J Adv Prosthodont.  2020 Apr;12(2):55-60. 10.4047/jap.2020.12.2.55.

Effect of acidic beverages on surface roughness and color stability of artificial teeth and acrylic resin

• Bitencourt SB
• Catanoze IA
• Silva EVFd
• Santos PHd
• Santos DMd
• Turcio KHL
• Guiotti AM

• KMID: 2502328
• DOI: http://doi.org/10.4047/jap.2020.12.2.55

Abstract

PURPOSE
. 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 immersion process was divided into two stages: T1 - immersion in the acidic solutions for 10 minutes for 14 days; T2 - after T1, the samples were immersed in grape juice for 14 days. The Ra of the samples was evaluated in a rugosimeter and the ΔEab in a spectrophotometer, before and after the immersions. The analysis of variance of one (ΔEab) and two factors (Ra) and Tukey were performed (α=.05).
RESULTS
. There was a statistical difference for roughness after immersion (T1) for Trilux and Tritone teeth, regardless of the acid solution. For Trilux teeth, all acid solutions increased 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 change in the materials.

Keyword

Acrylic resins; Artificial teeth; Color; Physical properties; Surface analysis