An aqueous oral care fluoride treatment composition, a method of providing fluoride to a patient's tooth surface, and a method of reducing the incidence of dental caries, wherein the composition includes: 0.5 wt-% to 4.8 wt-% of a water-soluble cationic N-containing polymer； a pharmaceutically acceptable buffer； 1.0 wt-% to 2.5 wt- % of sodium fluoride； and at least 60 wt-% water； wherein the weight percentages are based on the total weight of the aqueous composition.
