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In vitro study reveals unpolished dental materials exhibit reduced color stability independent of luminescence changes, indicating the necessity of evaluating both optical traits separately.
Unpolished specimens with a more developed surface have lower color stability. Specimens stored in water develop some changes in their visual appearance. The presently proposed methods are effective in evaluating the luminescence of dental materials. Luminescence needs to be tested in addition to color, as the two characteristics are uncorrelated. It is important to further improve the color and luminescence stability of dental materials.
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Gawriołek et al. (2012) studied this question.
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