Purpose: The purpose of this study was to examine changes in translucency and color of
particulate filler composite resins that can be fabricated into metal-free crowns. Materials
and Methods: Eight types of materials were used in this study. The particulate filler
composite resins were represented by Artglass, BelleGlass, Estenia, Gradia, and Targis.
Herculite XRV and Solidex were the conventional composite resins for crowns and fixed
partial denture facings, and Empress was the ceramic material. Disks with a thickness of
1.0 mm were fabricated from each material and subjected to an accelerated test by
immersion in 60°C distilled water for up to 8 weeks. Color measurements were made
before and after water immersion. Changes in translucency were evaluated by determining
the contrast ratio, and changes in color were evaluated by determining color difference.
Results: After water immersion, Targis and Solidex demonstrated a significant increase in
contrast ratio (6% to 7%) and a decrease in translucency. A color difference of more than
2.0, a visually perceptible value, was found for Targis, Gradia, and Solidex. However, the
maximum color difference for these was 3.0, a value that would be considered clinically
acceptable. Conclusion: Within the limitations of this study, the particulate filler composite
resins were stable in both translucency and color. Int J Prosthodont 2002;15:494–499.