Abstract
Improvement of the physical properties of dental restorative resin was made with incorporation of crosslinked polymethacrylate derivatives as the filler of composites.However, these polymer fillers had poor solubility to monomer and unfavourable physical properties of resultant specimens.In this study, surface treatments were made on the praticles of crosslinked polymethacrylate and its effect on the Rockwell hardness, transverse strength and abrasion resistance was observed.Filler[Poly 2, 2-bis(4'-methacryloxy ethoxy phenyl)propane]and triethylene glycol dimethacrylate-bis MEPP(50:50mol%)were mixed together, poured into the metallic mold and heated to 130℃ for 15minutes, thus prepared the test specimens.Transverse strength of polymerized specimens were 769 kg/cm2 for non-treated, 1205 kg/cm2 for MACl-treated, 1144 kg/cm2 for γ-MPTS-treated and 1400 kg/cm2 for the specimens prepared from sulfuric aicd-MACl-treated polymer filler.On the other hand, with Rockwell hardness and abrasion resistance, little differences were observed between specimens prepared from surface treated and untreated polymer fillers.