Surface roughness and gloss of novel flowable composites after polishing and simulated brushing wear / 中华口腔医学杂志

ABSTRACT

Objective@#To investigate surface properties of novel flowable composites after polishing and simulated brushing wear, compared to their pasty counterpart.@*Methods@#Composites employed in this study were three flowable composites (A1 Clearfil Majesty ES Flow; B1 Beautifil Flow Plus F00; C1 Filtek Bulk Fill) and three paste composites (A2 Clearfil Majesty; B2 Beautifil; C2 Filtek Z350. Eleven disk-shaped specimens were made for each material. The specimens were cured, then subjected to sandpaper finishing for 20 s, one-step polishing for 30 s, finally subjected to simulated brushing for 10 000 cycles. Surface roughness and glossiness were measured before finishing, after finishing, after polishing, after 5 000 brushing cycles and after 10 000 brushing cycles, respectively. Data obtained were analyzed using two-way ANOVA method. Scanning electron microscope was employed to examine the microscopic appearance of each material.@*Results@#Surface roughness (0.11~0.22 μm) and glossiness (74.25~86.48 GU) of each material were similar after one-step polishing. After brushing simulation, roughness increased significantly and glossiness decreased significantly for each material (P<0.05). Group A1 presented the best gloss ([50.68±1.58] GU) after final wear (P<0.05). Flowable composites of group A1 and B1 tested in the present setup showed better surface properties compared to their pasty counterpart (group A2 and B2).@*Conclusions@#Within the limit of this study, flowable composites tested in the present research can obtain similar surface polish or even better than the paste composite counterpart.