Effect of Denture Cleansers on the Color Changes of Thermoplastic Denture Base Material

Abstract

Background: The aim of this study was to investigate the effects of three denture cleaners (sodium hypochlorite, professional, and dentipur) on the possible color changes of thermoplastic denture base materials. Materials and Methods: A total of 88 thermoplastic resins samples were randomly divided into four groups (n = 22) for computer-assisted analysis of photographs within the L? a? b? color space system. The high-resolution digital images of the samples were taken using a digital camera under standardized conditions and saved in RAW format; then the images were imported into Adobe Photoshop CS4 for shade analysis. Mean and standard deviations were calculated for all cleansers. One-way ANOVA with Tukey's HSD post-hoc analyses was performed to compare all the chromatic ordinates L?, a? and b? of the study groups. P < 0.05 was considered statistically significant. Results: One-way ANOVA showed that the type of denture cleanser influenced the color changes and the differences among the study groups were statistically significant (P < 0.001). Conclusions: All three cleansers showed observable color changes up to very much level and thus were unacceptable for cleaning thermoplastic materials.