Aim: Both conventional and flexible resins may show color alteration due to intrinsic and extrinsic factors. The aim of this study was to evaluate the color changes of the polyamid and heat polymerized acrylic denture base materials in storage of different staining solutions. Methods: Two denture base materials were used in this study. The speciemens were stored in two staining solutions (tea, ...

The aim of this study was to evaluate color inconstancy dental ceramics under the white light-emitting diode illuminants recently proposed by CIE. From spectral reflectance factors 18 (VST, NSP, and IEC; shades A1, A2, A3, A3.5, B2, C2), corresponding colors illuminant D65 CIE 1931 Standard Colorimetric Observer were computed for all samples, using chromatic adaptation transform CIECAT16. CIEDE...

In everyday language, we can call someone ‘consistent’ to say that they’re reliable, that they don’t change over time. Someone who’s consistently on time is always on time. Similarly, we can call someone ‘inconsistent’ to say the opposite: that they’re changeable, mercurial. A student who receives inconsistent grades on her tests throughout a semester has performed better on some than on others...

ISOHE (1) HAS DESCRIBED a color reaction produced by the addition of alcoholic carbazole to uronic acids previously heated in 87% sulfuric acid. The purpose of the present report is to apply a modification of this method to the determination of hyaluronic acid in synovial fluid. The concentration of mucin in synovial fluid has been determined by the turbidity of the mucin clot (2) or by the che...