Comparison of Colour Stability Between Various Denture Base Resins on Staining and Denture Cleansing Using Commercially Available Denture Cleansers.

Statement of problem Discoloration of denture base materials on routine usage has been one of the common esthetic problems encountered by patients. Aim To determine the color stability of three different denture base materials upon staining with beverages and denture cleansing using commercially available denture cleansers. Materials and method Three denture base materials were used for the study, processed according to the manufacturer's recommendation, and cut into 40 study samples measuring approximately 1 cm x 1 cm with 1 mm thickness. The samples were divided into two groups, Group A and Group B, and spectrophotometric analysis of all samples was done to evaluate the base value of the color for comparative analysis. Group A was immersed in coffee and Group B was immersed in cola and color change was noted after 12 hours and then after 24 hours. The samples were then cleansed using a denture cleanser and analyzed again. All values were tabulated and statistically analyzed. Result On descriptive statistical analysis, polymethylmethacrylate (PMMA) had higher ∆E values at 12 hrs after immersion in coffee and cola; after 24 hrs, high impact PMMA had higher ∆E values in coffee and PMMA in cola. Two-way analysis of variance (ANOVA) analysis showed no statistically significant difference for the samples immersed in coffee, whereas samples immersed in cola at the end of 24 hrs showed a significant statistical difference. Conclusion Thermoplastic resin was the least staining denture base material when compared to conventional PMMA and high-impact PMMA when immersed in coffee and cola. There was no significant difference in the cleanability of all three-denture base materials.