Oral care compositions

1. A high water oral care composition comprising:

an orally acceptable carrier;

zinc phosphate;

a first stannous ion source; and

a second stannous ion source,

wherein the first stannous ion source is stannous fluoride and the second stannous ion source is stannous chloride, wherein the amount of zinc phosphate is present in an amount of from 0.05 to 10% by weight, relative to the weight of the oral care composition, wherein the amount of the first stannous ion source is from 0.01% to 5% by weight, relative to the weight of the oral care composition, wherein the amount of the second stannous ion source is from 0.01% to 5% by weight, relative to the weight of the oral care composition, and wherein the amount of the water is 10% by weight or more, relative to the weight of the oral care composition.

2. A composition according to claim 1 , wherein the zinc phosphate is a preformed salt of zinc phosphate.

3. A composition according to claim 1 , wherein the amount of zinc phosphate is present in an amount of from 0.5 to 5% by weight, relative to the weight of the oral care composition.

4. A composition according to claim 1 , wherein the amount of the first stannous ion source is from 0.3% to 1% by weight, relative to the weight of the oral care composition.

5. A composition according to claim 1 , wherein the amount of the second stannous ion source is from 0.3% to 1% by weight, relative to the weight of the oral care composition.

6. A composition according to claim 1 , wherein the amount of the water is from 10% to 60% by weight, relative to the weight of the oral care composition.

7. A composition according to claim 1 , further comprising one or more humectants selected from sorbitol, glycerol, xylitol and propylene glycol, or combinations thereof.

8. A composition according to claim 1 , further comprising one or more surfactants selected from sodium lauryl sulfate, sodium laureth sulfate, or cocamidopropyl betaine, or combinations thereof.

9. A composition according to claim 1 , further comprising an effective amount of one or more alkali phosphate salts.

10. A composition according to claim 9 , wherein the alkali phosphate salts comprise tetrasodium pyrophosphate or tetrapotassium pyrophosphate in an amount of 0.5 to 5% by weight of the composition.

11. A composition according to claim 1 , further comprising one or more sources of zinc ions in addition to the zinc phosphate.

12. A composition according to claim 1 , further comprising an organic acid buffer system comprising a carboxylic acid and one or more conjugate base salts thereof.

13. A composition according to claim 1 , wherein the oral care composition is a dentifrice.

14. A method of treatment or prevention of erosive tooth demineralization, gingivitis, plaque, and/or dental caries, the method comprising the application to the oral cavity of a person in need thereof a composition according to claim 1 .

15. A method to(i) reduce or inhibit formation of dental caries, (ii) reduce, repair or inhibit pre-carious lesions of the enamel, (iii) reduce or inhibit demineralization and promote remineralization of the teeth, (iv) reduce hypersensitivity of the teeth, (v) reduce or inhibit gingivitis, (vi) promote healing of sores or cuts in the mouth, (vii) reduce levels of acid producing bacteria, (viii) to increase relative levels of arginolytic bacteria, (ix) inhibit microbial biofilm formation in the oral cavity, (x) raise and/or maintain plaque pH at levels of at least pH 5.5 following sugar challenge, (xi) reduce plaque accumulation, (xii) treat, relieve or reduce dry mouth, (xiii) clean the teeth and oral cavity (xiv) reduce erosion, (xv) prevents stains and/or whiten teeth, (xvi) immunize the teeth against cariogenic bacteria; and/or (xvii) promote systemic health, including cardiovascular health, the method comprising applying an effective amount of the oral composition according to claim 1 to a surface of an oral cavity in need thereof.