Abstract
Feldspar porcelains are ceramic materials that allow full or partial dental ceramic restorations similar to natural teeth, combining aesthetics (color, shape and texture) to mechanical strength. The ceramic restorations are made of a ceramic support (alumina, zirconia, spinel or glass-ceramics) on which layers of porcelains with pigments are applied and fired to provide color, translucency and fluorescence. In the present work, the ceramic support was a densely sintered alumina plate for an easier colorimetric evaluation using CIELab method. A previous manufacture of finely milled frits for each different batch of porcelain was essential, in order to obtain a nice layering by firing at relatively low temperatures (900 to 980 °C). Among four different formulations (pigments and frits) for porcelain layers using Brazilian raw materials, the so named B1 and B2 were those which presented shades and textures near to dentine-3 reference.
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