Department of Restorative Dentistry, Dental Materials Division, University of Campinas, Piracicaba Dental School, Piracicaba, SP, Brazil.
Department of Restorative Dentistry, Operative Dentistry Division, University of Campinas, Piracicaba Dental School, Piracicaba, SP, Brazil.
Microsc Res Tech. 2019 Oct;82(10):1756-1767. doi: 10.1002/jemt.23342. Epub 2019 Jul 16.
The purpose of this study was to evaluate the surface roughness (Ra), and the morphology and composition of filler particles of different composites submitted to toothbrushing and water storage. Disc-shaped specimens (15 mm × 2 mm) were made from five composites: two conventional (Z100™, and Filtek™ Supreme Ultra Universal, 3M), one "quick-cure" (Estelite ∑ Quick, Tokuyama), one fluoride-releasing (Beautiful II, Shofu), and one self-adhering (Vertise Flow, Kerr) composite. Samples were finished/polished using aluminum oxide discs (Sof-Lex, 3M), and their surfaces were analyzed by profilometry (n = 5) and scanning electron microscopy (SEM; n = 3) at 1 week and after 30,000 toothbrushing cycles and 6-month water storage. Ra data were analyzed by two-way analysis of variance and Tukey's test (α = 0.05). Filler particles morphology and composition were analyzed by SEM and X-ray dispersive energy spectroscopy, respectively. Finishing/polishing resulted in similar Ra for all the composites, while toothbrushing and water storage increased the Ra of all the tested materials, also changing their surface morphology. Beautifil II and Vertise Flow presented the highest Ra after toothbrushing and water storage. Filler particles were mainly composed of silicon, zirconium, aluminum, barium, and ytterbium. Size and morphology of fillers, and composition of the tested composites influenced their Ra when samples were submitted to toothbrushing and water storage.
本研究旨在评估不同复合材料经牙刷刷洗和水储存后的表面粗糙度（Ra）、填料颗粒的形貌和组成。从五种复合材料中制作出圆盘形试件（15mm×2mm）：两种常规复合材料（Z100™和 Filtek™ Supreme Ultra Universal，3M）、一种“快速固化”复合材料（Estelite ∑ Quick，Tokuyama）、一种释放氟化物复合材料（Beautiful II，Shofu）和一种自粘结复合材料（Vertise Flow，Kerr）。使用氧化铝圆盘（Sof-Lex，3M）对样品进行修整/抛光，然后通过轮廓仪（n = 5）和扫描电子显微镜（SEM；n = 3）在 1 周、30000 次牙刷刷洗循环和 6 个月水储存后分析其表面。Ra 数据采用双向方差分析和 Tukey 检验（α = 0.05）进行分析。填料颗粒的形貌和组成分别通过 SEM 和 X 射线能谱分析进行分析。修整/抛光使所有复合材料的 Ra 相似，而牙刷刷洗和水储存增加了所有测试材料的 Ra，并改变了它们的表面形貌。在牙刷刷洗和水储存后，Beautifil II 和 Vertise Flow 的 Ra 值最高。填料颗粒主要由硅、锆、铝、钡和镱组成。在对样本进行牙刷刷洗和水储存时，填料的大小、形态以及测试复合材料的组成会影响其 Ra 值。
