Surface roughness difference of bis-acryl provisional crown material under different toothbrush filament and toothpaste abrasive degree

Introduction: Brushing of provisional crown material using a toothbrush and abrasive toothpaste induced surface roughness. This study aim to determine differences in surface roughness on bis-acryl provisional crown material brushed under soft and medium filament toothbrushes with a combination of high and low abrasive toothpaste. Methods: This laboratory experimental study used 40 samples in 4 groups consisted of 10 samples for each group. Samples brushing method was carried out using a Modified V8-Brushing Machine tool for 2000 cycles at a speed of 120 cycles/minutes and a 0.2 N pressure. Results: Surface roughness measurements were measured using a profilometer. Kruskal-Wallis Statistical analysis test was used to determine significant differences between test groups. This study indicate that there is a difference in surface roughness on bis-acryl provisional crown material brushed with soft and medium filament toothbrushes with a combination of high and low abrasive toothpaste p = 0.01 (p < 0.05). Conclusion: Brushing with a medium filament toothbrush resulted in  higher roughness value than brushing with a soft filament toothbrush and the group brushed with high abrasive toothpaste showed higher roughness values than brushing with low abrasive toothpaste.