Delivery system for a tooth whitener using a strip of material having low flexural stiffness

• US 5,879,691 A
• Filed: 06/06/1997
• Issued: 03/09/1999
• Est. Priority Date: 06/06/1997
• Status: Expired due to Term

• Current Assignee: The Procter & Gamble Company
• Original Assignee: The Procter & Gamble Company
• Inventors: Rohman, Frederick J., Dirksing, Robert S., Sagel, Paul A.
• Primary Examiner(s): Rose, Shep K.
• Application Number:
  US08/870,330
• Time in Patent Office: 641 Days
• Field of Search: 424/401, 424/49-53, 433/245
• US Class Current: 424/401
• CPC Class Codes: A61C 19/063 Medicament applicators for teeth or gums, e.g. treatment with fluorides
• CPC Class Codes: A61C 19/066 Bleaching devices; Whitening agent applicators for teeth, e.g. trays or strips
• CPC Class Codes: A61K 6/30 Compositions for temporarily or permanently fixing teeth or palates, e.g. primers for dental adhesives
• CPC Class Codes: C08L 23/06 Polyethene
• CPC Class Codes: C08L 33/08 Homopolymers or copolymers of acrylic acid esters
• CPC Class Codes: C08L 71/02 Polyalkylene oxides

Abstract

A delivery system for a tooth whitening substance includes a strip of material having a flexural stiffness less than about 50 grams/centimeter as measured on a Handle-O-Meter per ASTM test method D2923-95. The strip of material is readily conformable without permanent deformation to a shape of a tooth when the delivery system is placed thereagainst. The tooth whitening substance is applied to the strip of material such that when the delivery system is placed on a surface of the tooth, the substance contacts the surface providing an active onto the surface. The substance also provides adhesive attachment between the strip of material and the surface to hold the delivery system in place for a sufficient time to allow the active to act upon the surface. A method of delivery includes pre-coating the strip of material, having the wearer apply substance to the strip of material, or having the wearer apply the substance directly to the surface before applying a strip of material.

Claims

1. A delivery system for a tooth whitening substance, wherein the delivery system is substantially transparent and is almost unnoticeable when worn, comprising:

a. a strip of material having a flexural stiffness less than about 50 grams/centimeter as measured on a Handle-O-Meter per ASTM test method D2923-95, said strip of material being readily conformable without permanent deformation to a shape of a tooth when said delivery system is places thereagainst; and

b. a tooth whitening substance applied to said strip of material such that when said delivery system is placed on a front surface of said tooth, said substance contacts said surface providing an active onto said surface, said substance also providing adhesive attachment between said strip of material and said surface to hold said delivery system in place for a sufficient time to allow said active to act upon said surface.

2. The delivery system of claim 1 wherein said substance is a gel.

3. The delivery system of claim 1 wherein said substance is a substantially uniform continuous coating on said strip of material.

4. The delivery system of claim 1 wherein said strip of material has shallow pockets on a substance-coated side of said strip of material, said shallow pockets having said substance located therein.

5. The delivery system of claim 1 wherein said strip of material is a piece of high density polyethylene film having a nominal film thickness of about 0.013 mm.

6. The delivery system of claim 1 wherein said strip of material is substantially flat and rectangular in shape with rounded comers, said strip of material including said substance applied thereon having an overall thickness less than about 1 mm.

7. The delivery system of claim 1 wherein said strip of material has a length sufficient to cover a plurality of adjacent teeth while conforming to the curvature of the wearer'"'"'s mouth and gaps between said plurality of adjacent teeth.

8. A method of delivering a tooth whitening substance to a front surface of a tooth, said method comprising the step of:

a. applying said substance onto a comfortable strip of material having a flexural stiffness less than about 50 grams/centimeter as measured on a Handle-O-Meter per ASTM test method D2923-95; and

b. applying said conformable strip of material with said substance thereon to said surface without permanent deformation of said strip of material such that said substance contacts said surface, said substance providing an active onto said surface, said substance also providing adhesive attachment between said strip of material and said surface to hold said delivery system in place for a sufficient time to allow said active to act upon said surface.

9. The method of claim 8 wherein said substance is a gel.

10. The method of claim 8 wherein said strip of material is a piece of high density polyethylene film having a nominal film thickness of about 0.013 mm.

11. The method of claim 8 wherein said strip of material is substantially flat and rectangular in shape with rounded corners, said strip of material including said substance applied thereon having an overall thickness less than about 1 mm.

12. The method of claim 8 wherein said strip of material has a length sufficient to cover a plurality of adjacent teeth while conforming to the curvature of the wearer'"'"'s mouth and gaps between said plurality of adjacent teeth.

13. The method of claim 8 wherein said strip of material and said substance are substantially unnoticeable by others when worn.

14. A method of delivering a tooth whitening substance to a front surface of a tooth, said method comprising the steps of:

a. applying said substance onto said surface of said tooth;

b. applying a conformable strip of material having a flexural stiffness less than about 50 grams/centimeter, as measured on a Handle-O-Meter per ASTM test method D2923-95, over said substance on said surface permanent deformation of said strip of material, said substance providing an active onto said surface, said substance also providing adhesive attachment between said strip of material and said surface to hold said delivery system in place for a sufficient time to allow said active to act upon said surface.

15. The method of claim 14 wherein said substance is a gel.

16. The method of claim 14 wherein said strip of material is a piece of high density polyethylene film having a nominal film thickness of about 0.013 mm.

17. The method of claim 14 wherein said strip of material has a length sufficient to cover a plurality of adjacent teeth while conforming to the curvature of the wearer'"'"'s mouth and gaps between said plurality of adjacent teeth.

18. The method of claim 14 wherein said strip of material and said substance are substantially unnoticeable by others when worn.

19. A delivery system for a tooth whitening substance, wherein the delivery system is substantially transparent and is almost unnoticeable when worn, comprising:

a. a strip of material having a flexural stiffness less than about 0.6 grams/centimeter as measured on a Handle-O-Meter per ASTM test method D2923-95, said strip of material being readily conformable without permanent deformation to a shape of a tooth when said delivery system is place thereagainst; and

b. a tooth whitening substance applied to said strip of material such that when said delivery system is placed on a front surface of said tooth, said substance contacts said surface providing an active onto said surface, said substance also providing adhesive attachment between said strip of material and said surface to hold said delivery system in place for a sufficient time to allow said active to act upon said surface.

20. A delivery system for a tooth whitening substance comprising:

a. a strip of material having a flexural stiffness less than about 50 grams/centimeter as measured on a Handle-O-Meter per ASTM test method D2923-95, said strip of material being readily conformable without permanent deformation to a shape of a tooth when said delivery system is placed thereagainst and said strip of material containing an array of shallow pockets; and

b. a tooth whitening substance applied to said strip of material such that when said delivery system is placed on a surface of said tooth, said substance contacts said surface providing an active onto said surface, said substance also providing adhesive attachment between said strip of material and said surface to hold said delivery system in place for a sufficient time to allow said active to act upon said surface.

21. A delivery system for a tooth whitening substance comprising:

a. a strip of material made of polyethylene; and

b. a tooth whitening substance applied to said strip of material such that when said delivery system is placed on a surface of said tooth, said substance contacts said surface providing an active onto said surface, said substance also providing adhesive attachment between said strip of material on a said surface to hold said delivery system in place for a sufficient time to allow said active to act upon said surface.