JP2001335450A - Bleaching agent for tooth, method for producing the same, method for bleaching tooth and bleaching apparatus therefor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain a bleaching agent for teeth having higher safety to the human body and a.shorter bleaching time without causing a chemical burn and to provide a method for producing the bleaching agent and a method and an apparatus for bleaching teeth. SOLUTION: This method for bleaching teeth comprises formulating a previously prepared mixture of an inactivated gelling agent 2 and a hydroxy compound 3 with a hydrogen peroxide solution 1 just before application to the surface of teeth S, applying a bleaching agent 1+2+3 thus formed in a gel-like state to the surface of teeth and irradiating the applied bleaching agent 1+2+3 with a laser beam at 2-4 μm wavelength by a bleaching apparatus 4.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a tooth bleaching agent, a method for producing the bleaching agent, a method for bleaching a tooth, and a bleaching apparatus.

[0002]

2. Description of the Related Art In recent years, in the field of dentistry, there has been a tendency that not only treatment but also aesthetic treatment is desired. One example is a desire to make the teeth look white. Such a demand is not related to the original dental treatment, but should not be left alone, and is a technique related to whitening various teeth, a tooth bleaching agent. A method for producing this bleaching agent, a method for bleaching teeth, and a bleaching apparatus have been proposed.

[0003] As a main component of the bleaching agent, a hydrogen peroxide solution is used in consideration of safety to the human body and the like, which directly touches parts other than the enamel of teeth, for example, gingiva. Then, a so-called chemical burn may occur, giving a strong pain and possibly causing tissue erosion.

[0004] For this reason, a method of isolating the surface other than the tooth surface to be bleached by an isolation means called a rubber dam, applying a hydrogen peroxide solution, and heating the applied portion with a heating lamp to promote bleaching. However, it takes time for isolation and the like, and it takes several tens of minutes for the bleaching time. Therefore, improvement has been desired.

[0005] As a solution to this problem, in recent years, the hydrogen peroxide solution is mixed with a gelling agent to form a gel and is applied to the tooth surface, thereby preventing the flow of the applied hydrogen peroxide solution. Laser bleaching using a carbon dioxide gas laser or an argon gas laser is used to heat the part of the tooth surface coated with the hydrogen peroxide solution, but this improves the stability of the gelling agent and the safety of the human body. Further, it has been desired to further reduce the time required for bleaching.

Also, NdYAG used in the conventional method
Lasers and argon lasers have high permeability to liquids, that is, water, and transmit most energy without being absorbed by the drug on the tooth surface, which may cause cracks and other damage to the teeth. In addition, promotion of activation by heat generation cannot be expected. Therefore, in this case, it is necessary to add a dye or the like that absorbs the laser light to the bleaching agent, which requires extra components and time. On the other hand, the carbon dioxide gas laser has a high absorbency for liquids, but also has high absorbency for calcium phosphate and calcium carbonate, which are the constituents of teeth, and causes carbonization of teeth when directly irradiated on the tooth surface. There was also.

[0007]

DISCLOSURE OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and has high chemical safety without causing chemical burn, and has a bleaching time. It is an object of the present invention to provide a shorter tooth bleaching agent, a method for producing this bleaching agent, a method for bleaching teeth and a bleaching device.

[0008]

The bleaching agent for teeth according to claim 1 is a bleaching agent which is used by being applied to the surface of a tooth, comprising at least hydrogen peroxide and an inert gelling agent. Features.

Here, the aqueous hydrogen peroxide mainly plays a role of bleaching teeth. The inert gelling agent is mixed with the hydrogen peroxide solution to form a gel-like mixture, which prevents flow when applied to the tooth surface, and also prevents the hydrogen peroxide solution, the hydroxyl compound and the human compound to be mixed simultaneously with the human body. Inert, does not react, does not prevent the aqueous hydrogen peroxide from exerting its bleaching action, and has a low possibility of adversely affecting the human body.

[0010] The inert gelling agent is not limited to this, and as described later, becomes a gel-like admixture, is applied to the tooth surface, and is affected by the laser light when irradiated. Without being affected, furthermore, without being affected by the hydrogen peroxide solution activated by this irradiation,
It assists in effective tooth bleaching.

By mixing the hydrogen peroxide solution having such properties and an inert gelling agent, the bleaching agent is suitable for tooth bleaching, and in particular, as described later, is irradiated with a laser beam. Therefore, it is suitable when the bleaching action of the hydrogen peroxide solution is enhanced.

Further, this bleaching agent is characterized in that it does not contain a catalyst for accelerating the bleaching action and a coloring agent indicating that the bleaching action is completed, unlike the conventional bleaching agents. This is because the use of the laser light described below enables bleaching in a sufficiently short time without a catalyst, and there is no need to confirm the completion of bleaching by a change in color.

[0013] The tooth bleaching agent according to the second aspect is the first aspect.
The tooth bleaching agent according to the above, further comprising a hydroxyl compound.

[0014] Hydroxyl compounds are used to increase the alkalinity of the admixed mixture. This is because the aqueous hydrogen peroxide, while being acidic in itself, exerts more bleaching action in an alkaline atmosphere than in an acidic atmosphere.

Therefore, by further mixing such a hydroxyl group compound, the bleaching effect of the hydrogen peroxide solution is maintained or more effectively exerted.

The tooth bleaching agent according to the third aspect is the first aspect.
Or the tooth bleaching agent according to 2, wherein the inert gelling agent is carmellose sodium (sodium carboxymethylcellulose).

[0017] Carmellose sodium is originally taken as a laxative and is a drug that has also been confirmed to be safe for the human body. It becomes a gel when mixed with water,
When the viscosity is adjusted to an appropriate level, even if it is applied on a curved surface such as tooth enamel, it will not flow or drip, and the hydrogen peroxide solution will be retained on the tooth surface. You can do it.

Further, since carmellose sodium is stable to chemicals, heat, and light, is inert, and is harmless to food, it is admixed with aqueous hydrogen peroxide and a hydroxyl compound. It does not react, does not hinder their function, and is safe to receive laser light, so that an ideal bleaching agent can be provided by using this.

The inert gelling agent is not limited to this, and amorphous fumed silica, polymethyl vinyl ether maleate potassium salt polymer compound, cellulosic material, preferably hydroxyethylcellulose and cellulose sodium sulfate are used alone. Or a mixture thereof.

The tooth bleaching agent according to the fourth aspect is the second aspect.
Or the tooth bleaching agent according to any one of the above, wherein the hydroxyl compound is calcium hydroxide.

Calcium hydroxide is a typical hydroxyl group compound. In a dental clinic using this bleaching agent, after forming a cavity in the tooth, the bottom of the cavity near the dental pulp softens heat conduction to the dental pulp. Since it is also a dental material always provided as a filler, it is easy to obtain and use, and the tooth bleaching agent of the present invention can be easily formed. However, the hydroxyl compound is used in a very small amount, and any basic compound may be used.

The tooth bleaching agent according to the fifth aspect is the fourth aspect.
Wherein the ratio of the calcium hydroxide powder to the solution 1000 having a concentration of 35% of the hydrogen peroxide solution is 0.5 to 10 by weight. I do.

In this bleaching agent, the mixing ratio of calcium hydroxide mixed to maintain the bleaching action of the hydrogen peroxide solution is experimentally determined.
Ideally maintains and demonstrates the bleaching action of hydrogen peroxide water. On the other hand, the mixing ratio between the inert gelling agent and the hydrogen peroxide solution should be adjusted so that the viscosity of the gelled mixture does not drip when applied to the tooth surface during mixing. Good.

A method for producing a tooth bleach according to claim 6 is the method for producing a tooth bleach according to any one of claims 1 to 5, wherein the inert gelling agent is prepared in advance. Alternatively, the mixture of the inert gelling agent and the hydroxyl group compound is mixed with the hydrogen peroxide solution immediately before application to the tooth surface.

[0025] The tooth bleaching agent used in the present invention is a hydrogen bleaching agent that emits hydrogen peroxide solution which is divergent in a state where oxygen, which is a source of the bleaching action, is left indoors or when there is a large area in which oxygen is mixed and comes into contact with air. Since it is used, it is not preferable to store it for a long time while mixing the hydrogen peroxide solution and the others. Therefore, in this production method, such an inert gelling agent that does not change over time is prepared alone, or is previously mixed with a hydroxyl compound at a predetermined ratio, and this mixture and the like and a hydrogen peroxide solution are used immediately before use. Is mixed. Therefore, the bleaching power of the hydrogen peroxide solution does not decrease.

A tooth bleaching method according to a seventh aspect is a method for bleaching a tooth using the tooth bleaching agent according to any one of the first to fifth aspects, wherein the inactive prepared in advance is used. A gelling agent or a mixture of the inert gelling agent and the hydroxyl compound is mixed with the hydrogen peroxide solution immediately before being applied to the tooth surface, and the resulting gel bleaching agent is formed on the tooth surface. And then irradiating the applied bleaching agent with laser light having a wavelength of 2 to 4 μm.

In this bleaching method, a bleaching agent having the above-mentioned characteristics is mixed immediately before being applied to teeth, and the bleaching agent applied to the teeth is irradiated with a laser beam having a wavelength of 2 to 4 μm. Therefore, the bleaching power of the hydrogen peroxide solution does not decrease.

The laser light having a wavelength of 2 to 4 μm is a wavelength of a portion where the absorption rate of the light absorption wavelength band of water or a hydroxyl group is large, and the laser light is well absorbed by the hydrogen peroxide solution to become thermal energy. Activate the hydrogen peroxide solution,
Since the bleaching action is enhanced, the teeth can be bleached more efficiently and in a shorter time.

In particular, an erbium yag laser having a wavelength of 2.94 μm has the best absorptivity to water and a hydroxyl group, and is most suitable as a laser used in the bleaching method of the present invention.

The tooth bleaching apparatus according to claim 8 is a tooth bleaching agent according to any one of claims 1 to 5, wherein the tooth bleaching is performed at a wavelength of 2 to 4 μm and an energy density of 0. 0.1 to 50 mJ / square mm, pulse 1 to 30 pps,
A laser beam having an irradiation beam diameter of φ2 mm to φ20 mm can be irradiated.

This bleaching apparatus is adapted to irradiate the optimum laser beam used in the bleaching method of the present invention, and is suitable for more effectively performing the bleaching method. In particular, when the energy density is 0.1 to 50 mJ / square mm, the enamel of the tooth and the surrounding soft tissue such as the gingiva are not damaged, while the bleaching action of the hydrogen peroxide solution is enhanced. Is enough. Also, pulses 1 to 3
Since the irradiation is performed in a pulse shape at 0 pps, the energy per one pulse can be reduced. Therefore, the amount of energy absorbed by the irradiation target is small, and the temperature of the tooth in a state where the mixture is applied may give a patient an unpleasant feeling. The heat effect on the pulp etc. is extremely low. Furthermore,
If the irradiation beam is φ2 mm to φ20 mm, in the maximum case, one irradiation can cover almost the surface of one tooth to be bleached, and one irradiation can bleach one tooth, which is convenient.

[0032]

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, a tooth bleaching agent, a method for producing the bleaching agent, a method for bleaching teeth, and a bleaching apparatus according to the present invention will be described in detail with reference to the drawings.

FIGS. 1 (a) to 1 (f) are diagrams for explaining the tooth bleaching method of the present invention.

Of these figures, FIGS. 1 (a), (d),
(E) and (f) show a plurality of teeth S to be bleached. These teeth S are obtained by extracting only the teeth S where the oral cavity of the patient is viewed from the front. As shown in FIG. 1 (a), among the plurality of teeth S, the shaded tooth S is assumed to be yellowed, and here, the adjacent tooth S (1
1) shows a case where only S (21) is bleached. The numbers in parentheses are based on the ISO standard tooth formula.

The yellowed teeth S (11) and S (21) (FIG. 1)
For (a)), first, a hydrogen peroxide solution 1, an inert gelling agent 2, and a hydroxyl compound 3 are prepared as mixed components of a bleaching agent (FIG. 1 (b)). In addition, the hydroxyl group compound 3
It is not essential and may not be used.

The hydrogen peroxide solution 1 has a hydrogen peroxide concentration of 3
A 5% solution is preferred, but not limited to.

As the inert gelling agent 2, carmellose sodium is preferable, but not limited thereto. Amorphous fumed silica, polymethyl vinyl ether maleate potassium polymer compound, a cellulosic material, preferably hydroxyethyl cellulose and Sodium cellulose sulfate or the like can be used alone or as a mixture.

Carmellose sodium, also called sodium carboxymethylcellulose, is taken as a constipation drug and has a high degree of safety. When mixed with water, it becomes a gel, and when its viscosity is adjusted to an appropriate level, the enamel The hydrogen peroxide solution can be held on the tooth surface without flowing or dripping even when applied on a curved surface such as quality.

Further, carmellose sodium is stable to chemicals, heat and light, has an inert property, and is harmless to food. Therefore, carmellose sodium is mixed with aqueous hydrogen peroxide and a hydroxyl compound. It does not react, does not hinder their function, and is safe to be irradiated with laser light. Therefore, using this makes it an ideal bleaching agent.

As the hydroxyl group compound 3, calcium hydroxide is preferable, but any compound may be used as long as it is used in a very small amount and is basic.

Calcium hydroxide is a typical hydroxyl group compound. In a dental clinic using this bleaching agent, after forming a cavity in a tooth, the bottom of the cavity near the dental pulp softens heat conduction to the dental pulp. Since it is a dental material that is always provided as a filler, it is not only safe for the human body, but also easy to obtain and use, and the tooth bleaching agent of the present invention can be easily formed.

In this case, as shown in the figure, if the inert gelling agent 2 and the hydroxyl compound 3 are used as a mixture 2 or 3 which has been previously mixed at a predetermined mixing ratio, each time the bleaching is performed, It is convenient because there is no need to measure the amount of the mixture.

On the other hand, a hydrogen peroxide solution 1 and the mixture 2, 3
When they are not used, if they are separately stored, it is possible to prevent deterioration of the hydrogen peroxide solution 1, that is, decrease in bleaching power.

In this way, this bleaching agent is mixed with the hydrogen peroxide solution 1 and the mixture 2, 3 of the inert gelling agent 2 and the hydroxyl compound 3 immediately before use, and applied to the surface of the tooth S. The bleach is adjusted to a viscosity that does not drip and is produced as a bleaching agent 1 + 2 + 3 (FIG. 1 (c)).

The mixing ratio of the hydroxyl compound 3 in the mixtures 2 and 3 is such that when the aqueous hydrogen peroxide 1 and the mixtures 2 and 3 are mixed to have an appropriate viscosity, the aqueous hydrogen peroxide compound 1
The weight ratio of the calcium hydroxide powder to the solution 1000 having a concentration of 35% is 0.5 to 10 by weight. The bleaching action of the hydrogen water 1 is maintained without being reduced.

The bleach 1 + 2 + 3 thus produced is
It is a gel having an appropriate viscosity, and is applied to the teeth SS (11) and S (21) by applying means (not shown) (FIG. 1).
(D)). At this time, since the bleaching agent 1 + 2 + 3 is a gel having an appropriate viscosity, the bleaching agent 1 can be held on the tooth surface without flowing or dripping.

Therefore, there is very little possibility that the bleaching agent will cause chemical burns that will affect the gums and the like.

In this state, the tooth bleaching device 4 of the present invention is prepared, and the wavelength 2
４4 μm, energy density 0.1-50 mJ / square mm,
Pulse 1 to 30 pps, irradiation beam diameter φ2 mm to φ20
As shown in FIG. 1 (e), a laser beam of mm is applied so as to cover one tooth to be bleached at a time.

The irradiation time, that is, the bleaching time, is sufficient if the irradiation of 10 seconds per tooth is repeated three times.
This irradiation time is much shorter than the conventional case where, for example, using an argon laser, it is necessary to repeat 30 seconds of irradiation once each three times.

The laser light having a wavelength of 2 to 4 μm is a wavelength of a portion where the absorption rate of the light absorption wavelength band of water or a hydroxyl group is large. The laser light is well absorbed by the hydrogen peroxide solution to become thermal energy, Since the hydrogen oxide water is activated to enhance the bleaching action, the teeth can be bleached more efficiently and in a short time.

In particular, an erbium yag laser having a wavelength of 2.94 μm has the best absorptivity to water or a hydroxyl group, and is most suitable as a laser used in the bleaching method of the present invention.

An energy density of 0.1 to 50 mJ / square m
Assuming m, it does not damage the tooth enamel or the surrounding soft tissues such as gums, but is sufficient to enhance the bleaching action of the hydrogen peroxide solution. In addition, since the pulse is irradiated with a pulse of 1 to 30 pps,
Because the energy per pulse can be reduced,
The amount of energy absorbed by the irradiation target is small, the temperature of the tooth in a state where the mixture is applied does not rise to such an extent that the patient has an unpleasant feeling, and the thermal influence on the dental pulp and the like is extremely low. Further, when the irradiation beam is φ2 mm to φ20 mm,
One irradiation can cover the surface of almost one tooth to be bleached, and one irradiation can bleach one tooth, and if necessary, bleaching only the point-like yellowing parts Can be used, and convenience is good.

In the drawing, the irradiation range of the laser beam emitted from the laser probe 4a of the bleaching device 4 is indicated by oblique lines, giving an impression that the laser beam itself is visible, but this is not the case. The laser light having a wavelength of 2 to 4 μm used in the present invention is invisible. Since the bleaching device 4 is provided with a visible light irradiating means (not shown) on the laser probe 4a, the guide light is visible. is there.

When the laser light irradiation is completed in this way and the applied bleaching agent 1 + 2 + 3 is removed, bleached teeth S (11) and S (21) appear as shown in FIG. 1 (f).

FIG. 2 is an external perspective view of an example of the tooth bleaching apparatus of the present invention.

The bleaching device 4 includes the above-described laser probe 4a, a handpiece 4b to which the laser probe 4a is attached, a laser light guide 4c for guiding a laser beam to the handpiece 4b, and a laser beam to the laser light guide 4c. A laser light source 4d, an air supply source 4e for sending air, a water supply source 4f for sending water as needed, a device main body 4g accommodating them, and a caster 4h capable of moving the device main body 4g are provided. .

The bleaching device 4 for generating such a laser beam
Has a well-known configuration as a laser light generator,
Similarly, a pulse control means and an energy control means are provided as a well-known configuration, and a pulse of a laser beam is set to 1 to 30 pp.
s, the energy density can be 0.1 to 50 mJ / square mm. The laser light source 4d includes an erbium yag, and can generate a laser beam having a wavelength of 2.94 μm. Further, the laser probe 4a
Irradiation beams of φ2 mm to φ20 mm can be irradiated.

Such a bleaching apparatus 4 is suitable for carrying out the bleaching method of the present invention.

FIG. 3A is an enlarged longitudinal sectional view of a laser probe of the bleaching apparatus of FIG. 2, and FIG. 3B is an enlarged longitudinal sectional view of a conventional laser probe.

In FIG. 3 (a), 4aa is an incident end face of the laser beam of the laser probe 4a, 4ab is an exit end face, and 4ca is an exit end face of the laser light guide path 4c.
Is a convex lens that collects laser light emitted from the emission end face 4ca.

On the other hand, the conventional laser probe 14a shown in FIG.
ab, and similarly, a convex lens 14c for condensing laser light from a laser light guide path 14c having an emission end face 14ca.
b and exits from the exit end face 14ab.

Comparing the two, the conventional laser probe 14a has the incident end face 14aa at a right angle θ10 to the probe 14a, and the probe 14a itself is also straight. On the other hand, in the laser probe 4a of the present invention, the incident end face 4aa is inclined at a predetermined angle θ1 with respect to the probe 4a.
a itself is also curved at a predetermined curvature R.

In such a laser probe 4a, the irradiation energy curve CA of the conventional probe 14a is centrally concentrated, but the irradiation energy curve CA is flatter and the irradiation energy of the laser beam is more average. Are distributed.

As a result of research, the present inventor has found that the probe 4a provided with such an inclination of the incident end face and the curvature of the probe itself.
Has an irradiation energy curve CA as shown in the figure. According to such a probe 4a, the irradiation energy is more evenly distributed on the irradiation surface, so that the applied bleaching agent is more evenly distributed. The energy of the laser is irradiated, which is suitable for use in the bleaching method as in the present invention.

According to the tooth bleaching agent of claim 1,
Hydrogen peroxide, mixed with an inert gelling agent, is suitable for tooth bleaching, especially when irradiated with laser light to enhance the bleaching action of hydrogen peroxide as described below. Suitable for. .

According to the tooth bleaching agent of the second aspect, in addition to the effect of the first aspect, by further mixing a hydroxyl group compound, the bleaching effect of the hydrogen peroxide solution can be maintained or exerted more effectively. Is done.

According to the third aspect of the present invention, in addition to the effect of the first or second aspect, the inert gelling agent is carmellose sodium, so that it is highly safe and miscible with water. When it is applied to a curved surface such as tooth enamel, it does not flow or droop, and hydrogen peroxide water is applied to the tooth. Can be held on the surface.

Furthermore, carmellose sodium is stable against chemicals, heat and light, has an inert property, and is harmless to food. Therefore, carmellose sodium is mixed with aqueous hydrogen peroxide or a hydroxyl compound. It does not react, does not hinder their function, and is safe to receive laser light, so that an ideal bleaching agent can be provided by using this.

According to the tooth bleaching agent of the fourth aspect, in addition to the effect of the second or third aspect, since the hydroxyl compound is calcium hydroxide, it is a typical hydroxyl compound. In a dental clinic using bleach, after forming a cavity in the tooth, it is also a dental material that is always provided as a filler at the bottom of the cavity near the dental pulp as a filler to reduce heat conduction to the dental pulp. It is easy to use and can easily form the tooth bleach of the present invention.

The tooth bleaching agent according to the fifth aspect is the fourth aspect.
In addition to the effects of the above, the mixing ratio of calcium hydroxide mixed to maintain the bleaching action of the hydrogen peroxide solution was determined experimentally. Is ideally maintained and exerted.

According to the method for producing a tooth bleaching agent according to the sixth aspect, in addition to the effect of any one of the first to fifth aspects, an inert gelling agent which does not change over time is prepared alone, or Since the compound and the mixture are mixed in advance at a predetermined ratio and the mixture and the like and the hydrogen peroxide solution are mixed immediately before use, the bleaching power of the hydrogen peroxide solution does not decrease.

According to the method for bleaching teeth according to claim 7,
In addition to the effect of any one of claims 1 to 5, a length of 2 to 4 μm
Since the laser light is used, the laser light is well absorbed by the hydrogen peroxide solution and becomes thermal energy, which activates the hydrogen peroxide solution and enhances its bleaching action. can do.

According to the tooth bleaching device of the eighth aspect,
In addition to the effects of any one of the first to fifth aspects, the present invention enables irradiation with an optimum laser beam used in the bleaching method of the present invention, and is suitable for more effectively performing the bleaching method.

[Brief description of the drawings]

1 (a) to 1 (f) are diagrams for explaining a tooth bleaching method of the present invention.

FIG. 2 is an external perspective view of an example of the tooth bleaching apparatus of the present invention.

3A is an enlarged longitudinal sectional view of a laser probe of the bleaching apparatus of FIG. 2, and FIG. 3B is an enlarged longitudinal sectional view of a conventional laser probe.

[Explanation of symbols]

 Reference Signs List 1 hydrogen peroxide water 2 inert gelling agent 3 hydroxyl compound 1 + 2 + 3 tooth bleach 4 bleaching device

Continued on the front page (72) Inventor Junko Oishi 680 Higashihama-machi, Fushimi-ku, Kyoto, Kyoto F-term in Morita Manufacturing Co., Ltd. (reference) 4C083 AB031 AB032 AB411 AB412 AD271 AD272 BB55 CC41 DD22 DD27 DD41 EE06 EE07 EE35 FF05

Claims (8)

[Claims] 1. A bleaching agent to be applied to the surface of a tooth, comprising at least hydrogen peroxide and an inert gelling agent. 2. The tooth bleaching agent according to claim 1, further comprising a hydroxyl compound. 3. The tooth bleaching agent according to claim 1, wherein the inert gelling agent is carmellose sodium (sodium carboxymethylcellulose). 4. The tooth bleaching agent according to claim 2, wherein the hydroxyl compound is calcium hydroxide. 5. The tooth bleaching agent according to claim 4, wherein the weight ratio of said calcium hydroxide powder to said solution 1000 of 35% hydrogen peroxide solution is 0.1%.
A tooth bleaching agent, characterized in that it is 5 to 10. 6. The method for producing a tooth bleaching agent according to claim 1, wherein said inert gelling agent or a mixture of said inert gelling agent and said hydroxyl group compound is prepared in advance. Is mixed with the above-mentioned hydrogen peroxide solution immediately before application to the tooth surface. 7. A method for bleaching teeth using the tooth bleaching agent according to any one of claims 1 to 5, wherein the inert gelling agent or the inert gelling agent prepared in advance is provided. And a mixture of the hydroxyl group compound and the hydrogen peroxide solution immediately before being applied to the tooth surface, and applying the thus formed gel bleaching agent to the tooth surface, and then applying the applied bleaching. A method for bleaching teeth, comprising irradiating the agent with laser light having a wavelength of 2 to 4 μm. 8. A wavelength of 2 to 4 used for bleaching teeth using the tooth bleaching agent according to any one of claims 1 to 5.
μm, energy density 0.1 to 50 mJ / square mm, pulse 1 to 30 pps, irradiation beam diameter φ2 mm to φ20 mm
A tooth bleaching device characterized in that it can be irradiated with a laser beam.