Acrylic Denture Basis’ Long-Term Colour Stability

Objective: This study investigated how staining solutions affected the acrylic denture bases' colour stability. Materials and Methods: Fifty-six samples of acrylic denture base (hot and cold) were submerged in distilled water for control and three staining solutions. A spectrophotometer was utilized to measure colour Before immersion, every sample's initial colour value was noted. Following a 24-hour, one-week, and two-week immersion period, colour change values were calculated. Results: Hot coffee was the most preferred beverage, showing strong significance over both time periods (P = 0.002 for 24 hours, P = 0.013 for 1 week). This indicates a consistent preference for hot coffee. Karak and hibiscus demonstrated increasing preference over time, especially in their hot forms (P = 0.001 for hot Karak, P = 0.006 for hot hibiscus). This suggests that these drinks become more favored as habits develop. Comparison between 24-hour and 1-week data showed that coffee remained stable in preference, while Karak and hibiscus became more preferred over time. Conclusion: The denture base's discoloration rose in direct proportion to the immersion time, and the instant coffee solution was discovered to be the most chromogenic staining solution. To maintain the color stability of acrylic dentures, users should adopt good oral hygiene practices and minimize prolonged exposure to these beverages.