Color Stability of Acrylic Resin Teeth After Immersion in Staining Solutions

Abstract

The objective of this study was to evaluate the color alteration of four brands of artificial teeth (Art Plus, Trilux, Bionote and Biolux), after immersion in color solutions of coffee, red wine and urucum. We used 80 artificial teeth, which were standardized with 2 mm thickness. Then, they were subjected to finishing and polishing, and divided into 4 groups (n = 05), which were immersed in one of the 3 types of dye, plus distilled water (control). The samples were immersed daily for 4 hours, then they were removed, washed in tap water, dried with absorbent paper and immersed in distilled water for the subsequent hours in a biological glasshouse at 37 ºC, for 21 days. The evaluation of the color change was made in the periods of 0, 7, 14 and 21 days, by means of the tristimulus colorimeter. The data were subjected to the ANOVA and Tukey test with a 5 % significance. The results showed that the urucum was the substance that caused the greatest staining while the coffee and the wine did not show statistical difference. Regarding trademarks, Trilux presented a statistical difference compared to the other commercial brands, revealing colorimetric alteration only in the 14-day period. It was concluded that the composition of the artificial teeth, the type of pigmenting agent and the immersion time determine the color change.

Color stability of nanohybrid and microhybrid composites after immersion in common coloring beverages at different times: a laboratory study

“…In the case of Yemeni coffee immersion, the observed mean color change (ΔE) values (yellowish) were between 6.4 and 11.4. This result is in accordance with those of Maranhão et al [ 31 ] and Raja et al [ 17 ]. Coffee contains components called tannins, which are a type of polyphenol that breaks down in the water.…”

“…This result is in agreement with those of Nuaimi and Ragab [ 25 ], Özdaş et al [ 16 ] and Choi et al [ 30 ] on the color stability of composite resin restorative materials, which have suggested that the color stability of these resins is unpredictable over a long period of time and affected by the composite type and storage time, with most of the resins showing unacceptable color changes over time. Maranhão et al [ 31 ] suggested that the composition of the composite restoration, type of pigmenting solution, and immersion time determine the color change.…”