydrogen peroxide aqueous solution having a concentration of 3%, it may be selected within the range of 0.1 to 1 part by weight of activated carbon powder to 10 parts by weight of the hydrogen peroxide aqueous solution. it can.

The above dental bleaching agent is used by adhering it to the tooth surface in a state of being mixed with an aqueous hydrogen peroxide solution, a charcoal-containing powder and a necessary thickening agent. As a method of adhering to the tooth surface, it can be appropriately selected by impregnating it with gauze or the like, applying it, dropping it from a dropper, or spraying.

Bleaching is performed by continuing the state in which the dental bleaching agent is adhered to the tooth surface for a predetermined time.
The duration of the adhered state is appropriately changed depending on the degree of discoloration or bleaching of the tooth surface. In this case, generation of active oxygen is an immediate reaction, and bleaching also acts in a short time. Therefore, bleaching can be sufficiently performed by setting the duration to be in the range of 10 seconds to 10 minutes.

The dental bleaching agent may be repeatedly applied, for example, after the first application is performed for about 2 to 5 minutes, the teeth are washed, and the second application is performed to the same extent. Can be done on time. With such repeated adhesion,
It is easy to bleach according to the degree of tooth discoloration,
There is a merit that bleaching can be performed reliably.

As the adhesion of the dental bleaching agent to the teeth, charcoal-containing powder such as activated carbon powder may be adhered to the tooth surface, and the hydrogen peroxide generating compound may be applied thereto. On the contrary, the hydrogen peroxide generating compound may be adhered to the tooth surface, and the charcoal-containing powder may be sprinkled thereon.

A sheet body can be used as a means for attaching the dental bleaching agent to the teeth. As the sheet body, non-woven fabric, cloth such as gauze, or paper material such as Japanese paper can be used. In this case, the state where the carbon-containing powder and the hydrogen peroxide-generating compound are mixed can be impregnated by immersing the sheet body. After that, it is also possible to impregnate the sheet body with the hydrogen peroxide generating compound. In the latter case, since the hydrogen peroxide generating compound can be impregnated into the sheet immediately before bleaching, the active oxygen generated by the decomposition reaction of hydrogen peroxide can be effectively utilized and the bleaching can be performed reliably. It is excellent in that it can The distribution density of the charcoal-containing powder supported on the sheet may be changed, which allows more natural bleaching.

The sheet body holding the charcoal-containing powder and the hydrogen peroxide-generating compound in this manner is adhered to the tooth surface, and by continuing the adhered state, the tooth surface is bleached. In the case of the treatment using the sheet body, it is only necessary to attach the tooth surface of the sheet body to the tooth surface, so that bleaching can be easily performed. The duration of application of the sheet body is appropriately changed depending on the degree of discoloration or bleaching of the tooth surface.

In addition to the above, in the present invention, the hydrogen peroxide-generating compound is mixed in a cosmetic pack, and the powder containing charcoal is mixed in the pack just before the treatment, and the powder is applied to the tooth surface. Bleaching can be done. When a pack agent is used, it hardens with the passage of time, and therefore it can be easily removed by peeling it from the tooth at the time of hardening.

Further, charcoal-containing powder such as activated carbon may be dispersed in a thickener to form a gel, and a hydrogen peroxide generating compound may be mixed with this gel to form a dental bleaching agent. It is also possible to mix it with a thickening agent to form a gel, and mix the powder containing carbon into this gel to form a dental bleaching agent. Furthermore, it is also possible to bleach teeth by kneading charcoal-containing powder such as activated carbon into a brush material to form a toothbrush, immersing the toothbrush in a hydrogen peroxide generating compound, and then brushing the teeth. In this case, the tooth surface can be easily bleached at home because the tooth brushing can be performed in the same manner as the tooth brushing. In this case, the hydrogen peroxide-generating compound can be used in a gel form by mixing a thickening agent, an aqueous solution form, a form mixed with toothpaste, or any other suitable form.

In the bleaching of the tooth surface, the charcoal-containing powder such as the activated charcoal powder acts as a catalyst and can be used repeatedly. For this reason, activated carbon is mixed in a dental tray or a rubber cup, and these can be used repeatedly when bleaching teeth.

In the tooth bleaching of the invention described above, when the carbon-containing powder comes into contact with hydrogen peroxide, the decomposition reaction of hydrogen peroxide is promoted to generate active oxygen, and bleaching is performed by the generated active oxygen. Therefore, it is not necessary to add energy such as light irradiation and heating, and thus advanced technology and facility investment for that are not required. In addition, bleaching can be performed even with a low concentration hydrogen peroxide-generating compound, and since activated carbon has no effect on living organisms, bleaching can be performed while ensuring safety. Furthermore, since it is not necessary to demand an unreasonable posture for bleaching, it does not cause any pain to the subject.

[0043]

EXAMPLES The present invention will be specifically described below with reference to examples.

Example 1 With respect to 25 g of a hydrogen peroxide solution having a concentration of 3%, montmorillonite as a thickening agent was added to 2.5 g.
g was mixed to prepare a hydrogen peroxide generating compound having thixotropic properties. A dental bleaching agent was prepared by mixing 0.1 g of activated carbon powder having a particle size of 5 to 60 μm as carbon-containing powder with 2 g of this hydrogen peroxide-generating compound.

This dental bleaching agent is applied to the surface of the discolored tooth, and 5 minutes after the application, the dental bleaching agent is removed from the surface of the discolored tooth and a new application of the dental bleaching agent is performed a total of three times. As a result, stains and pigments on the discolored tooth surface could be decomposed and removed, and bleaching was completed.

Example 2 Instead of the montmorillonite used in Example 1, 2.5 xanthan gum was used as a thickener.
A hydrogen peroxide generating compound was prepared by mixing g and a dental bleaching agent was prepared in the same manner as in Example 1. And Example 1
Bleaching of the tooth surface was completed by applying it to the discolored tooth surface in the same manner as in.

(Example 3) Activated carbon powder was attached to a non-woven fabric, and this non-woven fabric was impregnated with a 3% hydrogen peroxide aqueous solution. Immediately after this impregnation, a non-woven fabric was attached to the surface of the discolored tooth and left for 15 minutes to complete the bleaching of the discolored tooth surface.

[0048]

According to the invention of claim 1, active hydrogen is generated by contacting the hydrogen peroxide-generating compound with the activated carbon powder to bleach the teeth. Therefore, energy such as light irradiation and heating is applied. There is no need to add it, and practitioners are not required to have sophisticated technology and equipment investment. Further, it is possible to ensure safety for the human body.

According to the invention of claim 2, in addition to having the same effect as that of the invention of claim 1, since the viscosity can be easily adjusted, the discoloration degree of the tooth surface and the required bleaching degree are obtained. Can be adjusted to

According to the invention of claim 3, claims 1 and 2
In addition to the effect similar to that of the invention described above, bleaching can be performed only by sticking the sheet body to the tooth surface, so that the bleaching operation becomes easy.

According to the fourth aspect of the present invention, the tooth surface can be surely bleached without causing pain to the subject.

According to the fifth aspect of the present invention, the sheet body is attached to the tooth surface for bleaching, so that it is possible to perform bleaching easily without causing pain to the subject.

   ─────────────────────────────────────────────────── ─── Continued front page    F-term (reference) 4C083 AB131 AB132 AB411 AB412                       AB442 AD352 CC41 DD12                       EE35

Claims (6)

[Claims] 1. A dental bleaching agent for bleaching a tooth surface, which is used by mixing a carbon-containing powder and a compound capable of generating hydrogen peroxide in an aqueous solution by being attached to the tooth surface. Dental bleaching agent. 2. The dental bleaching agent according to claim 1, wherein a compound that generates hydrogen peroxide in an aqueous solution is mixed with a thickener. 3. The dental bleaching agent according to claim 1, wherein carbon-containing powder is carried on a sheet body, and the sheet body is impregnated with the compound that generates hydrogen peroxide. . 4. The dental bleaching agent according to claim 1, wherein the charcoal-containing powder is activated charcoal powder. 5. A bleaching method, characterized in that a state in which the dental bleaching agent according to claim 1, 2 or 4 is adhered to the tooth surface is continued for a predetermined time. 6. A bleaching method, characterized in that the dental bleaching agent according to claim 3 or 4 is applied to a tooth surface for a predetermined time.