KR20190117466A - Removable tooth-attached patch by brushing - Google Patents

Abstract

The present invention relates to a patch attached to teeth or a peripheral portion of teeth, which comprises: a drug layer containing a pharmaceutical active ingredient; and a support layer located on one side of the drug layer, absorbing moisture and reducing tensile strength by 50% or more compared to before the moisture absorption. The patch of the present invention can be easily removed only by toothbrushing without removing the support layer separately.

Description

Removable tooth-attached patch by brushing}

The present invention relates to a tooth or tooth peripheral attachment patch that can be removed by brushing, and more particularly, to a tooth or tooth peripheral attachment patch that can be removed simply by brushing without removing the support layer supporting the drug layer.

Although procedures such as whitening of teeth have been mainly performed in the past, dental procedures are cumbersome and costly in terms of cost, and in recent years, a lot of developments have been made on products that can be easily used.

For tooth whitening, toothpaste, mouthrinse, chewing gum, oral tray, tooth coating gel, oral patch, etc., but the patch type is most used in consideration of ease of use. It is becoming.

Tooth patch is generally a structure comprising a drug layer containing a drug according to the purpose of use, such as a tooth whitening drug, a drug for prevention or improvement of a syringe, and a support layer for selectively transferring the drug component toward the tooth Has

Korean Patent No. 10-0458337 proposes to prepare the support layer as water insoluble so that the drug component contained in the patch can be selectively delivered only to the teeth. However, a patch comprising such a water insoluble support layer is cumbersome to detach the remaining support layer after use of the product. On the other hand, when the brush is removed without brushing, the undissolved film mass is entangled in the toothbrush, which causes a situation in which the toothbrush is difficult to remove. As a product for improving this, a product was developed that dissolves in the oral cavity after attaching a patch, but the drug component is not selectively delivered to the teeth, and mixed with saliva, thereby causing a problem in that the desired drug is not expressed. In addition, there is a problem of ingesting an efficacy substance, and the drug contained in the outer layer while being melted from the outer layer rather than the tooth contacting part has a problem in that it is not properly supplied to the tooth.

The peel-off method after use often leaves residues due to the adhesion between the tooth and the patch, and the patch may break during the peel-off depending on the tensile force of the patch.

On the other hand, the inventors of the present invention to control the tensile strength of the support layer to prevent the delivery of the drug delivered from the drug layer to the oral cavity in the use process, to develop a way to effectively remove after use.

Accordingly, the present invention solves the above problems and provides a patch for attaching a tooth or tooth periphery, which can be easily removed from the tooth surface only by brushing, but does not entangle the film mass that does not dissolve between the toothbrushes.

The present invention provides a patch for attaching a simple tooth or a tooth periphery that can be removed simply by brushing, without generating any waste after use.

In addition, during the use time, the drug is prevented from being released to the outside by the water-insoluble polymer, so that the drug can be properly supplied to the target site, and the water-soluble polymer absorbs saliva over time to loosen the bond between the polymers formed in the support layer. It provides a patch that can be easily removed by a physical removal method such as brushing.

In order to solve the above problems, the present invention allows the drug contained in the tooth patch to selectively move to the surface of the tooth, the support layer of the patch for the tooth or tooth peripheral attachment that serves to maintain the shape of the patch after use Recognizing that the removal is cumbersome, the result of a long study to prepare a method that can be easily removed only by brushing the present invention has been completed.

The inventors of the present invention have confirmed that there are differences in the removal force of the patch attached to the tooth surface according to the change in tensile strength measured after use.

That is, after the drug contained in the drug layer of the tooth or the patch around the tooth is released to the tooth surface by adjusting the tensile strength of the support layer remaining on the tooth surface, it is confirmed that the support layer can be removed only by brushing without having to remove it by hand. Was done.

An embodiment of the present invention provides a patch for attaching a tooth or a peripheral portion of a drug layer including a drug active ingredient and a support layer which is located on one surface of the drug layer and includes a support layer which absorbs moisture and reduces tensile strength by 50% or more compared to water absorption. to provide.

The tooth or tooth periphery patch may be disassembled and dropped by brushing.

In the support layer of the patch according to an embodiment of the present invention, the tensile strength of the support layer measured in a state where water is sufficiently absorbed may be reduced by 50% or more compared to before the water absorption. A state where water is sufficiently absorbed may mean the degree of substantially no change in water absorption rate even if water is continuously supplied. It can be understood that the degree of evaporation into the air does not substantially change the moisture absorption rate.

The tensile strength of the support layer may be reduced by 60% or more, and preferably 60% or more and 95% or less, compared to before the water absorption.

Preferably, the tensile strength of the support layer of the present invention may be reduced by 50% or more compared to before the absorption of the tensile strength of the support layer of the patch measured in the state that absorbed enough moisture so that there is no change in moisture absorption rate for 10 seconds. Specifically, the tensile strength of the support layer is measured by Zwick universal testing machine, DE / 1494 speed of 0.1mm / s in an environment of temperature 25 ℃ can be reduced by more than 50% compared to before water absorption.

According to one embodiment of the present invention, when the tensile strength is reduced by 50% or more compared with before contact with moisture, it may be easy to disassemble and drop off the patch support layer. In another embodiment of the present invention, when the tensile strength is reduced by 50% or more, the extent to which the support layer is decomposed and dropped by brushing is excellently observed.

The patch including the drug layer and the support layer of the present invention can be used to attach to the teeth. In another embodiment, the patch may be attached to the tooth and the tissue around the tooth according to the purpose of use of the patch. As used herein, “peripheral teeth or surrounding tissue” may include both the portion of the gum in contact with the tooth and the portion of the oral cavity that may be in contact with the toothbrush in the course of brushing, even if somewhat away from the tooth.

By "disassembly" is meant that one piece is divided or split into smaller pieces. The disassembled pieces of the present invention may have a certain size, but may be divided into various sizes according to external force or pressure.

The term “dropout” refers to a state in which a part of the patch is detached from the tooth surface, unlike a state attached to the tooth surface, and a part of the patch naturally falls off due to an external force applied to the tooth surface or over time. Means.

As used herein, the term "brushing" is also referred to as brushing, and means a process of removing a residue or debris in the tooth gap by applying a force perpendicular to or parallel to the tooth surface.

The "tensile strength" is pulled by applying force to the material gradually increases and finally the material is broken or broken (破 斷), which means the value applied to the material up to this point. As used herein, the tensile strength means a force when the patch is finally broken by pulling a patch for tooth attachment having a length of 1 cm and a length of 7 cm in length, respectively.

The inventors of the present invention, in particular, confirmed that the tensile strength required to achieve the object of the present invention can be achieved by a combination of a water-soluble polymer and a water-insoluble polymer included in the support layer.

The patch for attaching teeth of the present invention may include a drug layer including a medicinal ingredient and a support layer on the opposite side of the surface to which the drug layer is attached to the tooth surface.

Drug delivery systems of most patch formulations, particularly patch for tooth attachment, have a support layer to enable specific drug delivery to the site of interest. The support layer generally uses a polymer that does not dissolve in water or saliva so that it can retain its shape even when attached to the teeth. In addition, when the drug is eluted when attached to the tooth is delivered to the tooth, it is possible to dissolve only in the tooth direction. That is, it was common for the drug to be selectively delivered in the tooth direction and to be water impermeable or water insoluble to prevent the drug from diluting with saliva or water.

This water impermeable or water insoluble support layer had to be removed from the tooth surface after using the patch.

After removing the support layer after use, it is necessary to brush teeth in order to remove the residues remaining on the tooth surface. The inventors of the present invention adjust the tensile strength of the support layer to conveniently deliver the drug to the tooth surface with only the tooth brush without removing the support layer. A plan for removal from the tooth surface has been devised.

In other words, the industry has come to produce a form that can be decomposed by brushing by adjusting the tensile strength without removing the drug support layer that has been produced and used only in the water insoluble in the industry.

The drug layer may comprise a drug delivered to the tooth. The drug may preferably be delivered to the tooth surface, and examples of the drug include a tooth whitening component, a component for preventing or ameliorating syrup, a component for preventing or improving periodontitis, a component for preventing or improving gingivitis, or a caries prevention component. can do.

Examples of the tooth whitening component include peroxides, polyphosphates, enzymes, and chlorine bleaches. Peroxides are hydrogen peroxide, carbamide peroxide, calcium peroxide, sodium percarbonate, sodium perborate, sodium perorate and tetrasodium pyrophosphate peroxidate and mixtures thereof. It can select from the group which consists of, and can use. Phosphates and enzymes are effective at removing major stains in the enamel adhesion layer. Examples of the polyphosphate include sodium pyrophosphate (TSPP), sodium pyrophosphate (SAPP), sodium hexametaphosphate (SHMP), sodium tripolyphosphate (STP), One or two of sodium potassium tripolyphosphate (SKTP), potassium pyrophosphate (TKPP), and ultraphosphate acidic sodium meta-polyphosphate and acidic sodium polyphosphate More than one species can be used. In general, polyphosphate is known to be effective as a tartar control agent in toothpaste to inhibit tartar formation or to remove tartar. In addition, they are good chelating agents of metals, which can effectively remove tooth stains produced by metals such as iron, calcium, and magnesium in foods and working environments among tooth stains, which may contribute to the improvement of the whitening effect. The use of these polyphosphates in the preparations according to the present invention not only improves the whitening effect by removing light extrinsic stains, but also prolongs the contact time between teeth and condensed phosphates, which is effective in inhibiting tartar formation or removing tartar. It is expected to be. Chlorine-based bleaches include sodium chlorite and sodium hypochlorite. In addition, papain, vitamin E and sodium bicarbonate may also be used as a whitening agent.

In another embodiment, as a syrup preventing or improving or caries prevention component, strontium chloride, calcium carbonate, sodium citrate, sodium fluoride, silica, hydroxyapatite, potassium nitrate, potassium phosphate, or the like may be used.

In another embodiment, the active ingredient may include a periodontal disease prevention component, and periodontal disease refers to a loss of teeth due to clinical periodontitis, gingivitis and bleeding, periodontal sac formation, and destruction of alveolar bone. In order to prevent the development of periodontal disease, the medicinal layer is bamboo salt, corn unchecked quantitative extract, polycrezulene, Tetracycline, Chlorhexidine gluconate, Cetylpyridium chloride ), Sanguinarine and Triclosan, and the like, such as groceries, Centella asiatica, chamomile, latania, myrrh, lettuce, green tea, horse riding, green tea, licorice, golden, pogongyoung, gold and silver coins. It may also include herbal extracts.

The drug layer is a dry type that has no adhesive strength or weak strength in a dry state but is released or begins to be hydrated when the whitening agent is hydrated by a small amount of water at the site where the whitening agent is desired to act. It can also be used as a gel that can be attached to teeth by its own viscosity. The polymer used in the drug layer should be hydrophilic or at least partially hydrophilic. Mainly used polymers include polyalkyl vinyl ether-maleic acid copolymers (PVM / MA copolymer; Gantrez AN 119, AN 139, S-97), polyvinyl alcohol, polyacrylic acid, poloxamer 407 (Poloxamer 407; Pluronic, poly ( ethylene oxide) -poly (propylene oxide) -poly (ethylene oxide) triblock copolymer), polyethylene oxide (Polyox), polyvinylpyrrolidone-vinylacetate copolymer (PVP / VA copolymer; Luviskol VA, Plasdone S PVP / VA) , Polyvinylpyrrolidone (PVP; K-15 ~ K-120), polyquaternium-11 (polyquaternium-11, Gafquat 755N), polyquaternium-39 (polyquaternium-39, Merquat plus 3330), carboxypolymethylene (Carbomer, Carbopol), hydroxypropylmethyl cellulose, hydroxyethyl cellulose, hydroxypropyl cellulose, gelatin, sodium alginate alone or mixtures thereof can be used. As the solvent of these polymers, water, ethanol alone or a mixture thereof, and other organic solvents such as ethyl acetate, methylene chloride, isopropyl alcohol, acetonitrile alone, or a mixture thereof may be used in proportion. .

The tooth attachment must be flexible enough because it attaches directly to the tooth and must be easily shaped as the tooth flexes. Since some of these polymers are inferior in flexibility, a suitable plasticizer may be added. Suitable plasticizers vary depending on the type of polymer and its formulation, but are generally used polypropylene glycol, glycerin or polyethylene glycol, all of which may be used.

In addition, it is also possible to add a chelating agent, for example, EDTA, sodium citrate or the like, to the drug layer for the purpose of improving the time stability of the peroxide.

As used herein, the term "drug layer" refers to a layer containing an active ingredient that can achieve the purpose of a patch for tooth attachment. For example, a patch for tooth whitening means a layer containing a tooth whitening component (preferably hydrogen peroxide, sodium peroxide, etc.), and an anti-infection patch means a layer containing potassium nitrate, potassium chloride, and the like, which are anti-inhibitory components. do.

As used herein, the "support layer" may serve to prevent the drug layer from contacting other skin in the oral cavity other than the teeth.

In one embodiment of the invention the support layer may comprise a water-insoluble polymer generally used in oral films, for example cellulose acetate phthalate, shellac, polyvinyl acetate, ethyl cellulose, poly methylmethacryl Methacrylate methacryloyl ethyl betaine / methacrylate copolymer (Yukaformer: manufacturing company Mitsubishi, methacryloylethyl betain / methacrylate copolymer), methacrylic acid copolymer (methacrylic acid copolymer; Eudragit L 100, Eudragit L 12,5, Eudragit L 100-55, Eudragit L 30D-55), an aminoalkyl methacrylate copolymer (Eudragit E 100, Eudragit E 12,5, Eudragit RL 100, Eudragit RL 30D) and the like may be used. Along with this, the support layer of the patch for tooth attachment of the present invention contains a water-soluble polymer. As used herein, a water-soluble polymer means a polymer that can be dissolved in water, swelled or dispersed into small particles. Hydrophilic polymer may also be used in the same sense as the water-soluble polymer of the present invention.

The water-soluble polymer may include a water-soluble polymer that can be used in the drug layer, polyalkyl vinyl ether-maleic acid copolymer (PVM / MA copolymer; Gantrez AN 119, AN 139, S-97), polyvinyl alcohol, polyacrylic acid , Poloxamer 407 (Pluronic, poly (ethylene oxide) -poly (propylene oxide) -poly (ethylene oxide) triblock copolymer), polyethylene oxide (Polyox), polyvinylpyrrolidone-vinylacetate copolymer (PVP / VA copolymer; Luviskol VA, Plasdone S PVP / VA), polyvinylpyrrolidone (PVP; K-15 ~ K-120), polyquaternium-11 (polyquaternium-11, Gafquat 755N), polyquaternium-39 ( polyquaternium-39, Merquat plus 3330), carboxypolymethylene (Carbomer, Carbopol), hydroxypropylmethyl cellulose, hydroxyethyl cellulose, hydroxypropyl cellulose, gelatin, sodium alginate, and the like. , Preferably hydroxypropylmeth Cellulose, polyvinylpyrrolidone is available money or a mixture thereof.

The support layer can be used by adding various plasticizers for the same reason as the drug layer. In addition to the above-mentioned plasticizers propylene glycol, glycerin and polyethylene glycol, more kinds of plasticizers may be used depending on the solvent used, and castor oil and hydrogenated castor oil may also be used.

As the solvent, water, ethanol alone or a mixture thereof and other organic solvents such as ethyl acetate, methylene chloride, isopropyl alcohol, acetonitrile alone or a mixture thereof may be used in proportion.

According to an embodiment of the present invention, the content of the water-soluble polymer and the water-insoluble polymer included in the support layer may be a weight ratio of the water-soluble polymer: water-insoluble polymer included in the support layer is 1: 4 to 4: 1, preferably 1.5: 4 To 3.5: 4 by weight.

When the weight ratio of the water-soluble polymer and the water-insoluble polymer is as described above, the patch support layer of the present invention can be easily removed by brushing after water absorption while stably supporting the drug layer.

When the content of the water-soluble polymer is excessive, there may be a disadvantage in that it does not function properly as a support layer and the patch fixing force is weak.When the content of the water-soluble polymer is small, the rate of change of tensile strength after water absorption is small, so that the patch is decomposed by brushing. It may be weak and difficult to achieve the object of the present invention.

In addition to the drug layer and the support layer, the patch for tooth attachment of the present invention may optionally include a layer between the drug layer and the support layer or at the outer edge thereof, depending on the purpose.

According to one embodiment of the present invention, the patch for tooth attachment of the present invention can be easily removed from the tooth simply by brushing, without removing the support layer after use.

The patch for tooth attachment of the present invention can be easily removed by brushing after use.

As used herein, the term "patch" refers to an adhesive formulation containing a particular component, and the form or structure of the patch is not particularly limited.

In addition, the patch for tooth attachment according to the present invention can be prepared according to the method described in US Patent No. 6,689,344, 6,682,721, 6,780,401 and the like.

The tooth patch of the present invention is a tooth patch for convenient use that does not require the release of the support layer while selectively releasing the drug onto the tooth surface.

The patch of the present invention can be decomposed and removed only by light brushing.

The patch of the present invention may contain various drugs depending on the purpose.

The patch of the present invention absorbs moisture or saliva so that the tensile strength can be changed and can be easily removed from the tooth surface.

The following drawings, which are attached to this specification, illustrate preferred embodiments of the present invention, and together with the contents of the present invention serve to further understand the technical spirit of the present invention, the present invention is limited to the matters described in such drawings. It should not be construed as limited.
1 is a graph showing a questionnaire response index of the results of evaluating the removal force of Comparative Example 1 and Examples 1-4 of the present invention.
2 is a view showing an example of the patch 1 for attaching teeth of the present invention. As exemplarily shown in FIG. 2 (a), it may be a patch including the drug layer 10 and the support layer 20, and as shown in FIG. 2 (b), between the drug layer 10 and the support layer 20. In accordance with the purpose it may be provided with another layer separately.

Hereinafter, the following examples and the like will be described in order to describe the present invention in more detail. However, embodiments according to the present invention can be modified in many different forms and the scope of the present invention should not be construed as being limited to the embodiments described below. Embodiments of the present invention are provided by way of example in order to facilitate a specific understanding of the present invention. % In the present specification may refer to weight% unless otherwise specified.

<Manufacture of patches for teeth whitening>

Tooth whitening patch of the comparative example having the composition of Table 1 and the tooth whitening patch of the embodiment having the composition of the following Table 2.

Comparative Example 1 Comparative Example 2 Medicinal layer Hydrogen peroxide 2.9%
Povidone 19.0%
Glycerin 3.0%
Pullulan 1.0%
SPAN80 5.0%
Water etc to 100% Hydrogen peroxide 2.9%
Povidone 19.0%
Glycerin 3.0%
Pullulan 1.0%
SPAN80 5.0%
Water etc to 100% Support layer Ethyl Cellulose 15.0%
Castor oil 10.0%
Ethanol light to 100% Povidone 15.0%
Glycerin 3.0%
Pullulan 1.0%
Water etc to 100%

Example 1 Example 2 Example 3 Example 4 Medicinal layer Hydrogen peroxide 2.9%
Povidone 19.0%
Glycerin 3.0%
Pullulan 1.0%
SPAN80 5.0%
Water etc to 100% Hydrogen peroxide 2.9%
Povidone 19.0%
Glycerin 3.0%
Pullulan 1.0%
SPAN80 5.0%
Water etc to 100% Hydrogen peroxide 2.9%
Povidone 19.0%
Glycerin 3.0%
Pullulan 1.0%
SPAN80 5.0%
Water etc to 100% Hydrogen peroxide 2.9%
Povidone 19.0%
Glycerin 3.0%
Pullulan 1.0%
SPAN80 5.0%
Water etc to 100% Support layer Ethyl Cellulose 12.0%
Hydroxypropylmethyl cellulose 3.0%
Castor oil 15.0%
SPAN80 5.0%
Ethanol light to 100% Ethyl Cellulose 3.0%
Hydroxypropylmethyl cellulose 12.0%
Castor oil 5.0%
SPAN80 15.0%
Ethanol to 100% Ethyl Cellulose 12.0%
Povidone 3.0%
Castor oil 15.0%
SPAN80 5.0%
Ethanol light to 100% Ethyl Cellulose 3.0%
Povidone 12.0%
Castor oil 5.0%
SPAN80 15.0%
Ethanol light to 100%

Comparative Example 1 of Table 1 is a composition for preparing a whitening patch for tooth attachment comprising a general water-insoluble support, which does not include a water-soluble polymer in the support layer, Comparative Example 2 is a whitening patch for tooth attachment containing only a water-soluble polymer in the support layer It is a composition for manufacturing.

Tooth whitening patches having the contents of Tables 1 and 2 were prepared. With the composition, it was prepared according to the method for preparing a backing layer and drug reservoir layer of Preparation Example 1 of Korean Patent No. 10-0816250.

<Release test>

A) operation

Pour 500 mL of 0.9% sodium chloride solution into the test tube and keep the test solution at 32 ± 0.5 ° C during the drug release test. The tooth whitening adhesive is fixed on the upper surface of the disk that can be used as a sinker without absorbing, obstructing or reacting with double-sided tape so that the tooth attaching surface is facing outward, and then the sample attaching face is facing upward. Insert the test tube into the test tube and calculate the drug release time from this moment. The sample-attached disc is aligned parallel to the bottom of the test tube and the blade of the paddle. Adjust the paddle blade to 25 ± 2mm from the sample surface and set the rpm per minute to 25 rpm. When collecting the sample, take 100 mL of the sample solution at 30 minutes after the start of the test at a certain location (1 cm away from the wall of the test tube, above the paddle blade and halfway between the test surface).

B) content measurement

a. reagent

-. Ammonium Molybdate Solution

Add 5.3 g of Ammonium Molybdate to water to make 50 mL.

-. Sodium thiosulfate

Accurately measure 12.41 g of sodium thiosulfate (pentahydrate), dissolve in water, and make 1 L of 0.005 N sodium thiosulfate solution.

b. How to measure concentration

-. 5 mL of 6N-HCl, about 2 g of potassium iodide, and 1 drop of ammonium molybdate solution are added to 100 mL of the sample collected in the release test, and left for about 10 minutes in a dark place. Add 3 mL of starch reagent and titrate the free iodine with 0.005N sodium thiosulfate solution.

0.005N sodium thiosulfate solution 1mL = 0.08505mg H ₂ O ₂

C) results

The release rate was calculated by comparing the amount of hydrogen peroxide in the whole product with the amount of hydrogen peroxide calculated by the release test.

Comparative Example 1 Comparative Example 2 Example 1 Example 2 Example 3 Example 4 Emission Rate (%) 86.5 85.9 87.1 85.7 86.8 85.4

As can be seen in Table 3, the patch for attaching teeth of Example 1-3 has a hydrogen peroxide release rate similar to that of Comparative Example 1, which does not include a water-soluble polymer and Comparative Example 2, which does not include a water-insoluble polymer, respectively. Able to know.

Reverse Release Test

A) operation

Pour 500 mL of 0.9% sodium chloride solution into the test tube and keep the test solution at 32 ± 0.5 ° C during the drug release test. The tooth whitening adhesive is fixed on the upper surface of the disk that can be used as a sinker without being absorbed, disturbed or reacted with double-sided tape so that the tooth attachment surface faces the disk. Calculate the drug release time from this point in the test tube. The sample-attached disc is aligned parallel to the bottom of the test tube and the blade of the paddle. Adjust the paddle blade to 25 ± 2mm from the sample surface and set the rpm per minute to 25 rpm. When collecting the sample, take 100 mL of the sample solution at 30 minutes after the start of the test at a certain location (1 cm away from the wall of the test tube, above the paddle blade and halfway between the test surface).

B) content measurement

a. reagent

-. Ammonium Molybdate Solution

Add 5.3 g of Ammonium Molybdate to water to make 50 mL.

-. Sodium thiosulfate

Accurately measure 12.41 g of sodium thiosulfate (pentahydrate), dissolve in water, and make 1 L of 0.005 N sodium thiosulfate solution.

b. How to measure concentration

-. 5 mL of 6N-HCl, about 2 g of potassium iodide, and 1 drop of ammonium molybdate solution are added to 100 mL of the sample collected in the release test, and left for about 10 minutes in a dark place. Add 3 mL of starch reagent and titrate the free iodine with 0.005N sodium thiosulfate solution.

0.005N sodium thiosulfate solution 1mL = 0.8505mg H ₂ O ₂

C) results

Calculate the release rate by comparing the amount of hydrogen peroxide in the product with the amount of hydrogen peroxide calculated by the release test.

Comparative Example 1 Comparative Example 2 Example 1 Example 2 Example 3 Example 4 Emission Rate (%) 3.2 82.8 3.3 3.8 3.5 3.7

Table 4 shows the drug reverse release rate after attaching the sample to the opposite side of the tooth attachment surface, the result of confirming the content of hydrogen peroxide released through the support layer.

As can be seen in Table 4, in Comparative Example 1 having a support layer that does not contain a water-soluble polymer, the tooth whitening component included in the drug layer was not released through the support layer, but in Comparative Example 2, the drug of the drug layer was passed through the support layer. It can be seen that it is released.

In addition, it was confirmed that Examples 1 to 4 have a similar reverse emission rate as in Comparative Example 1, it can be seen from the results that Examples 1 to 4 are suitable for the role as a support layer of the patch for tooth attachment.

<Removability Survey>

Except for Comparative Example 2 that melts during use, a questionnaire about the ease of removal was conducted for Comparative Example 1 and Examples 1 to 4, which require a post-use removal process. Thirty respondents attached each patch of Comparative Example 1 and Examples 1 to 4 for 15 minutes in groups and then removed Comparative Example 1 or Examples 1 to 4 by brushing. Each group then responded to the question of ease of removal after changing the product.

- Survey response criteria-

5: very convenient to remove and there is no tooth residue

4: It is easy to remove, but there is little residue left.

3: It is not convenient to remove and residue remains uncomfortable.

2: It is inconvenient to remove, leaving a lot of residue.

1: The removal is very inconvenient and very much residue is left.

As can be seen in Figure 1, the role of the support layer is similar to Comparative Example 1 and Examples 1-4, but it can be seen that Example 1 is difficult to remove only by brushing.

Examples 1-4 received excellent scores in the removal evaluation, and users generally evaluated that it could be easily removed by brushing after use.

Tensile strength evaluation

Evaluation instrument: ZWICK universal tester (Zwick, DE / 1494)

Evaluation Method: Comparative Examples 1 to 2 and Examples 1 to 4 were cut into 1 cm X 7 cm, set in jig for tensile strength measurement, and tensile strength was measured at a speed of 0.1 mm / s. The patch of the same size was again set to jig and wetting with sufficient moisture not to flow through the center, and the tensile strength was measured after 1 minute in a 50% relative humidity environment at room temperature and compared with the measured value before contact with water. The patch wetting with sufficient moisture showed little change in water absorption rate for about 10 seconds.

Comparative Example 1 Comparative Example 2 Example 1 Example 2 Example 3 Example 4 Tensile Strength Change (%) -0.8 Not measurable -65.6 -91.3 -67.9 -93.3

(-): The tensile strength is reduced compared to before water absorption.

As can be seen in Table 5, Examples 2 and 4 was found to have the largest change in tensile strength, Examples 1 and 3 had a lower rate of change in tensile strength compared to Examples 2 and 4, but generally showed a high rate of change. It was confirmed to have.

These results show that the change in tensile strength is related to the removal of patches attached to the teeth, and Examples 2 and 4, in which the rate of change in tensile strength is large, show excellent removal ability.

<Disassembly evaluation by brushing>

Two sets of Comparative Example 1 and Examples 1 to 4 were prepared, and one set was shaken in distilled water for 30 minutes, leaving only a support layer, followed by drying and weighing the other set. After 30 minutes in the environment, the brushing machine was used to brush for 3 minutes at a speed of 90 round trips per minute at a load of 250 g. After that, slide glass, brushing chamber and toothbrush were removed and washed with distilled water. The collected cleaning solution was filtered through a mesh having a body size of 1 mm, and the residue was dried and weighed to determine the ratio of the residue to the total weight of the support layer.

As a result, in Comparative Example 1, the residual ratio was 98% or more, but Example 1-4 showed that the tensile strength increased by 50% or more compared with the water absorption. It was confirmed that the present invention excellent in tensile strength change rate can be easily decomposed and removed by brushing.

Claims (12)

Drug layer containing a drug active ingredient; And
Located on one surface of the drug layer, the tooth or patch around the tooth including a support layer that absorbs moisture, the support layer is reduced by 50% or more compared to the moisture absorption. The patch of claim 1, wherein the patch for attaching the tooth or the peripheral portion of the tooth is disassembled and dropped by brushing. According to claim 1, Tensile strength of the support layer of the patch measured in the state of absorbing enough water so that there is no change in water absorption rate for 10 seconds,
A patch characterized in that the tensile strength measured by a Zwick, DE / 1494 universal meter at a temperature of 25 ° C. at a rate of 0.1 mm / s is reduced by more than 50% compared to before water absorption. The patch of claim 1, wherein the support layer has a tensile strength reduction rate of 60 to 95% compared to before water absorption. The patch of claim 1, wherein the support layer of the patch comprises a water-soluble polymer and a water-insoluble polymer. The patch according to claim 5, wherein the weight ratio of the water-soluble polymer and the water-insoluble polymer included in the support layer is 1: 4 to 4: 1 by weight. The method of claim 1, wherein the support layer is cellulose acetate phthalate, shellac, polyvinyl acetate, ethyl cellulose, poly methyl methacrylate, methacryloyl ethyl betaine / methacrylate copolymer (methacryloylethyl betain / methacrylate copolymer), meta At least one water-insoluble polymer selected from the group consisting of a acrylic acid copolymer and an aminoalkyl methacrylate copolymer; And
Polyalkylvinylether-maleic acid copolymer (PVM / MA copolymer), polyvinyl alcohol, polyacrylic acid, poloxamer 407, polyethylene oxide (Polyox), polyvinylpyrrolidone-vinylacetate copolymer (PVP / VA copolymer), polyvinylpyrrolidone (PVP), polyquaternium-11, polyquaternium-39, carboxypolymethylene (Carbomer), hydroxypropylmethyl cellulose, hydroxy A patch comprising all one or more water-soluble polymers selected from the group consisting of ethyl cellulose, hydroxypropyl cellulose, gelatin and sodium alginate. 8. The patch of claim 7, wherein said water insoluble polymer is ethyl cellulose. The patch of claim 1, wherein the drug layer comprises any one or more selected from the group consisting of a tooth whitening component, an ingredient for preventing or improving cavities, a caries prevention component, and a periodontal disease prevention component. The method of claim 9, wherein the tooth whitening component is hydrogen peroxide (cargenamide peroxide), carbamide peroxide (calcium peroxide), sodium percarbonate (sodium percarbonate), sodium perborate (sodium perborate), sodium pyrophosphate at least one peroxide selected from the group consisting of tetrasodium pyrophosphate peroxidate and mixtures thereof;
Sodium Pyrophosphate (TSPP), Sodium Pyrophosphate (SAPP), Sodium Metaphosphate (SHMP), Sodium Tripolyphosphate (STP), Sodium Potassium Pyrophosphate , SKTP), potassium pyrophosphate (TKPP), at least one polyphosphate selected from the group consisting of ultra phosphate acidic sodium meta-polyphosphate and acidic sodium polyphosphate; Or a mixture thereof. The method for preventing or improving caries or cavities of claim 9 is at least one selected from the group consisting of strontium chloride, calcium carbonate, sodium citrate, sodium fluoride, silica, hydroxyapatite, potassium nitrate, and potassium phosphate. Patch. 10. The method of claim 9, wherein the periodontal disease prevention component is bamboo salt, corn unchecked quantitative extract, polycrezulene, tetracycline, chlorohexidine gluconate, cetylpyridium chloride, sanguinarin, triclosan, hubac, sen The patch, characterized in that at least one selected from the group consisting of Tela asiatica, chamomile, latania, myrrh, lettuce, horse riding, green tea, licorice, golden, pogongyeong, and gold and silver coins.

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