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 dispersedin 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。一種當塗覆組成物於牙表面上時供遞送口部護理物質之組成物為一種可撓性薄膜，其包含口部護理物質，被分散於成膜有效量之聚合性基質中，該基質具有經選擇重量比之親水性成分(例如乙烯吡咯啶酮(VP))，及疏水性成分(例如乙酸乙烯酯(VA))，使薄膜在一段有效遞送口部護理物質之期間內實質上可溶解於唾液中。聚合性基質例示性地包含一種聚(VP/VA)共聚物，具有VP/VA重量比約90：10至約10：90。
