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Tooth bleaching

A technology of teeth and uses, applied in the field of oral compositions, can solve the problems of stains, insecurity, damage to teeth and/or oral tissues, etc.

Inactive Publication Date: 2007-05-16
COLGATE PALMOLIVE CO
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0015] 2) Internal smudges
[0040] Most of the prior art methods / techniques mentioned above involve the use of peroxides and / or other agents at concentrations that are not safe for "home use" by private consumers due to the risk of damage to teeth and / or oral tissue

Method used

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  • Tooth bleaching

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0194] Preparation of hydroxyapatite tablets

[0195] Hydroxyapatite tablets were prepared by compressing 250 mg of hydroxyapatite in a tablet mold at a pressure of approximately 5900 kilograms (13000 Lbs) for 5 minutes. The tablets were then sintered at 600°C for 4 hours and finally hydrated with sterile deionized water.

[0196] Sterilization of Hydroxyapatite Tablets

[0197] HA tablets were sterilized at 180°C for 2 hours, hydrated with sterile deionized water, and placed in the caps of Nunc test tubes (10 ml volume).

[0198] Contamination of cattle teeth:

[0199] The bovine teeth were stained by immersing them in staining solution A at 37°C until the surface of the teeth turned brown.

[0200] Contamination of HA tablets with film

[0201] The HA tablet was immersed in 2 ml of contamination solution B placed in a Nunc test tube and rotated at an angle of approximately 30° for 5 seconds at 37° C. at 10 second intervals. Change the contaminated solution every...

Embodiment 1

[0216] Bleaching foreign tooth stains with glucose oxidase (GOX)

[0217] Bovine teeth were dipped in contamination solution A containing tea, coffee, milk and saliva at 37°C until the tooth surface turned brown, as described in the Materials and Methods section. and treated with solutions A and B and buffer as described below.

[0218] Solution A

[0219] enzyme

[0220] Two samples were prepared in Britton-Robinson buffer (pH 6.5).

[0221] Glucose solutions were prepared one day earlier and kept at 4°C.

[0222] Glucose oxidase was derived from Aspergillus niger.

[0223] Each solution was pre-incubated at 37°C for 15 minutes prior to testing.

[0224] Two teeth were placed in test tubes containing 5 ml of solution A and 5 ml of solution B, respectively, and incubated at 37°C for 60 minutes. The solution was stirred using a small magnetic bar. Both samples were treated with buffer and oxidase+glucose separately in this way. Treatments were repe...

Embodiment 2

[0231] Bleaching of extraneously contaminated hydroxyapatite tablets with L-amino acid oxidase

[0232] Exogenous contamination of hydroxyapatite (HA) tablets was carried out according to the method of Stookey (Stookey G.K. et al., "In vitro stain removal with dental cleaning water", J. Dent. Res. 61, p. 1236 (1982)).

[0233] Sterilized HA tablets (simulating the properties of human tooth enamel) as described in the Materials and Methods section (mimicking the properties of human tooth enamel) were immersed in a contamination solution containing tea, coffee, mucin, and M. luteus at 37 °C at 10-second intervals 5 seconds in B. HA tablets were incubated for 3 days. After contamination, the HA tablets were air dried and washed with deionized water.

[0234] Chromatographically pure L-amino acid oxidase from Trichoderma harzianum devoid of catalase activity was incubated with a solution of L-arginine prepared in 0.1 M sodium citrate buffer, pH 8.5.

[0235] Two of the contam...

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Abstract

The present invention aims to provide safe products for bleaching teeth. Oral compositions comprising at least one oxidoreductase fulfil criteria without the presence of peroxide or with only very little peroxide present. The invention also relates to an oral care product comprising the oral composition of the invention, a method of bleaching teeth, a method for using said oral care products and the use of oxidoreductases for oxidation of teeth stains.

Description

field of invention [0001] The present invention relates to an oral composition for bleaching teeth containing no peroxide or very little peroxide, an oral care product containing the oral composition of the present invention, a method for bleaching teeth, using said Methods of oral care products and use of peroxidases to oxidize tooth stains. Background of the invention [0002] Most people want to have a mouth full of attractive white teeth, because teeth make up an important part of the overall picture of the face when smiling. In contrast, heavily soiled teeth are unhealthy and in some cases even have an unattractive "look". [0003] For many years, crowns or dentures have been seen as a way to avoid tooth staining due to, for example, yellowing of the teeth due to advancing age, contamination of the teeth due to long-term intake of the antibiotic tetracycline during childhood, or from drinking coffee, smoking / chewing tobacco, etc. Only tool fo...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): A61K8/66A61Q11/00A61Q11/02A61K8/22A61K8/46A61K8/49
CPCA61K8/66A61Q11/00
Inventor D·阿斯林R·苏奇亚A·嘉法S·F·史密斯
Owner COLGATE PALMOLIVE CO
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