The Effect of Denture Cleansers on the Surface Roughness of Heat-Polymerized Denture Base Resins Polished by Three Different Techniques.

The article investigates the combined effects of different polishing protocols and denture cleansers on the surface roughness of three commercially available heat-polymerized polymethyl methacrylate (PMMA) denture base resins. Using an in vitro design, specimens were polished by laboratory, chairside, or carbide bur techniques and subjected to simulated daily immersion in two denture cleansers or distilled water over 365 days. Results showed that surface roughness was significantly influenced by the type of acrylic resin and polishing method, with carbide bur treatment producing the roughest surfaces, while immersion in denture cleansers did not significantly affect roughness values. The study concludes that the tested denture cleansers can be safely used for denture hygiene without altering surface roughness, but polishing method critically impacts surface smoothness relevant to plaque accumulation.