The degree of conversion (DC) and monomer leaching of three experimental urethane dimethacrylate (UEDMA)-hydroxypropyl methacrylate (HPMA)-based resin systems were studied.

Different analytical methods have been used to investigate the chemical composition of crown and bridge veneering materials. High-performance liquid chromatography with diode array detection system was used for identification and quantification of the monomers in the resin systems