Delivery system for a tooth whitener
View Patent ↗A delivery system for delivering a tooth whitening substance to a surface of an oral cavity, comprising a film of flexible malleable polymer material having a tooth whitening substance as an integral component of said film, thus providing an active on said oral surface when said film is adhered to the oral surface, said film having a dissolution rate in the aqueous medium of the oral cavity such that the tooth whitening substance can release its active upon said oral surface to act effectively thereon within a predetermined period of time, said film being disintegrable thereafter after effecting its tooth whitening action.
1. A delivery system for delivering a tooth whitening substance to a surface of an oral cavity, comprising a film of a flexible malleable polymer material having a tooth whitening substance dispersed within said film, thus providing an active on said oral surface when said film is adhered to the oral surface, said film having a dissolution rate in the aqueous medium of the oral cavity such that the tooth whitening substance can release its active upon said oral surface to act effectively thereon within a predetermined period of time, wherein said film disintergrates about one hour after being placed in the oral cavity.
2. A delivery system according to claim 1 wherein said active is H 2 O 2 complexed with a PVP polymer, and said PVP polymer is uncrosslinked or crosslinked PVP, PVP-VA, alkylated PVP or PVP-AA.
3. A delivery system according to claim 1 wherein said film is made of uncrosslinked PVP-H 2 O 2 optionally with hydroxypropyl methyl cellulose, ethyl cellulose and/or glycerol.
4. A delivery system according to claim 1 wherein the film contains glycerol as plasticizer.