Effects of Gigantochloa apus String Bamboo Fiber Brushes on Heat-Cured Acrylic Resin Plate Surface Roughness.

Purpose: The objective of this study was to assess the impact of string bamboo fiber brushes (Gigantochloa apus) on the surface roughness of heat-cured acrylic resin plates. Materials and Methods: This study used a pretest and posttest laboratory experiment with a control group design, with data obtained from the average surface roughness values of heat-cured acrylic resin plates after brushing using bamboo silk fiber brushes as the test group and conventional denture brushes as the control group. Results: The Shapiro-Wilk test showed that the data were normally distributed, with a total of 32 samples of heat-cured acrylic resin plates (p=0.794). The results of this study found that the average surface roughness values of the anatomical surface of heat-cured acrylic resin plates after being brushed with string bamboo fiber brushes were 0.20 µm and 0.18 µm for the nonanatomical surface. The difference in the average surface roughness of the heat-cured acrylic resin plates, both on anatomical and nonanatomical surfaces, before and after brushing with string bamboo fiber brushes, was 0.0001 (p  < 0.05). Conclusion: Bamboo denture toothbrushes exhibit a lower abrasive effect than nylon denture toothbrushes, with the abrasiveness remaining below the threshold requirements established for dental materials.