Color stability of denture base acrylic resins in three food colorants.
BACKGROUND
Three commonly used artificial dyes in food technology are erythrosine, tartrazine, and sunset yellow.


OBJECTIVE
The color stability of 5 commercially available denture base acrylic resins (QC-20, Meliodent, Trevalon, Trevalon High, and Lucitone) was studied in vitro.


METHODS
The specimens were exposed to 3% erythrosine, tartrazine, and sunset yellow solutions at 23 degrees C +/- 1 degrees C. Color changes were determined with a computer-controlled spectrophotometer. Five specimens from each material were processed, and initial color measurements were made after 1, 3, and 6 months of exposure to the staining solutions. Finally, the color stability was quantitatively measured again, and color differences (DeltaE) were calculated.


RESULTS
For the observations made in 1, 3, and 6 months intervals, the specimens that exhibited the least color change were in the sunset yellow solution. The greatest color changes observed according to the National Bureau of Standards unit system were Lucitone (2.71) in erythrosine solution, Lucitone (2.54), QC-20 (1.71) in tartrazine solution, and QC-20 (1.66) in sunset yellow solution. The changes in the other acrylic resins in the 3 solutions were slight and at trace level.


CONCLUSIONS
All materials tested were acceptable from the standpoint of color stability for long-term exposure to these food colorants.
Hersek
N
N
Faculty of Dentistry, University of Hacettepe, Ankara, Turkey.
Canay
S
S
Uzun
G
G
Yildiz
F
F
D000180:Acrylic Resins / Q000737:chemistry*; D003116:Color; D003819:Denture Bases / Q000706:statistics & numerical data; D004347:Drug Interactions; D004355:Drug Stability; D005505:Food Coloring Agents / Q000494:pharmacology*; D008422:Materials Testing / Q000379:methods / Q000706:statistics & numerical data; D017797:Prosthesis Coloring / Q000706:statistics & numerical data; D018709:Statistics, Nonparametric; D013997:Time Factors
D000180:Acrylic Resins; D005505:Food Coloring Agents