Comparative Evaluation of the Effect of Brushing Simulation on the Surface Roughness of Acrylic- and Silicone-Based Soft Liners Using Two Different Commercially Available Denture Cleansers: An In Vitro Study

Objective This present in vitro study evaluates the impact of brushing simulation on the surface roughness of acrylic-based and silicone-based soft denture liners following immersion in two different denture cleansing solutions. Materials and methods Specimens of silicone-based and acrylic-based soft liners were fabricated and subjected to a standardized brushing simulation protocol. Soft liners were suspended into the standard template of 40 mm x 15 mm x 10 mm dimensions. Two denture cleansers were employed during simulated brushing. The first group was brushed with Stim Clanden denture cleanser, and the second group with Clinsodent denture cleaning powder. Surface roughness (Ra and Rz values) was recorded before and after the simulation using a profilometer. Data were statistically evaluated using Mann-Whitney U and Kruskal-Wallis tests to determine significant differences. Results A statistically marked increase in surface roughness was noted in both liner types after brushing simulation. Silicone-based liners exhibited comparatively better resistance to surface deterioration than acrylic-based liners. Conclusion Brushing simulation with denture cleansers impacts the surface roughness of soft liners, with acrylic-based liners being more susceptible to surface damage. Silicon-based soft liners proved to be effective and more resistant to surface damage.