A COMPOSITION FOR DELIVERY OF AN ORAL CARE SUBSTANCE TO A DENTAL SURFACE UPON APPLICATION OF THE COMPOSITION THERETO IS A FLEXIBLE FILM COMPRISING THE ORAL CARE SUBSTANCE DISPERSED IN A FILM-FORMING EFFECTIVE AMOUNT OF A POLYMERIC MATRIX HAVING A HYDROPHILIC COMPONENT, E.G.. VINYLPYRROLIDONE (VP), AND A HYDROPHOBIC COMPONENT, E.G.. VINYL ACETATE (VA), IN A WEIGHT RATIO SELECTED SUCH THAT THE FILM IS SUBSTANTIALLY DISSOLVABLE IN SALIVA IN A PERIOD OF TIME EFFECTIVE FOR DELIVERY OF THE ORAL CARE SUBSTANCE. THE POLYMERIC MATRIX ILLUSTRATIVELY COMPRISES A POLY(VP/VA) COPOLYMER HAVING A VP/VA WEIGHT RATIO OF ABOUT 90:10 TO ABOUT 10:90.
