The use of N-phenylglycine in a dental adhesive system

—A dentin and enamel bonding procedure was described earlier that used an acidic solution (aqueous ferric oxalate), a surface-active co-monomer (NTG-GMA, the reaction product of N(p-tolyl)glycine and glycidyl methacrylate), and a dimethacrylate (PMDM, the reaction product of hydroxyethyl methacrylate and pyromellitic dianhydride). The present paper reveals the discovery that a much more simple and available compound, N-phenylglycine, can be substituted for NTG-GMA without a sacrifice in bond strength.