Department of Dental and Biomedical Materials Science, Graduate School of Biomedical Sciences, Nagasaki University.
Department of Dental Biomaterials, Research Center for Science and Technology in Medicine, School of Dentistry, Tehran University of Medical Sciences.
J Oral Sci. 2021 Mar 31;63(2):148-151. doi: 10.2334/josnusd.20-0436. Epub 2021 Jan 28.
The objective of this study was to evaluate the physical and mechanical properties of a short fiber-reinforced resin composite: everX-Posterior and compare it with two bulk-fill composites, namely, Filtek Bulk-fill and Beautifil-Bulk, which are intended for large posterior restorations.
Investigated properties were flexural strength, flexural modulus, surface roughness, volumetric shrinkage and depth of cure. Scanning electron microscopy images of each specimen after the flexural test were used for cross-sectional comparison. Results were analyzed using ANOVA following Tukey post-hoc test.
Flexural strength of everX-Posterior was comparable with two other resin composites, showing higher flexural modulus. EverX-Posterior showed the highest surface roughness after polishing and the lowest volumetric shrinkage (2.29%) among all composites used in this study. Data also showed that the everX-Posterior depth of cure was 4.24 mm, which was the highest among the three groups.
Based on the results of this study, it was concluded that everX-Posterior as a short fiber-reinforced composite showed improvements and satisfactory performance in mechanical and physical properties, which make it a reliable base material candidate for large posterior restorations.
本研究旨在评估一种短纤维增强树脂复合材料——everX-Posterior 的物理和机械性能，并将其与两种适用于大体积后牙修复的通用型树脂复合材料（Filtek Bulk-fill 和 Beautifil-Bulk）进行比较。
研究的性能包括弯曲强度、弯曲模量、表面粗糙度、体积收缩率和固化深度。对弯曲试验后的每个样本进行扫描电子显微镜图像分析，以进行横截面比较。采用方差分析（ANOVA）和 Tukey 事后检验对结果进行分析。
everX-Posterior 的弯曲强度与其他两种树脂复合材料相当，但弯曲模量较高。everX-Posterior 经抛光后的表面粗糙度最高，在本研究中使用的所有复合材料中，体积收缩率最低（2.29%）。数据还显示，everX-Posterior 的固化深度为 4.24mm，在三组中最高。
根据本研究结果，可以得出结论，everX-Posterior 作为一种短纤维增强型复合材料，在机械和物理性能方面表现出了改进和令人满意的性能，使其成为大体积后牙修复的可靠基础材料候选者。
