Oral Care Compositions

Abstract

An oral care composition comprising zinc phosphate, stannous fluoride and an organic acid buffer system, as well as methods of using the same.

1 - 20 . (canceled) 
     
     
         21 . An oral care composition comprising: a zinc source in an amount from about 0.5 to about 4 wt. %, relative to the weight of the oral care compositions, stannous fluoride in an amount from about 0.01 to about 5 wt. %, relative to the weight of the oral care composition, and an organic acid buffer system,
 wherein the organic acid buffer system comprises citric acid and sodium citrate in an amount of about 1 to about 3 wt. %, relative to the weight of the oral care composition, measured as the combined amount of citric acid and sodium citrate; and   wherein the composition comprises water in an amount from about 10 to about 50 wt. %, relative to the weight of the oral care composition.   
     
     
         22 . A composition according to  claim 21 , wherein the zinc phosphate is a preformed salt of zinc phosphate. 
     
     
         23 . A composition according to  claim 21 , wherein the buffer system comprises citric acid and a sodium citrate salt, in a ratio of from 1:3 to 1:6. 
     
     
         24 . A composition according to  claim 21 , further comprising one or more humectants. 
     
     
         25 . A composition according to  claim 21 , further comprising one or more surfactants. 
     
     
         26 . A composition according to  claim 21 , further comprising an effective amount of one or more alkali phosphate salts. 
     
     
         27 . A composition according to  claim 26 , wherein the alkali phosphate salts comprise tetrasodium pyrophosphate, tetrapotassium pyrophosphate, or a combination thereof. 
     
     
         28 . A composition according to  claim 26 , wherein the alkali phosphate salts comprise sodium tripolyphosphate, potassium tripolyphosphate, or a combination thereof. 
     
     
         29 . A composition according to  claim 21 , wherein the zinc source is selected from zinc phosphate, zinc citrate, zinc oxide, zinc lactate, zinc pyrophosphate, zinc sulfate, zinc chloride, and a combination thereof. 
     
     
         30 . A composition according to  claim 29 , wherein the source comprises zinc phosphate, zinc citrate, zinc oxide, zinc lactate, or a combination thereof. 
     
     
         31 . A composition according to  claim 29 , wherein the source comprises zinc phosphate. 
     
     
         32 . A composition according to  claim 31 , wherein the oral care composition is a dentifrice, powder, cream, strip or gum. 
     
     
         33 . 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 . 
     
     
         34 . An oral care composition comprising: a zinc source in an amount from about 0.5 to about 4 wt. %, relative to the weight of the oral care compositions, stannous fluoride in an amount from about 0.01 to about 5 wt. %, relative to the weight of the oral care composition, and an organic acid buffer system,
 wherein the organic acid buffer system comprises citric acid and sodium citrate in a weight ratio of citric acid to sodium citrate of 1:3 to 1:6,   wherein the composition comprises water in an amount from about 10 wt. % or more, relative to the weight of the oral care composition.   
     
     
         35 . A composition according to  claim 34  further comprising one or more alkali phosphate salts. 
     
     
         36 . A composition according to  claim 35 , wherein the alkali phosphate salts comprise sodium tripolyphosphate, potassium tripolyphosphate, tetras odium pyrophosphate, tetrapotassium pyrophosphate, or a combination thereof. 
     
     
         37 . A composition according to  claim 34  further comprising a surfactant. 
     
     
         38 . A composition according to  claim 34  further comprising a humectant selected from sorbitol, glycerol, xylitol, propylene glycol, and a combination thereof. 
     
     
         39 . An oral care composition comprising: a zinc source in an amount from about 0.5 to about 4 wt. %, relative to the weight of the oral care compositions; stannous fluoride in an amount from about 0.01 to about 5 wt. %, relative to the weight of the oral care composition; an organic acid buffer system; and at least one of tetrasodium pyrophosphate or tetrapotassium,
 wherein the composition comprises water in an amount from about 10 wt. % or more, relative to the weight of the oral care composition.