Effect of different denture cleaning methods on roughness in resin denture base

To determine the effect of different denture cleaning methods on surface roughness in resin denture base. We established 20 wafer samples of fuser base resin (14 mm×14 mm×3 mm), and then randomly divided them into 4 groups: group A was the control group, which were placed in water, while group B, C and D were the experimental groups, whose cleaning methods were toothbrush and water, toothbrush and toothpaste, denture cleaning tablets, respectively. Each procedure in group B and C lasted for 3 seconds, but group D lasted 5 min and repeated for 1080 times. We cleaned twice a day to simulate the method of cleaning dentures. Surface roughness was checked after different procedures by laser scanning confocal microscopy. Significant difference on surface roughness was found between group B, C and A (P0.05). Significant surface roughness alterations have been observed in toothbrush and toothpaste group, but no change has been f