The aim was to evaluate the effect of four acidic beverages on the roughness (Ra) and color change(ΔEab) of two brands of artificial teeth and a heat-polymerized acrylic resin (HPAR) for use in a prosthetic base.MATERIALS AND METHODS. All materials were divided into 5 groups, according to the used acidic beverage(artificial saliva - control, red wine, orange juice, coke-based, and lemon juice-based soft drink). The immersionprocess was divided into two stages: T1 - immersion in the acidic solutions for 10 minutes for 14 days; T2 - afterT1, the samples were immersed in grape juice for 14 days. The Ra of the samples was evaluated in a rugosimeterand the ΔEab in a spectrophotometer, before and after the immersions. The analysis of variance of one (ΔEab) andtwo factors (Ra) and Tukey were performed (α=.05). RESULTS. There was a statistical difference for roughnessafter immersion (T1) for Trilux and Tritone teeth, regardless of the acid solution. For Trilux teeth, all acid solutionsincreased Ra (P.05). For Tritone teeth, only the coke-based soft drink did not statistically change Ra. Grape juice(T2) altered Ra only of artificial teeth (P.05). The color was changed for all materials, after T1 and T2.CONCLUSION. In general, the acidic solutions changed the Ra and ΔEab of HPAR and artificial teeth after T1.The grape juice altered the roughness only of the artificial teeth, promoting a clinically acceptable color changein the materials.
展开▼
