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Chemically activated dental bleaching trays

a technology of chemical activation and dental bleaching strips, which is applied in dentistry, tooth rinsing, funeral devices, etc., can solve the problems of difficulty for users to maintain the bleaching strip in its proper position, prone to slippage of conventional bleaching strips, and impediment to successful bleaching

Inactive Publication Date: 2010-02-04
ULTRADENT PROD INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

[0010]Bleaching agent destabilizers may include any known bleaching agent destabilizer that is capable of destabilizing a dental bleaching agent in order to accelerate bleaching. When peroxides are destabilized they more rapidly release oxygen radicals, which are believed to be responsible for the tooth bleaching effect. The bleaching agent destabilizer is advantageously retained on the surface and / or within the polymeric or other moisture resistant barrier layer of the tray or strip prior to use. Upon contact with a peroxide dental bleaching agent in the presence of water, the destabilizer is able to activate or destabilize the bleaching agent, resulting in the formation of free radicals from the peroxide for increased bleaching effect.
[0012]One embodiment provides a tray or strip in which the bleaching composition is prefilled within the tray or pre-applied to the strip. In one manner, this is made possible by providing the moisture-resistant barrier layer including the bleaching agent destabilizer with a protective rupturable membrane disposed between the barrier layer and the dental bleaching composition so as to prevent premature contact between the dental bleaching agent and the bleaching agent destabilizer on or within the barrier layer. In another manner, this may be made possible by providing an anhydrous dental bleaching composition. The anhydrous dental bleaching composition may be disposed directly in contact with the barrier layer, and will not react prematurely because of the anhydrous nature of the bleaching composition. As soon as water is added to the system (e.g., when contacted with saliva by placing the pre-filled tray or strip onto the teeth), reaction between the destabilizer and bleaching composition will begin. Embodiments including an anhydrous dental bleaching composition and no ruptureable membrane should preferably be sealed within a protective package to prevent absorption of water from the surrounding air during shipment and storage.

Problems solved by technology

Because of the generally poor adhesion of bleaching strips to the user's teeth, coupled with their generally flimsy nature, it is often difficult for the user to maintain the bleaching strip in its proper position for the recommended time.
Conventional bleaching strips are prone to slip off the teeth as a result of even minimal movement of the user's mouth, jaw or tongue.
Ultimately, the main impediment to successful bleaching is the failure of users to complete the prescribed bleaching regimen.
If the bleaching apparatus is difficult to install over a person's teeth, requires numerous repetitions to achieve observable results, and / or is uncomfortable to wear, the user may simply give up and prematurely abort the prescribed bleaching regimen.

Method used

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  • Chemically activated dental bleaching trays
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  • Chemically activated dental bleaching trays

Examples

Experimental program
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Effect test

example 1

[0062]A composition for injection molding a silicone dental treatment tray was formed from Shin-Etsu's KEG2000-50A / B two part thermoset silicone material. Part A containing the activator / hardener had a viscosity of about 1700 Pa-s, while part B containing the siloxane had a viscosity of about 1600 Pa-s. At least one part included a platinum catalyst.

[0063]The two parts of the silicone composition were pumped out of storage drums through hoses to a static mixing head where the two parts were mixed together. The mixed silicone material exits the static mixer and was forced into the screw and barrel of the injection molding machine. The mixed silicone material was injected into the heated mold (e.g., about 375° F.), at which point the material quickly polymerized. The tray was removed from the hot mold after polymerization was substantially complete. Exemplary formed trays exhibited excellent adaptability, flexibility, elasticity, and softness, while also being resilient. The molded tr...

example 2

[0064]A composition for injection molding a dental treatment tray was formed from SEBS TPE 45A material. The heated material was pumped so as to be forced into the screw and barrel of the injection molding machine. The material was injected into the mold. The cooled tray was removed from the mold. Exemplary formed SEBS trays exhibited excellent adaptability, flexibility, elasticity, and softness, while also being resilient, similar to the silicone tray of Example 1. The molded trays were translucent, had a Shore A durometer hardness of about 45, an elasticity of about 800% and a wall thickness of about 0.020 inch (0.5 mm). The trays were found to be very comfortable when worn over a person's dental arch, with excellent adaptability, flexibility, elasticity, softness, and resiliency. A bleaching agent destabilizer (e.g., about 0.1 percent to about 5 percent by weight) may be compounded with the SEBS material prior to molding so that the finished trays include the bleaching agent dest...

example 3

[0065]A composition for injection molding a dental treatment tray is formed from VERSAFLEX CL30. The heated TPE material is pumped so as to be forced into the screw and barrel of the injection molding machine. The material is injected into the mold. The cooled tray is removed from the mold. Exemplary formed VERSAFLEX CL30 trays exhibit excellent adaptability, flexibility, elasticity, and softness, while also being resilient, similar to the silicone tray of Example 1. The molded trays are translucent, have a Shore A durometer hardness of about 30, an elasticity of about 780% and a wall thickness of about 0.020 inch (0.5 mm). The trays are very comfortable when worn over a person's dental arch, with excellent adaptability, flexibility, elasticity, softness, and resiliency A bleaching agent destabilizer (e.g., about 0.1 percent to about 5 percent by weight) may be compounded with the VERSAFLEX material prior to molding so that the finished trays include the bleaching agent destabilizer...

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Abstract

Dental treatment trays and strips used to deliver a dental bleaching composition to a person's teeth are formed from a moisture resistant barrier material and include a bleaching agent destabilizer disposed on an inner treatment surface of the barrier layer that is positioned against the person's teeth during use. The bleaching agent destabilizer may be compounded with the moisture resistant material or otherwise disposed relative to the barrier layer so that at least some destabilizer is positioned on the inner treatment surface of the tray or strip so as to contact the dental bleaching composition during use.

Description

RELATED APPLICATIONS[0001]The present application claims the benefit of U.S. patent application Ser. No. 11 / 849,075, filed Aug. 31, 2007 and entitled “DENTAL TREATMENT TRAYS AND STRIPS COMPRISING SILICONE” under 35 U.S.C §119, the disclosure of which is incorporated by reference in its entirety. A petition to convert the above application to provisional status was filed Oct. 26, 2007.BACKGROUND OF THE INVENTION[0002]1. The Field of the Invention[0003]The present invention is in the field of shaped, flexible dental trays and strips used to deliver a dental bleaching composition to a person's teeth. More particularly, the invention relates to flexible dental trays and strips with enhanced user comfort and tooth adhesion.[0004]2. The Relevant Technology[0005]Virtually all people desire white or whiter teeth. A common bleaching method involves the use of a dental tray that is custom-fitted to a person's teeth and that is therefore relatively comfortable to wear. One type of customized t...

Claims

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Application Information

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IPC IPC(8): A61C17/00
CPCA61C19/066A61C19/06A61C2201/00C08L53/02C08L83/04
Inventor LEWIS, PAUL E.ANDERSEN, SCOT N.ALLRED, PETER M.FISCHER, DAN E.
Owner ULTRADENT PROD INC
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