Delivery system for a tooth whitener using a permanently deformable strip of material

• US 5,989,569 A
• Filed: 06/06/1997
• Issued: 11/23/1999
• Est. Priority Date: 06/06/1997
• Status: Expired due to Term

• Current Assignee: The Procter & Gamble Company
• Original Assignee: The Procter & Gamble Company
• Inventors: Dirksing, Robert S., Tweddell, Richard III, Sagel, Paul A.
• Primary Examiner(s): Rose, Shep K.
• Application Number:
  US08/870,665
• Time in Patent Office: 900 Days
• Field of Search: 424/49-58, 424/401, 424/435, 433/215, 433/228, 106/35
• 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

Abstract

A delivery system for an oral care substance includes a strip of material having a yield point and thickness such that the strip of material substantially conforms to a shape of a tooth via permanent deformation under a pressure less than about 250,000 Pascals when the delivery system is placed thereagainst. The delivery system also includes an oral care substance 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. The substance has an extrusion resistance sufficient to withstand a normal force applied to deform the strip of material so that the substance is not substantially extruded from between the strip of material and the surface during manual deformation of the strip of material. 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 unobtrusive so as to be wearable without interfering with normal social discourse and is of a size that individually fits an upper or lower row of a wearer'"'"'s teeth when placed against the teeth, comprising:

a. a strip of material of sufficient length to cover a plurality of adjacent teeth having a yield point and thickness such that said strip of material substantially conforms to the curvature of the wearer'"'"'s mouth, gaps between the adjacent teeth, a shape of a tooth via permanent deformation under a pressure less than about 250,000 Pascals when said delivery system is placed 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 having sufficient viscosity and tackiness for 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, said substance having an extrusion resistance sufficient to withstand a normal force applied to deform said strip of material so that said substance is not substantially extruded from between said strip of material and said surface during manual deformation of said strip of material.

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 is made of wax having a nominal film thickness of about 0.8 mm.

5. The delivery system of claim 1 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 1.5 mm.

6. 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 a conformable strip of material of sufficient length to cover a plurality of adjacent teeth having a yield point and thickness such that said strip of material substantially conforms to the curvature of the wearer'"'"'s mouth, gaps between the adjacent teeth, and a shape of a tooth via permanent deformation under a pressure less than about 250,000 Pascals; and

b. applying said conformable strip of material with said substance thereon to said surface such that said substance contacts said surface, said substance providing an active onto said surface, said substance also having sufficient viscosity and tackiness for 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, said substance having an extrusion resistance sufficient to withstand a normal force applied to deform said strip of material so that said substance is not substantially extruded from between said strip of material and said surface during manual deformation of said strip of material;

wherein said conformable strip of material is unobtrusive so as to be wearable without interfering with normal social discourse and is of a size that individually fits an upper or lower row of a wearer'"'"'s teeth when placed against the teeth.

7. The method of claim 6 wherein said substance is a gel.

8. The method of claim 6 wherein said strip of material is made of wax having a nominal film thickness of about 0.8 mm.

9. The method of claim 6 wherein said strip of material is substantially flat and rectangular in shape with rounded corners, and said strip of material including said substance coated thereon has an overall thickness less than about 1.5 mm.

10. 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 of sufficient length to cover a plurality of adject teeth having a yield point and thickness such that said strip of material substantially conforms to the curvature of the wearer'"'"'s mouth, gaps between the adjacent teeth and a shape of a tooth via permanent deformation under a pressure less than about 250,000 Pascals over said substance on said surface, said substance providing an active onto said surface, said substance also having sufficient viscosity and tackiness for 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, said substance having an extrusion resistance sufficient to withstand a normal force applied to deform said strip of material so that said substance is not substantially extruded from between said strip of material and said surface during manual deformation of said strip of material;

wherein said conformable strip of material is unobtrusive so as to be wearable without interfering with normal social discourse and is of a size that individually fits an upper or lower row of a wearer'"'"'s teeth when placed against the teeth.

11. The method of claim 10 wherein said substance is a gel.

12. The method of claim 10 wherein said strip of material is made of wax having a nominal film thickness of about 0.8 mm.

13. A delivery system for a tooth whitening substance of a size that individually fits an upper or lower row of a wearer'"'"'s teeth when placed against the teeth, comprising:

a. a strip of material of sufficient length to cover a plurality of adjacent teeth having a yield point and thickness such that said strip of material substantially conforms to a shape of the curvature of the wearer'"'"'s mouth, gaps between the adjacent teeth, and a tooth via permanent deformation under a pressure less than about 250,000 Pascals when said delivery system is placed thereagainst and said strip of material containing 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 having sufficient viscosity and tackiness for 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, said substance having an extrusion resistance sufficient to withstand a normal force applied to deform said strip of material so that said substance is not substantially extruded from between said strip of material and said surface during manual deformation of said strip of material.