KR102474196B1 - Functional oral composition containing glutamine to relieve dentin hypersensitivity - Google Patents

Abstract

The present invention relates to an oral composition containing 5 to 10 wt% of glutamine. The present invention provides a toothpaste composition which firmly forms a plug chemically similar to dentin and dentinal tubules using proprietary amino acids, and which can effectively alleviate symptoms of sensitive teeth through infiltration into dentinal tubules from the outside of teeth and from the dentin surface, blockade, and mineralization.

Description

Functional oral composition containing glutamine to relieve dentin hypersensitivity}

The present invention relates to a functional oral composition for relieving cold tooth symptoms containing glutamine, and more particularly, to an oral composition having a function for relieving cold tooth symptoms through alteration of bodily fluid flow in the dentinal tube (Dentinal Tubule Occlusion).

BACKGROUND OF THE INVENTION Here, background art related to the present disclosure is provided, and they are not necessarily meant to be prior art.

Toothache (Dentin Hypersensitivity; DH) is when the tooth surface, which is covered with enamel, wears out or cracks in response to heat, evaporation, touch, osmosis, or chemical stimulation, exposing the dentinal tubules and becoming vulnerable to external stimuli to the external environment. It is defined as a brief, sharp pain that occurs in exposed dentin as a symptom of very sensitive teeth.

In 2010, the prevalence of dentin hypersensitivity was assessed based on a clinical survey and self-report questionnaire of over 3500 young adults from a wide range of seven European countries. Results have reported that up to 42% of young adults in Europe are affected by this condition. (Prior art literature; Non-Patent Document 1) It is also a common oral health problem in Korea, as it is investigated that 2 out of 3 adults suffer from it as of 2019.

The most widely accepted pain theory is the hydrodynamic theory first proposed by Gysi (prior art document; non-patent document 2) and later proven by Brønnström (prior art document; non-patent document 3-5). . This supports the theory that sensitive dentin is based on stimulation-induced fluid flow in the dentinal tubules and consequent nociceptor activation in the pulp/dentin interface region.

Human studies have shown that dentinal tubular patency is an important characteristic of apnea, and that there is a significant positive correlation between dentinal tubule density and the pain response elicited from the exposed cervical dentin surface. Further studies of extracted teeth provided strong scientific evidence that, compared to unsensitized teeth, sensitive teeth had eight times more and twice as wide tubules in the buccal and cervical dentin regions. (Prior art document; non-patent document 6) (see FIGS. 1 and 2).

Cold The dentin surface of the tooth must be exposed (lesion localization) for this symptom to occur, which is caused by cervical enamel abrasion or gingival recession. Then opening of many dentinal tubules in close proximity to one another, the opening or opening of the dentinal tubules from the pulp to the oral environment (Lesion initiation), usually caused by acidic foods or beverages.

The toothpaste we use every day is the most common agent used to treat cold tooth symptoms (dentin hypersensitivity), and most of the toothpastes sold for dentin hypersensitivity in Korea aim to control or block the pulpal nerve response (Pulpal Nerve Response). have. Desensitizers, such as potassium ions, can diffuse along the tubules and increase the potassium ion concentration around the pulp, thereby reducing nerve excitability in the pulp, thereby inhibiting or blocking nerve function in the pulp. (Prior art literature; non-patent literature 7)

However, in a recently published systematic review of the efficacy of potassium ions in the treatment of dentin hypersensitivity, it was reported that the evidence of the efficacy of potassium ions was weak or insufficient. (Prior art literature; non-patent literature 8)

The most direct way to relieve pain caused by dentin hypersensitivity is occlusion of the dentinal tubules leading from the dental pulp to the oral environment. Nerve stimulation can be reduced by blocking or reducing the diameter of the dentinal tubules to inhibit fluid movement.

Conventionally, tricalcium phosphate included in toothpaste compositions binds to peptides to induce remineralization on the surface of dentinal tubules and dentin, and promotes dentin regeneration in the dental pulp / pulp cavity by promoting differentiation of odontoblasts by the peptides. A study was conducted. (Prior art literature, Patent Document 1) However, as shown in Figure 3, dentin blast cells are regularly arranged on the surface layer inside the pulp cavity and are cells that form dentin, so as in Patent Document 1, peptides (two or more amino acids bonded) The promotion of dentin regeneration through the toothbrush can only be done within the pulp/pulp cavity where the dentin hair cells are located, so it takes a long time to relieve the symptoms of cold teeth, and the effect may be insignificant depending on the brushing method.

1. Republic of Korea Patent Registration No. 10-1956579 (2019.03.05.)

1. West N X, Sanz M, Lussi A, Bartlett D, Bouchard P and Bourgeois D (2013). Prevalence of dentine hypersensitivity and study of associated factors: a European population-based cross-sectional study. J Dent. 41(10): 841-851. 2. Gysi A (1900). An attempt to explain the sensitivity of dentine. Brit J Dental Sci. 43: 865-868. 3. Brønnström M (1963)a. A hydrodynamic mechanism in the transmission of pain producing stimuli through the dentine. In: Sensory mechanisms in dentine, ed. D. J. Anderson. Oxford: Pergamon Press, pp. 73??9. 4. Brønnström M (1965). The surface of sensitive dentine. An experimental study using replication. Odontol Revy. 16(4): 293-299. 5. Brønnström M (1966). Sensitivity of dentine. Oral Surg Oral Med Oral Pathol. 21(4): 517-526. 6. Absi E G, Addy M and Adams D (1987). Dentine hypersensitivity. A study of the patency of dentinal tubules in sensitive and non-sensitive cervical dentine. J Clin Periodontol. 14(5): 280-284. 7. Narhi M, Jyvasjarvi E, Virtanen A, Huopaniemi T, Ngassapa D and Hirvonen T (1992). Role of intradental A- and C-type nerve fibers in dental pain mechanisms. Proc Finn Dent Soc. 88 Suppl 1: 507-516. 8. West N X, Seong J and Davies M (2015)c. Management of dentine hypersensitivity: efficacy of professionally and self-administered agents. J Clin Periodontol. vol 42 Suppl 16., pp. S256-302.

The present invention is to provide an oral composition that can effectively alleviate the symptoms of cold teeth through the method of closing the dentinal tubules.

However, the objects of the present invention are not limited to the above-mentioned objects, and other objects not mentioned will be clearly understood by those skilled in the art from the description below.

The present invention provides an oral composition comprising 5 to 10 wt% of glutamine (Glutamine).

In addition, the present invention provides an oral composition comprising functional ingredients including glutamine (Glutamine), sodium hydrogen carbonate (sodium hydrogen carbonate) and calcium carbonate (calcium carbonate).

In addition, the functional component is included in 22.5 to 35% by weight, and the content of sodium bicarbonate and calcium carbonate in the functional component is equal to or higher than that of glutamine.

In addition, the mixing ratio of glutamine: sodium hydrogen carbonate: calcium carbonate in the functional component is characterized in that 1: 1.5 ~ 2: 1 ~ 1.5.

In addition, the oral composition is characterized in that the toothpaste composition further comprises at least one member selected from the group consisting of a wetting agent, a viscosity modifier, a surfactant, a fluorine agent, a pH modifier, a preservative and a flavoring agent.

The present invention firmly forms a plug chemically similar to dentin and dentinal tubules using a unique amino acid, and effectively treats cold tooth symptoms through penetration, blockade, and mineralization of dentinal tubules from the outside of the tooth and from the dentin surface. It is to provide a composition for oral cavity that can be alleviated.

1 is an example showing dentinal tubules of a cold tooth exposed as an electron microscope image at 5000x magnification.
FIG. 2 is an example showing unexposed and unstained dentinal tubules as an electron microscope image magnified 5000 times.
3 is an image showing the structure of a tooth.
Figure 4 is an electron microscope image after treatment with toothpaste compositions according to Examples and Comparative Examples.

All technical and scientific terms used herein have the same meaning as commonly understood by a person of ordinary skill in the art unless otherwise specified. Also throughout this specification and claims, the terms "comprise", "comprising", and "comprising", unless stated otherwise, are meant to include a stated object, step or group of objects, and steps, and any other It is not intended to exclude an object, step or group of objects or steps.

Prior to describing the present invention in detail below, it is understood that the terms used herein are intended to describe specific embodiments and are not intended to limit the scope of the present invention, which is limited only by the appended claims. shall.

On the other hand, various embodiments of the present invention can be combined with any other embodiments unless clearly indicated to the contrary. Any feature indicated as being particularly desirable or advantageous may be combined with any other features and characteristics indicated as being particularly desirable or advantageous. Hereinafter, embodiments of the present invention and effects thereof will be described with reference to the accompanying drawings.

An oral composition according to an embodiment of the present invention includes a functional component including glutamine, sodium hydrogen carbonate and calcium carbonate, a highly soluble compound of glutamine and sodium hydrogen carbonate ( Glutamine Bicarbonate) is physically surrounded by insoluble calcium carbonate particles to form a paste-type plug compound having adhesive properties. This paste-type plug compound penetrates and adheres to the inner wall of the dentinal tubules to block them, thereby providing rapid and direct relief from the symptoms of cold teeth. In addition, the alkaline paste-type plug compound reacts with calcium and phosphate ions in saliva (saliva) and dentine tubule fluid after sealing the dentinal tubules to form a plug chemically similar to dentin and dentinal tubules, thereby changing over time. By more firmly occluding the dentinal tubules, the symptoms of cold lice can be further alleviated. The chemically similar reason here is that calcium carbonate forms 'hydroxyapatite' (Hydroxyapatite (HAp, Ca ₁₀ (PO ₄ ) ₆ (OH) ₂ )) as a precursor. At this time, glutamine, an essential amino acid, plays an important role.

Glutamine included in the oral composition is a neutral amino acid having the formula C ₅ H ₁₀ N ₂ O ₃ and is soluble in water. More specifically, it is good to use Laevorotatory form of glutamine (L-Glutamine) to facilitate the production of Glutamine Bicarbonate, which is essential for calcium carbonate to be transformed into hydroxyapatite.

The oral composition contains 22.5 to 35% by weight of the functional component including glutamine, sodium bicarbonate and calcium carbonate, wherein the content of sodium bicarbonate and calcium carbonate in the functional component is equal to or higher than that of glutamine. And, more specifically, the mixing ratio of glutamine: sodium bicarbonate: calcium carbonate is 1: 1.5 to 2: 1 to 1.5. Preferably, the functional component is included in an amount of 30 to 35% by weight, and in this case, the mixing ratio of glutamine: sodium hydrogen carbonate: calcium carbonate is preferably 1: 1.5 to 1.8: 1 to 1.2.

Unlike Patent Document 1, which forms a thin film on the surface of dentin and induces remineralization (remineralization) by including peptides and tricalcium phosphate, the oral composition according to the present invention, the paste-type plug compound directly penetrates into the dentinal tubules to form a plug It is characterized by blocking by forming. In the present invention, even though a separate phosphoric acid component is not included, calcium ions and phosphate ions already contained in saliva (saliva) and fluid in the dentinal tubule react with the paste-type plug compound to be mineralized to form a plug (stopper). There is a difference. Since this forms a plug chemically similar to the user's dentin and dentinal tubules, it is possible to effectively prevent the recurrence of cold lice symptoms by more firmly blocking the dentinal tubules.

When added in the form of a peptide, since the peptide structure itself is so stable, an additional hydrolysis process must occur to separate/decompose amino acids therein. Therefore, it is difficult to produce a paste-type plug compound (Glutamine Bicarbonate) as in the present invention, and accordingly, hydroxyapatite (Ca ₁₀ (PO ₄ ) ₆ (OH) ₂ ) transformation of calcium carbonate also becomes difficult.

Therefore, a single amino acid is advantageous for making a paste-like plug with adhesive properties (primary blockade), and produces a paste-like plug compound (Glutamine Bicarbonate) more quickly and easily, which is an advantageous condition for transforming calcium carbonate into more durable hydroxyapatite makes

The oral composition may be a toothpaste composition, but is not limited thereto. A gargling liquid containing the functional ingredient or a polishing paste used after scaling in a dental office can be used in parallel for a more pronounced symptom relief effect. For example, in the case of a toothpaste composition, in addition to the functional component, a humectant (eg, water, benzyl alcohol, sorbitol, saccharin, sucralose, glycerin, propylene glycol or a mixture thereof), a viscosity modifier (eg, xanthan gum, carboxylate) Methyl cellulose, carrageenan, carboxyvinyl polymer, sodium alginate, silica of 8 μm or less or mixtures thereof), surfactants (eg, cocamidopropyl betaine, polyethylene glycol, phloxamer, sodium lauryl sulfate or mixtures thereof), fluorine agent (sodium fluoride, fluorinated amine, sodium monofluorophosphate), pH adjusting agent (e.g., sodium hydroxide, potassium hydroxide, sodium phosphate, disodium phosphate, trisodium phosphate, sodium pyrophosphate, sodium citrate), preservative ( For example, zinc oxide, titanium oxide, citric acid, succinic acid, parabens, tartaric acid, ethylparaben parahydroxybenzoate, natrotics or mixtures thereof) and flavoring agents (eg saccharin, aspartame, licorice acid, peppermint oil, Menthol, carbon, spearmint oil, or a mixture thereof) further includes at least one selected from the group consisting of.

<Examples and Comparative Examples>

A toothpaste composition containing 5wt% and 10wt% of glutamine (Example 1-2), a toothpaste composition containing 1wt% and 3wt% of glutamine (Comparative Example 1-2), a silica-based fluoride (silica -based fluoride) containing (fluorine 1450 ppm) (Comparative Example 3), a toothpaste composition (Comparative Example 4) containing 5wt% of potassium nitrate (potassium nitrate) was prepared. The toothpaste composition was added with the same ratio of a wetting agent, an abrasive, a viscosity modifier, a surfactant, a preservative and a flavoring agent as the remaining ingredients except for the above composition.

The fluorine-containing toothpaste composition was prepared as a comparative example (Comparative Example 3) as a general toothpaste having no effect of alleviating the symptoms of toothache, and it was confirmed whether or not the toothpaste composition according to the example had an effect of alleviating the symptoms of toothache.

In addition, the reason why teeth ache when eating cold food in general is that the nerves in the pulp are stimulated. (Comparative Example 4) to compare the significance of the effect of alleviating the symptoms of ache.

In addition, the critical significance of limiting the glutamine content was confirmed by preparing a comparative example (Comparative Example 1-2) in which glutamine was included outside the range suggested in the present invention.

The composition of the dentifrice composition is shown in Table 1 below. Wetting agent 1 contains glycerin and water (glycerin: water = 1.3: 1), wetting agent 2 contains sorbitol and propylene glycol, viscosity modifier contains CMC, silica and xanthan gum, and fluorine contains sodium monofluorophosphate The surfactant includes PEG-60 hydrogenated castor oil, the pH adjusting agent includes sodium hydroxide and sodium phosphate, the preservative includes titanium dioxide and parabens, and the flavoring agent contains a flavoring agent and saccharin, and the mixing ratio of each formulation component was prepared in the same way.

Example 1 Example 2 Comparative Example 1 Comparative Example 2 Comparative Example 3 Comparative Example 4 humectant 1 54.0 42.5 58.0 56.0 54 54.0 humectant 2 14.2 14.2 14.2 14.2 14.2 14.2 Functional
ingredient sodium bicarbonate 10.0 15.0 10.0 10.0 15 10.0 calcium carbonate 7.5 10.0 7.5 7.5 7.5 7.5 glutamine 5.0 10.0 1.0 3.0 - - potassium nitrate - - - - 5.0 viscosity modifier 3.8 3.8 3.8 3.8 3.8 3.8 Fluoride 1.08 1.08 1.08 1.08 1.08 1.08 Surfactants 1.0 1.0 1.0 1.0 1.0 1.0 pH modifier 1.8 1.8 1.8 1.8 1.8 1.8 antiseptic 0.5 0.5 0.5 0.5 0.5 0.5 flavoring agent 1.12 1.12 1.12 1.12 1.12 1.12

<Experimental example>

(1) Electron microscope measurement

First, dentine specimens were prepared (dentine slices), soaked in 6% citric acid to open dentinal tubules, and washed with an ultrasonic cleaner. Hartmann's solution [sodium chloride (6 g, 102.6 mmol), sodium lactate (3.12 g, 27.8 mmol), potassium chloride (0.4 g, 5.3 mmol) calcium chloride (0.27 g, 2.4 mmol) in water (1000 mL)] for 2 minutes and washed with artificial saliva solution.

Treatment of dentin specimens with the toothpaste composition of Example 1 and Comparative Example 3 for 30 minutes (after applying artificial saliva to the dentin specimen, shaker for 30 minutes using a slurry mixed with artificial saliva and toothpaste composition in a ratio of 2: 1) After washing with flowing distilled water (deionised water) and drying at room temperature, it was observed with an electron microscope (approximately 2000 times).

4 shows an electron microscope image after treatment with the dentifrice composition according to Examples and Comparative Examples. As shown in Figure 4, in the case of the example treated with a toothpaste composition containing 5% to 10% glutamine, it can be confirmed that the dentinal tubules are closed, and excellent dentinal tubule closure even when compared to the conventional shirin functional toothpaste (Comparative Example 4) It can be seen that it has an effect.

In the case of Example 2 (10% glutamine), it can be confirmed that dentinal tubule occlusion is almost the same as that of Example 1 (5% glutamine), so it is judged that there is no need to include glutamine in excess of 10% , It is difficult to mix with a composition exceeding 10%, and in the case of Comparative Example 1-2 containing less than 5% (1% to 3%) glutamine, dentinal tubule occlusion is not properly achieved, so 5% to Inclusion of 10% glutamine was found to be optimal.

(2) Clinical survey (participant survey)

60 volunteers who complained of symptoms were divided into 6 groups of 10 each, and Example 1 (5% glutamine), Comparative Example 3 (Fluoride 1450 ppm), and Comparative Example 4 (5% potassium nitrate) were used as substitutes for toothpaste for a day. It was used twice for 2 minutes. After using it for 2 weeks, a questionnaire was evaluated on a 5-point Likert scale. The results are shown in Table 2 below.

* Likert scale: After using the new toothpaste, the symptoms of numbness were alleviated.

1: Strongly disagree

2: Disagree (disagree)

3: Nether agree nor disagree

4: Agree

5: Strongly agree

Total Score Average Score Example 1 4,4,3,4,5,5,5,5,4,5 4.4 Example 2 5,5,5,5,3,5,5,5,4,5 4.7 Comparative Example 1 3,3,2,3,3,3,3,3,5,2 3.0 Comparative Example 2 2,5,5,2,3,4,5,3,3,3 3.5 Comparative Example 3 3,4,3,4,4,4,2,4,3,3 3.4 Comparative Example 4 5,3,3,4,3,4,4,2,5,3 3.6

As shown in Table 2, the functional ingredients including glutamine, sodium bicarbonate and calcium carbonate are included in an amount of 22.5 to 35% by weight, and the mixing ratio of glutamine: sodium bicarbonate: calcium carbonate is 1: 1.5-2: 1-1.5 It can be seen that the effect of alleviating the symptoms of a cold sore in Example 1-2 is very excellent compared to Comparative Example 1-4, and in particular, the functional component contains 30 to 35% by weight, and a mixture of glutamine: sodium bicarbonate: calcium carbonate It can be seen that the ratio of 1: 1.5 to 1.8: 1 to 1.2 in Example 2 is the most excellent symptom alleviation effect.

The features, structures, effects, etc. illustrated in each of the above-described embodiments can be combined or modified with respect to other embodiments by those skilled in the art in the field to which the embodiments belong. Therefore, contents related to these combinations and variations should be construed as being included in the scope of the present invention.

Claims (5)

Contains functional ingredients that form a paste-type plug compound, including glutamine, sodium hydrogen carbonate and calcium carbonate;
The oral composition, characterized in that the mixing weight ratio of glutamine: sodium bicarbonate: calcium carbonate in the functional component is 1: 1.5 ~ 2: 1 ~ 1.5.
delete According to claim 1,
Oral composition, characterized in that the functional component is contained in 22.5 to 35% by weight.
delete According to claim 1,
The oral composition is characterized in that the toothpaste composition further comprises at least one member selected from the group consisting of a wetting agent, a viscosity modifier, a surfactant, a fluorine agent, a pH adjusting agent, a preservative and a flavoring agent Oral composition.

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