Microstructure and Homogeneity of Dental Porcelain Frits

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The microstructure and homogeneity of three commercial dentin and incisal unfired porcelain frits (one conventional and two ultra-low fusing types) fused-to metal were analyzed by X-ray diffractometry, scanning electron microspectroscopy, and wavelength- and energy-dispersive X-ray microspectroscopy. The average contents of tetragonal and cubic leucite for the conventional and one of the ultra-low fusing type frits were 20.1-22.6 wt% and 0-2.6 wt%, respectively, whereas those of another of the ultra-low fusing type frits were about 11.5-11.6 wt% and 2.9-4.6 wt%, respectively. The conventional type frits seemed to be admixtures three kinds of glass frits. One of the ultra-low fusing type frits seemed to be an admixture of four kinds glass frits. Another ultra-low fusing frits seemed to be only one kind of glass frit dispersed with small size, less than 1 μm, leucite crystals. There were no remarkable differences in microstructure and homogeneity between dentin and incisal porcelain frits in each brand.
日本歯科理工学会の論文