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Surface roughness and gloss of novel flowable composites after polishing and simulated brushing wear

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Author:
No author available
Journal Title:
Chinese Journal of Stomatology
Issue:
4
DOI:
10.3760/cma.j.issn.1002-0098.2017.04.010
Key Word:
复合树脂类;牙抛光;牙修复磨损;光泽度;Composite resins;Dental polishing;Dental restoration wear;Glossiness

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.

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