US 9,254,255 B2; Chung-Yuan Christian University has been awarded a patent for a dental care product with two-part formulations. They are a first agent comprising an orally acceptable carrier and equal to or more than 0.1mg/ml of a block copolymer containing an negatively charged anchoring block and a zwitterionic block; and second agent comprising an orally acceptable carrier and equal to or more than 0.1mg/ml of another block copolymer containing a positively charged anchoring block and a zwit...