ISSN:
1532-849X
Source:
Blackwell Publishing Journal Backfiles 1879-2005
Topics:
Medicine
Notes:
Purpose The color stability of two shades each of five acrylic resin and seven resin composite provisional restorative materials was evaluated by reflection spectrophotometry following in vitro accelerated aging.Materials and Methods Specimens of provisional restorative materials were polymerized according to manufacturers' instructions and aged in an artificial aging chamber with exposure to a total ultraviolet irradiation of 60 kj/m2. Color was measured by CIE L*a*b* on a reflection spectrophotometer before and after aging. Color change (ΔE*) was calculated and analyzed statistically.Results Statistically significant changes in color were observed after accelerated aging. Nine of the 12 provisional materials tested showed perceptible color change of at least one of the shades tested. The most color-stable materials were the acrylic, Alike, and the resin composites, Luxatemp and Protemp Garant, which had no perceptible color changes under these conditions.Conclusions Some acrylic resin and composite provisional materials change color significantly and perceptibly when exposed to in vitro accelerated aging conditions.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1111/j.1532-849X.1997.tb00088.x
