Properties of a silica-reinforced polymer for dental restorations

摘要: An esthetic and permanent restorative material that could be placed directly into the cavities prepared in anterior teeth would an important contribution to dental practice public well-being. Such a material, which have less solubility, sensitivity desiccation, brittleness than silicate cements,1,2 greater dimensional stability do methyl methacrylate direct filling resins,3’4 has been demand for many years. The present lack of mate­ rial complying with these requirements is problem worthy extensive investiga­ tion. tests reported here were under­ taken determine whether desired properties obtained re­ inforced organic polymer. In industry, plastics are commonly reinforced fibers, particles, or combination these. term “reinforcement” usually reserved instances where physi­ cal improved; “ filler” often implies no improvement physical chemical properties. Particles, rather selected use described iiere. Irregular shaped particles vitreous silica (General Electric Co.’s Clear Fused Quartz Powder), special surface treatment, used reinforce­ ment. Except otherwise specified, vinylsilane-coated fine enough pass through no. 100 sieve United States standard series, having dimensions ap­ proximately 150 microns (about 0.006 inch) smaller. binder this ment was specially study, because commercially available monomers comonomers did not pear as promising, respect polymerization shrinkage, comono­ mer system described. This especially designed low shrinkage.