Bacali Cecilia, Badea Mindra, Moldovan Marioara, Sarosi Codruta, Nastase Vivi, Baldea Ioana, Chiorean Radu Stefan, Constantiniuc Mariana
Department of Prosthodontics and Dental Materials, Iuliu Hatieganu University of Medicine and Pharmacy, 32 Clinicilor, 400006 Cluj-Napoca, Romania.
Department of Preventive Dental Medicine, Iuliu Hatieganu University of Medicine and Pharmacy, 31 Avram Iancu, 400083 Cluj-Napoca, Romania.
Materials (Basel). 2019 Jul 23;12(14):2335. doi: 10.3390/ma12142335.
The clinical performances of dental materials depend on their mechanical profiles, determining their long-term deformation and wear resistance. This paper describes a study on the mechanical properties, water absorption and morphological properties of a polymethyl methacrylate (PMMA) resin enriched with graphene-silver nanoparticles (Gr-Ag). Two different concentrations-1 and 2 wt.%-of Gr-Ag were loaded into the PMMA material. For the mechanical characterization, the compression behavior, flexural strength and tensile strength were evaluated. Optical microscopy in polarized light and scanning electron microscopy were used for filler analysis. The filler addition led to an improvement in all mechanical properties, with slight changes being derived from the filler content variation. Gr-Ag use led to an increase in the applied maximum loads. Moreover, 1 wt.% Gr-Ag determined an increase of 174% in the modulus of rupture, which indicates high flexibility.
牙科材料的临床性能取决于其机械性能，这些性能决定了它们的长期变形和耐磨性。本文描述了一项关于富含石墨烯 - 银纳米颗粒（Gr-Ag）的聚甲基丙烯酸甲酯（PMMA）树脂的机械性能、吸水性和形态学性能的研究。将两种不同浓度（1重量％和2重量％）的Gr-Ag添加到PMMA材料中。为了进行机械表征，评估了压缩行为、弯曲强度和拉伸强度。使用偏光光学显微镜和扫描电子显微镜进行填料分析。添加填料使所有机械性能都有所改善，填料含量的变化产生了轻微影响。使用Gr-Ag导致施加的最大载荷增加。此外，1重量％的Gr-Ag使断裂模量增加了174％，这表明具有高柔韧性。
