JP2009242290A - Composition for bleaching teeth - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a composition for bleaching teeth capable of taking out an appropriate amount of the composition for bleaching teeth on to a mouthpiece. <P>SOLUTION: The composition for bleaching teeth comprises 50-90 wt.% of a polyhydric alcohol, 1-30 wt.% of a thickening agent capable of swelling with the polyhydric alcohol, 0.5-10 wt.% of a calcium chelate agent, and 0.1-2 wt.% of zinc oxide. In order to further enhance bleaching effect, the composition for bleaching teeth preferably contains 2-25 wt.% equivalent to hydrogen peroxide amount of a hydrogen peroxide derivative. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a tooth bleaching composition for bleaching pigmented teeth.

  In general, whiteness of teeth is considered to be an important factor in cosmetics, and there is a strong desire to whiten teeth, especially among young women, and there are cases where teeth are bleached (hereinafter referred to as whitening). It has increased. Whitening is a method of whitening teeth by chemically decomposing the teeth without scraping the teeth. There are two types of whitening methods: “office whitening” performed at the dental clinic and “home whitening” performed at home under the guidance of the dentist. These methods may be used in combination.

  In general, office whitening is a treatment performed by a dentist or dental hygienist using a composition containing high-concentration hydrogen peroxide (see, for example, Patent Documents 1 to 3). It is necessary to go to the hospital one to six times. Although this method can obtain a high bleaching effect in a short time, it is necessary to go to the dental clinic many times. On the other hand, home whitening is a method of bleaching teeth using a tooth bleaching composition containing a low concentration of hydrogen peroxide. If you go to the hospital once or twice to receive an explanation of bleaching, It only takes 2 to 6 hours of bleaching at home for a few weeks. It takes time until the bleaching effect appears, but it is not necessary to go to the hospital frequently, and it is preferred because it can be bleached while sleeping or at work. Yes.

  Home whitening is performed by taking out the tooth bleaching composition filled in the syringe into a mouthpiece dedicated to the patient and attaching the mouthpiece to the tooth. However, since the conventional tooth whitening composition for home whitening is colorless and transparent, it has been difficult to take out an appropriate amount into a mouthpiece. For example, if a tooth bleaching composition is taken out of the mouthpiece more than necessary, the tooth bleaching composition overflows from the mouthpiece when the tooth bleaching composition is placed on the tooth. There is a problem that the gingiva and lips are invaded by the peroxide mixed in the tooth bleaching composition. In order to avoid this, there has also been proposed a tooth bleaching method using titanium dioxide having a photocatalytic action without using a peroxide (see, for example, Patent Document 4). It is not suitable for home whitening because it requires a bowl.

  On the other hand, when the amount taken out to the mouthpiece is small, the composition for tooth bleaching does not reach every corner of the tooth, and as a result, there is a possibility that unevenness occurs in bleaching.

JP-A-8-143436 JP-A-5-320033 JP-A-8-113520 Japanese Patent Laid-Open No. 11-092351

  Then, this invention makes it a subject to provide the composition for tooth bleaching which can take out a suitable amount for the composition for tooth bleaching to a mouthpiece.

  As a result of intensive investigations to solve the above problems, the present inventors have focused on zinc oxide, which is a white pigment that does not react with peroxide and also has no risk of coloring teeth in the bleaching process. If the whitening with zinc oxide is applied to the tooth bleaching composition containing the product, the amount can be easily confirmed when taken out from the syringe to the mouthpiece, and since it is white, it is used with the mouthpiece. However, the present invention was completed by finding that there is no sense of incongruity in appearance.

  That is, the present invention includes polyhydric alcohol: 50 to 90% by weight, thickener capable of swelling in polyhydric alcohol: 1 to 30% by weight, calcium chelating agent: 0.5 to 10% by weight, zinc oxide: 0.1 It is a tooth bleaching composition comprising ˜2% by weight, and it is preferable that the hydrogen peroxide derivative further contains 2-25% by weight in terms of hydrogen peroxide.

  The tooth bleaching composition according to the present invention is an excellent tooth bleaching composition capable of taking out an appropriate amount of a tooth bleaching composition into a mouthpiece.

  Examples of the polyhydric alcohol used in the tooth bleaching composition according to the present invention include substances that have been used in conventional tooth bleaching compositions, such as glycerin, diglycerin, polyglycerin, propylene glycol, dihydric acid. Propylene glycol, polyethylene glycol, monomethyl ether.

  The compounding quantity of the polyhydric alcohol to the composition for tooth bleaching which concerns on this invention is 50 to 90 weight%. If the amount of polyhydric alcohol is less than 50% by weight, the composition becomes too hard to be taken out from the syringe into the mouthpiece, and if it exceeds 90% by weight, the viscosity of the composition is too low and the mouthpiece is Many leaks from the gap between the mouthpiece and the tooth when attached to the tooth.

  As the thickener capable of swelling in polyhydric alcohol used in the tooth bleaching composition according to the present invention, carboxypolymethylene, carboxymethylcellulose, carboxymethylcellulose sodium, carboxymethylcellulose calcium, methylvinylether / maleic anhydride copolymer, poly Examples thereof include sodium acrylate, methylcellulose, hydroxypropylcellulose, polyvinylpyrrolidone and the like.

  The compounding quantity of the thickener which can swell in the polyhydric alcohol to the composition for tooth bleaching which concerns on this invention is 1 to 30 weight%. If the blending amount of the thickener that can swell in polyhydric alcohol is less than 1% by weight, the viscosity of the composition is too low to leak out when the mouthpiece is attached to the tooth, exceeding 30% by weight. Then, this composition is too hard and it becomes difficult to take out from a syringe to a mouthpiece.

  The calcium chelating agent used in the tooth bleaching composition according to the present invention is particularly limited as long as it has an action of chemically incorporating calcium and has an action of floating the adhesion on the tooth surface in combination with the adhesion on the tooth surface. Citric acid, glycine, metaphosphoric acid, tripolyphosphoric acid, tetrapolyphosphoric acid, pyrophosphoric acid, orthophosphoric acid, hexametaphosphoric acid, sodium metaphosphate, sodium tripolyphosphate, sodium tetrapolyphosphate, sodium pyrophosphate, sodium orthophosphate, hexametaphosphoric acid Examples include sodium, potassium metaphosphate, potassium tripolyphosphate, potassium tetrapolyphosphate, potassium pyrophosphate, potassium orthophosphate, potassium hexametaphosphate, and the like.

  The compounding quantity of the calcium chelating agent to the composition for tooth bleaching which concerns on this invention is 0.5 to 10 weight%. If the blending amount of the calcium chelating agent is less than 0.5%, it is difficult to obtain the effect of floating the deposit on the tooth surface, and if it exceeds 10% by weight, the stability of the composition may be lowered, which is not preferable.

  Zinc oxide used in the tooth bleaching composition according to the present invention is a white pigment that does not react with a calcium chelating agent or a peroxide described later, and the composition is white without reducing the stability of the tooth bleaching composition. Can be attached. The compounding quantity of the zinc oxide to the composition for tooth bleaching which concerns on this invention is 0.1-2.0 weight%, More preferably, it is 0.1-1.0 weight%. If the blending amount of zinc oxide is less than 0.1% by weight, the color of the composition is too light and it is difficult to confirm or identify the amount. It becomes too hard to take out from the syringe into the mouthpiece.

  The hydrogen peroxide derivative used in the tooth bleaching composition according to the present invention is one of the components having a bleaching action, and reacts with moisture in saliva when placed on the mouthpiece and mounted on the tooth. There is no particular limitation as long as hydrogen peroxide can be generated or hydrogen peroxide can be generated when an aqueous solution is formed. Specific examples include hydrogen peroxide, polyvinyl pyrrolidone peroxide, urea peroxide, sodium borate, and sodium percarbonate.

  The blending amount of the hydrogen peroxide derivative in the tooth bleaching composition according to the present invention is 2 to 25% by weight in terms of hydrogen peroxide. If it is less than 2% by weight, it is difficult to obtain the effect, and even if it exceeds 25% by weight, no significant difference is seen in the bleaching effect, which is not advantageous from the viewpoint of safety.

  The composition for tooth bleaching according to the present invention essentially comprises the above-mentioned components, but in addition to this, various additives such as a pH adjuster, a hypersensitivity preventive, a preservative, and a fragrance are not impaired in the bleaching effect. You may make it contain arbitrarily.

  The present invention will be described in more detail with reference to the following examples, but the present invention is not limited to these examples.

According to the composition shown in Table 1, a tooth bleaching composition was prepared.
<Confirmation of effect>
Each tooth bleaching composition having the composition shown in Table 1 was taken out of a dedicated tray and then attached to the teeth, and the ease of removal when overflowing was confirmed.

カルボキシビニルポリマー：商品名 カーボポール，日光ケミカルズ社製
ポリビニルピロリドン：商品名 Ｋ−９０，株式会社日本触媒製 <Table 1> (% by weight)

Carboxyvinyl polymer: Trade name Carbopol, manufactured by Nikko Chemicals Co., Ltd. Polyvinylpyrrolidone: Trade name K-90, manufactured by Nippon Shokubai Co., Ltd.

  The tooth bleaching composition containing zinc oxide shown in Examples 1 to 14 could be taken out into the mouthpiece while checking the amount. Moreover, even if the tooth bleaching composition overflows from the mouthpiece when it is taken out more than necessary and attached to the tooth, the user can easily notice and remove it. On the other hand, in Comparative Examples 1 to 3 in which no zinc oxide was blended, the tooth bleaching composition was colorless and transparent, so that it was taken out to the mouthpiece in an excessive amount. In addition, when the mouthpiece is attached to the tooth, the tooth bleaching composition overflows from the mouthpiece, so that it is difficult to notice and it is difficult to remove because it is transparent.

Claims (2)

Polyhydric alcohol: 50 to 90% by weight, thickener capable of swelling in polyhydric alcohol: 1 to 30% by weight, calcium chelating agent: 0.5 to 10% by weight, zinc oxide: 0.1 to 2% by weight A composition for tooth bleaching. The tooth bleaching composition according to claim 1, further comprising 2 to 25% by weight of a hydrogen peroxide derivative.