Tuyển tập các báo cáo nghiên cứu khoa học trên tạp chí khoa học vật lý quốc tế đề tài: Effect of Filler Incorporation on the Fracture Toughness Properties of Denture Base Poly(Methyl Methacrylate) | Journal of Physical Science Vol. 20 2 1-12 2009 1 Effect of Filler Incorporation on the Fracture Toughness Properties of Denture Base Poly Methyl Methacrylate N. W. Elshereksi1 S. H. Mohamed1 A. Arifin2 and Z. A. Mohd Ishak2 1Higher Institute of Medical Technology 1458 Misurata -Libya 2School of Materials and Mineral Resources Engineering Engineering Campus Universiti Sains Malaysia 14300 Nibong Tebal Pulau Pinang Malaysia Corresponding author nidalwanis@ Abstract Poly methyl methacrylate PMMA is the material of choice for denture base construction. In spite of its many good qualities the application of PMMA as an ideal dental base material is still restricted by a few limitations. One of these is the difficulty in achieving intrinsic radiopacity in the material. The aim of the present study is to investigate the possibility of using barium titanate BaTiO3 as a radiopacifier in PMMA. The formulation used in this study composed of PMMA wt BaTiO3 10 wt and benzoyl peroxide BPO wt as an initiator methyl methacrylate MMA 90 wt as a monomer and ethylene glycol dimethyl acrylate EGDMA 10 wt as a cross-linking agent. The BaTiO3 was treated by a silane coupling agent 3-trimethoxysilylpropyl methacrylate y-MPS prior to incorporation in the solid components PMMA BPO . The curing was carried out using a water bath at 78 C for h. The samples were tested for fracture toughness before and after soaking for 28 days in simulated body fluid SBF . Moreover the morphology of the specimens was investigated by scanning electron microscope SEM . The results showed that the neat PMMA possessed slightly higher fracture toughness properties than the PMMA composite and after 28 days of immersion the fracture toughness values were reduced by and for neat PMMA and PMMA composite respectively. Keywords poly methyl methacrylate barium titanate fracture toughness simulated body fluid denture base materials Abstrak Poli metakrilat PMMA ialah bahan asas yang .
