Delivery system for a tooth whitener using a strip of material having low flexural stiffness
US5879691A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jun 6, 1997 |
| Grant date | Mar 9, 1999 |
| Priority date | — |
| Expiry date | Jun 6, 2017 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61C19/066
- WIPO fieldPharmaceuticals
- WIPO sectorChemistry
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.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.