preparation and characterization of p2o5 containing canasite glass-ceramics as potential materials for dental restorations

Various analysis techniques were used to investigate the effects of p2o5 on the crystallization, mechanical features, and chemical resistance of canasite-based glass-ceramics. the results showed that canasite-type crystals were the primary crystalline phase in the examined glass-ceramics subjected to the two-step heat treatment, while fluorapatite was the secondary crystalline phase in some specimens. the microstructural observations by field emission electron microscope indicated that the randomly oriented interlocked blade-like canasite crystals decreased with an increase in the p2o5 content of the parent glasses. among the examined glass-ceramics, the base-p2 composition (containing 2 weight ratios of p2o5 in the glass) showed the most promising mechanical features (flexural strength of 176 mpa and fracture toughness of 2.9 mpa.m1/2) and chemical resistance (solubility of 2568 µg/cm2). this glass-ceramic could be further considered as a core material for dental restorations.