Dental treatment devices

a flexible, dental technology, applied in dental surgery, teeth filling, tooth capping, etc., can solve the problems of affecting the success of bleaching, and affecting the use of bleaching strips

Inactive Publication Date: 2011-07-14
ULTRADENT PROD INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

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.
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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Examples

Experimental program
Comparison scheme
Effect test

example 1

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.

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 trays were tra...

example 2

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 destabiliz...

example 3

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 on th...

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Abstract

Dental treatment trays or strips include a moisture-resistant barrier layer that is flexible so as to conform to a plurality of differently-sized and shaped dental arches during use. The moisture-resistant barrier layer comprised of wax, paraffin wax and / or polyolefin. The dental treatment device also includes a substantially solid dental treatment composition adapted so as to be initially substantially dry to the touch and so as to become sticky and adhesive to dental tissue when moistened. The substantially solid dental treatment composition includes at least one adhesive agent and at least one active agent, such as a dental bleaching agent.

Description

BACKGROUND OF THE INVENTION 1. The Field of the InventionThe 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.2. The Relevant TechnologyVirtually 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 tray is made by vacuum forming a sheet of moisture resistant thermoplastic polymer material over a stone cast of a person's teeth, after which the custom tray may be cut out. Another is customized directly using a person's teeth as a template (e.g., “boil-and-bite” trays). Non-customized trays that approximate the shapes and sizes of a variety of users' dental arches have also been used. A dental bleaching c...

Claims

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Application Information

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Patent Type & Authority Applications(United States)
IPC IPC(8): A61C19/06
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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