An oral and dental care and cleaning agent, containing, based on the weight thereof, a) from 0.1 to 5 wt.% copolymer(s), comprising at least one structural unit of formula and/or at least one structural unit of formula with the proviso that said agent contains, based on the weight thereof, from 0.15 to 4 wt.%, preferably from 0.2 to 3 wt.%, particularly preferably from 0.25 to 2.75 wt.%, extremely preferably from 0.5 to 2.5 wt.%, and in particular from 1 to 2 wt.% copolymer(s) from the group of copolymers each composed exclusively of the following monomers: - ammonium acrylate and acrylic acid; - ammonium acrylate and methacrylic acid; - ammonium acrylate and acrylic acid ethyl ester; - ammonium acrylate and methacrylic acid ethyl ester; - ammonium methacrylate and acrylic acid; - ammonium methacrylate and methacrylic acid; - ammonium methacrylate and acrylic acid ethyl ester; - ammonium methacrylate and methacrylic acid ethyl ester; - ammonium acrylate and ammonium methacrylate and acrylic acid; - ammonium acrylate and ammonium methacrylate and methacrylic acid; - ammonium acrylate and ammonium methacrylate and acrylic acid ethyl ester; - ammonium acrylate and ammonium methacrylate and methacrylic acid ethyl ester; - ammonium acrylate and acrylic acid and methacrylic acid; - ammonium acrylate and acrylic acid and acrylic acid ethyl ester; - ammonium acrylate and acrylic acid and methacrylic acid ethyl ester; - ammonium acrylate and methacrylic acid and acrylic acid ethyl ester; - ammonium acrylate and methacrylic acid and methacrylic acid ethyl ester; - ammonium acrylate and acrylic acid ethyl ester and methacrylic acid ethyl ester; - ammonium methacrylate and acrylic acid and methacrylic acid; - ammonium methacrylate and acrylic acid and acrylic acid ethyl ester; - ammonium methacrylate and acrylic acid and methacrylic acid ethyl ester; - ammonium methacrylate and methacrylic acid and acrylic acid ethyl ester; - ammonium methacrylate and methacrylic acid and methacrylic acid ethyl ester; - ammonium methacrylate and acrylic acid ethyl ester and methacrylic acid ethyl ester; - ammonium acrylate and ammonium methacrylate and acrylic acid and methacrylic acid; - ammonium acrylate and ammonium methacrylate and acrylic acid and acrylic acid ethyl ester; - ammonium acrylate and ammonium methacrylate and acrylic acid and methacrylic acid ethyl ester; - methacrylic acid methyl ester; - ammonium acrylate and ammonium methacrylate and methacrylic acid and acrylic acid ethyl ester; - ammonium acrylate and ammonium methacrylate and methacrylic acid and - methacrylic acid ethyl ester; - ammonium acrylate and ammonium methacrylate and acrylic acid ethyl ester and methacrylic acid ethyl ester. a) from 0.1 to 5 wt.% copolymer(s), comprising at least one structural unit of formula and/or at least one structural unit of formula - ammonium acrylate and acrylic acid; - ammonium acrylate and methacrylic acid; - ammonium acrylate and acrylic acid ethyl ester; - ammonium acrylate and methacrylic acid ethyl ester; - ammonium methacrylate and acrylic acid; - ammonium methacrylate and methacrylic acid; - ammonium methacrylate and acrylic acid ethyl ester; - ammonium methacrylate and methacrylic acid ethyl ester; - ammonium acrylate and ammonium methacrylate and acrylic acid; - ammonium acrylate and ammonium methacrylate and methacrylic acid; - ammonium acrylate and ammonium methacrylate and acrylic acid ethyl ester; - ammonium acrylate and ammonium methacrylate and methacrylic acid ethyl ester; - ammonium acrylate and acrylic acid and methacrylic acid; - ammonium acrylate and acrylic acid and acrylic acid ethyl ester; - ammonium acrylate and acrylic acid and methacrylic acid ethyl ester; - ammonium acrylate and methacrylic acid and acrylic acid ethyl ester; - ammonium acrylate and methacrylic acid and methacrylic acid ethyl ester; - ammonium acrylate and acrylic acid ethyl ester and methacrylic acid ethyl ester; - ammonium methacrylate and acrylic acid and methacrylic acid; - ammonium methacrylate and acrylic acid and acrylic acid ethyl ester; - ammonium methacrylate and acrylic acid and methacrylic acid ethyl ester; - ammonium methacrylate and methacrylic acid and acrylic acid ethyl ester; - ammonium methacrylate and methacrylic acid and methacrylic acid ethyl ester; - ammonium methacrylate and acrylic acid ethyl ester and methacrylic acid ethyl ester; - ammonium acrylate and ammonium methacrylate and acrylic acid and methacrylic acid; - ammonium acrylate and ammonium methacrylate and acrylic acid and acrylic acid ethyl ester; - ammonium acrylate and ammonium methacrylate and acrylic acid and methacrylic acid ethyl ester; - methacrylic acid methyl ester; - ammonium acrylate and ammonium methacrylate and methacrylic acid and acrylic acid ethyl ester; - ammonium acrylate and ammonium methacrylate and methacrylic acid and - methacrylic acid ethyl ester; - ammonium acrylate and ammonium methacrylate and acrylic acid ethyl ester and methacrylic acid ethyl ester.