A major problem in restorative dentistry is the lack of adhesion o f dental materials to tooth structure. Bowen (1965a) synthesized a surface-active como nomer, the reaction product of N-plienylglycine andglycidylmethacrylate, to serve as a coupling agent between dental restorative materials and tooth struc ture. A new composite restorative material, l)e Trey Cosmic, which incorporates Cosmic...