Objective. To evaluate staining resistance of the three restorative materials (Ketac Nano: KN, Filtek Supreme: FS, and Filtek Silorane: FLS) and the influences from surface finishes (600-grit SiC, Sof-Lex: SL, and BisCover LV: BC). Methods. Specimens (n= 8) were fabricated for each group. The staining resistance was tested by immersion of specimens in a coffee solution and distilled water as a control. Total color changes (DeltaE*ab) from baseline to 28 days were evaluated by computed CIE L* a* b* values. Surface topography was assessed by atomic force microscopy. Results. For KN and FS, 600-grit SiC had the highest DeltaE*ab followed by SL and BC respectively. For FLS, BC had the highest DeltaE*ab followed by 600-grit SiC and SL respectively. An increase of surface defects of BC was observed. Conclusions. Filtek Silorane polished with Sof-Lex provided the most color stability whereas BisCover LV improved color stability of Ketac Nano and Filtek Supreme.
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机译：目的。评估三种修复材料（Ketac Nano：KN，Filtek Supreme：FS和Filtek Silorane：FLS）的抗污性以及表面光洁度的影响（600粒度SiC，Sof-Lex：SL和BisCover LV：BC） 。方法。为每组制作标本（n = 8）。通过将样品浸入咖啡溶液和蒸馏水中作为对照来测试耐污染性。通过计算的CIE L * a * b *值评估从基线到28天的总颜色变化（DeltaE * ab）。表面形貌通过原子力显微镜评估。结果。对于KN和FS，600粒度SiC的DeltaE * ab最高，其次是SL和BC。对于FLS，BC具有最高的DeltaE * ab，其次是600粒度的SiC和SL。观察到BC的表面缺陷增加。结论。用Sof-Lex抛光的Filtek Silorane提供了最大的色彩稳定性，而BisCover LV改善了Ketac Nano和Filtek Supreme的色彩稳定性。
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