Department of Conservative Dentistry and Endodontics, Pomeranian Medical University, Szczecin 70-111, Poland.
Department of Manufacturing Technology, West Pomeranian University of Technology, Szczecin 70-313, Poland.
Biomed Res Int. 2020 Aug 12;2020:6203053. doi: 10.1155/2020/6203053. eCollection 2020.
The aim of the study was to determine the quantitative and qualitative surface structure of contemporary RBCs in posterior teeth reconstructions: regular viscosity bulk fill and conventional composites, obtained after two-stage polishing procedure.
Four conventional nanohybrid composites (Tetric EvoCeram, GrandioSO, Filtek Z550, and Ceram·X Mono) and four regular viscosity bulk fill composites (Tetric EvoCeram Bulk Fill, X-tra fil, Filtek Bulk Fill Posterior, and QuixFil) were tested. Samples of each RBC were prepared using PMMA cylindrical mold. After two-step polishing procedure, a surface geometry was evaluated under profilometry (Turbowave v. 7.36, Hommel-Etamic) and SEM (VEGA 3, Tescan Analytics). To evaluate differences between values, the following nonparametric tests were used: Friedman's ANOVA, Wilcoxon's matched-pair test, ANOVA Kruskal-Wallis, and Mann-Whitney .
All conventional RBCs showed Ra values in the range of 0.20-0.26 m. Bulk fill showed higher values in range of 0.49-1.36 m except for Filtek Bulk Fill Posterior, which achieved 0.23 m Ra value. SEM images of conventional RBCs were described as smooth surfaces with slight damage except for TEC, which presented smooth surface with no damage. Bulk fill composites showed rough surface, except for TBF, which presented smooth surface with slight damage.
Regular viscosity bulk fill composites do not constitute a homogeneous group regarding surface roughness after polishing. They obtain, for the most part, poorer smoothness values after polishing than conventional RBCs.
本研究旨在确定后牙修复中经两步抛光后当代 RBC 的定量和定性表面结构：常规粘度块状填充和传统复合材料。
测试了四种传统纳米复合树脂（Tetric EvoCeram、GrandioSO、Filtek Z550 和 Ceram·X Mono）和四种常规粘度块状填充复合材料（Tetric EvoCeram Bulk Fill、X-tra fil、Filtek Bulk Fill Posterior 和 QuixFil）。使用 PMMA 圆柱形模具制备每种 RBC 的样品。经过两步抛光程序后，使用轮廓仪（Turbowave v. 7.36，Hommel-Etamic）和 SEM（VEGA 3，Tescan Analytics）评估表面几何形状。为了评估值之间的差异，使用了以下非参数检验：Friedman 的 ANOVA、Wilcoxon 的配对检验、ANOVA Kruskal-Wallis 和 Mann-Whitney。
所有传统 RBC 的 Ra 值均在 0.20-0.26 μm 范围内。除 Filtek Bulk Fill Posterior 外，块状填充均显示出 0.49-1.36 μm 的较高 Ra 值范围，后者达到 0.23 μm Ra 值。传统 RBC 的 SEM 图像被描述为表面光滑，只有轻微损伤，除了 TEC，它呈现出无损伤的光滑表面。块状填充复合材料的表面粗糙，除了 TBF，它呈现出轻微损伤的光滑表面。
常规粘度块状填充复合材料在抛光后在表面粗糙度方面并非一个均匀的组。与传统 RBC 相比，它们在抛光后大多获得较差的光滑度值。
