Color change of soft silicone relining materials after storage in artificial saliva

Abstract

Statement of problem: The interaction between artificial saliva and color change of silicone soft liners has not been clarified.

Purpose: The purpose of this in vitro study was to investigate the effect of artificial saliva storage on the color stability of soft silicone liners.

Material and methods: Four silicone-based liners (Elite Soft Relining, GC Reline Soft, Megabase, and Mucopren Soft) (n=10) were tested after 7, 30, and 90 days of storage in artificial saliva at 37°C in darkness. The color of each specimen was measured with a spectrophotometer using the CIELab color scale. Statistical analysis was performed with the nonparametric ANOVA for dependent variables and nonparametric ANOVA for independent variables (α=.05).

Results: The storage in artificial saliva significantly affected the color integrity of 3 of the 4 tested materials. For GC Reline Soft material, the time of storage had no significant effect on color.

Conclusions: Significant differences were found in the color changes of silicone-based denture liners after storage in artificial saliva. With regard to color stability, GC Reline Soft may be recommended for use in dental practices as a silicone soft relining material for long-term applications.