Electromagnetic radiation and multi-phase oral compositions for oral care
A kit includes a multi-phase oral composition for whitening teeth and a delivery carrier. The multi-phase oral composition for whitening teeth includes from about 0.002% to about 30%, by weight of the multi-phase oral composition, of a discontinuous aqueous phase having up to 10%, by weight of the multi-phase oral composition, of a bleaching agent and a continuous hydrophobic phase having at least about 50%, by weight of the multi-phase oral composition, of petrolatum.
1. A kit comprising:
a) a multi-phase oral composition for whitening teeth, the multi-phase oral composition comprising:
i) from about 0.002% to about 30%, by weight of the multi-phase oral composition, of a discontinuous aqueous phase comprising up to 10%, by weight of the multi-phase oral composition, of a bleaching agent; and
ii) a continuous hydrophobic phase comprising at least about 50%, by weight of the multi-phase oral composition, of petrolatum,
wherein the multi-phase oral composition is a water-in-oil emulsion; and
b) a delivery carrier.
2. The kit of claim 1 , wherein the delivery carrier is a dental tray.
3. The kit of claim 1 , wherein the delivery carrier is a strip, wherein the strip is deformable and made of plastic or wax.
4. The kit of claim 1 , wherein the delivery carrier is a brush tip applicator.
5. The kit of claim 1 , wherein a ratio of a concentration in weight percent of bleaching agent present in the aqueous phase to a concentration in weight percent of bleaching agent present in the multi-phase oral composition is at least about 10.
6. The kit of claim 5 , wherein the ratio is at least about 50.
7. The kit of claim 1 , wherein an amount of the bleaching agent ranges from about 0.01% to about 0.03%, by weight of the multi-phase oral composition.
8. The kit of claim 1 , wherein an amount of the bleaching agent ranges from about 0.1% to about 5%, by weight of the multi-phase oral composition.
9. The kit of claim 1 , wherein a two-dimensional density of droplets with a cross-sectional area larger than about 10000 square microns is no more than about 20 per square centimeter.
10. The kit of claim 9 , wherein the two-dimensional density of droplets with a cross-sectional area larger than about 10000 square microns is no more than about 10 per square centimeter.
11. The kit of claim 1 , wherein the bleaching agent is a peroxide bleaching agent, and wherein a standard deviation of a peroxide concentration of the multi-phase oral composition smeared onto peroxide test strips is no more than about 50.
12. The kit of claim 1 , wherein the bleaching agent is a peroxide bleaching agent, and wherein a mean residual peroxide concentration of the multi-phase oral composition smeared onto peroxide test strips is from about 1 to about 100.
13. The kit of claim 1 , wherein the bleaching agent in the multi-phase oral composition comprises hydrogen peroxide.
14. The kit of claim 1 , wherein a bleaching efficacy of the multi-phase oral composition calculated as −Δb* is at least about 1.5.
15. The kit of claim 1 , wherein a ratio of a bleaching efficacy of the multi-phase oral composition calculated as −Δb* to a weight percentage of the bleaching agent present in the multi-phase oral composition is at least about 1.5.
16. The kit of claim 1 , wherein the discontinuous aqueous phase is dispersed as droplets within the continuous hydrophobic phase.
17. The kit of claim 1 , wherein the multi-phase oral composition comprises from greater than 0% to about 0.5%, by weight of the multi-phase oral composition, of emulsifier.
18. A method of using the kit of claim 1 , the method comprising:
applying the multi-phase oral composition to one or more teeth using the delivery carrier;
maintaining the multi-phase oral composition on the one or more teeth for a first period of time without directing radiation toward the one or more teeth; and
activating an electromagnetic radiation source after the first period of time to direct electromagnetic radiation toward the one or more teeth for a second period of time, wherein the electromagnetic radiation source is capable of directing electromagnetic radiation with one or more wavelength in a range from about 200 nm to about 1700 nm toward at least one tooth, wherein the electromagnetic radiation source emits the electromagnetic radiation in a range from about 75 mW/cm 2 to about 250 mW/cm 2 .
19. The method of claim 18 , further comprising removing the multi-phase oral composition from the one or more teeth after activating the electromagnetic radiation source.
20. The method of claim 18 , further comprising removing the multi-phase oral composition from the one or more teeth before activating the electromagnetic radiation source.