Mechanical properties of polymer-infiltrated-ceramic (sodium aluminum silicate) composites for dental restoration

Journal of Dentistry
Ben-Cang CuiCe-Wen Nan

Abstract

To fabricate indirect restorative composites for CAD/CAM applications and evaluate the mechanical properties. Polymer-infiltrated-ceramic composites were prepared through infiltrating polymer into partially sintered sodium aluminum silicate ceramic blocks and curing. The corresponding samples were fabricated according to standard ISO-4049 using for mechanical properties measurement. The flexural strength and fracture toughness were measured using a mechanical property testing machine. The Vickers hardness and elastic modulus were calculated from the results of nano-indentation. The microstructures were investigated using secondary electron detector. The density of the porous ceramic blocks was obtained through TG-DTA. The conversion degrees were calculated from the results of mid-infrared spectroscopy. The obtained polymer infiltrated composites have a maximum flexural strength value of 214±6.5MPa, Vickers hardness of 1.76-2.30GPa, elastic modulus of 22.63-27.31GPa, fracture toughness of 1.76-2.35MPam1/2 and brittleness index of 0.75-1.32μm-1/2. These results were compared with those of commercial CAD/CAM blocks. Our results suggest that these materials with good mechanical properties are comparable to two commercial CAD/CAM bl...Continue Reading

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Aug 31, 2018·Dental Materials Journal·Junichi ShinagawaJunji Tagami
Nov 9, 2019·Journal of Prosthodontics : Official Journal of the American College of Prosthodontists·Iben J R Lucsanszky, N Dorin Ruse
May 13, 2021·Journal of Dental Research·M K SodeyamaH Shimizu

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