Mohajon Dipa Rani, Prodan Doina, Moldovan Marioara, Petean Ioan, Cuc Stanca, Filip Miuta, Carpa Rahela, Gheorghe Georgiana Florentina, Saroşi Codruţa Liana
Faculty of Chemistry and Chemical Engineering, Babeș-Bolyai University, 11 Arany János Str., 400028 Cluj-Napoca, Romania.
Raluca Ripan Institute for Research in Chemistry, Babeș-Bolyai University, 30 Fantanele Str., 400294 Cluj-Napoca, Romania.
Materials (Basel). 2024 Jun 3;17(11):2711. doi: 10.3390/ma17112711.
Short glass fibers are generally used in posterior dental restorations to enhance the mechanical properties and improve the material microstructure. Two resin-based composites (S0 and SF) were formulated and characterized to investigate the influence of zirconium in their characteristics and properties. The organic part of the investigated materials was the same (BisGMA, TEGDMA, and a photochemical polymerization system), and in the inorganic part, besides quart, glassA, and hydroxylapatite with Zn, sample S0 contained strontium glass with zirconium and sample SF contained fiber powder of chopped zirconium. The samples were characterized by the degree of conversion (DC), mechanical properties, water sorption (WS), scanning electron microscopy (SEM), atomic force microscopy (AFM) before and after the WS test, and antimicrobial properties. The results obtained were subjected to one-way ANOVA and Tukey's statistical tests. Both samples had a high DC. Regarding the mechanical properties, both samples were very similar, except DTS, which was higher for the composite without fibers. After 14 days, the WS value of the SF sample was lower than that of the S0 sample. Water caused significant changes in the topography of the SF sample, but thanks to its antimicrobial properties and the diffusion phenomenon, SF had a more pronounced antimicrobial effect. This study shows that the addition of appropriate amounts of Sr-Zr-glass powder gives the material in which it is added similar properties to material containing chopped zirconium glass fiber powder. According to the antimicrobial test results, resin composites containing experimental zirconia fillings can be considered in future in vitro clinical studies for posterior reconstructions with significantly improved mechanical properties.
短玻璃纤维通常用于后牙修复，以增强机械性能并改善材料微观结构。制备并表征了两种树脂基复合材料（S0和SF），以研究锆对其特性和性能的影响。所研究材料的有机部分相同（双酚A双甲基丙烯酸缩水甘油酯、三乙二醇二甲基丙烯酸酯和光化学聚合体系），在无机部分，除了石英、玻璃A和含锌羟基磷灰石外，样品S0含有含锆锶玻璃，样品SF含有切碎的锆纤维粉末。通过转化率（DC）、机械性能、吸水率（WS）、扫描电子显微镜（SEM）、WS测试前后的原子力显微镜（AFM）以及抗菌性能对样品进行表征。对所得结果进行单因素方差分析和Tukey统计检验。两个样品都有较高的DC。关于机械性能，除了双轴拉伸强度（DTS）外，两个样品非常相似，不含纤维的复合材料的DTS更高。14天后，SF样品的WS值低于S0样品。水导致SF样品的形貌发生显著变化，但由于其抗菌性能和扩散现象，SF具有更明显的抗菌效果。本研究表明，添加适量的Sr-Zr玻璃粉会使添加该玻璃粉的材料具有与含切碎锆玻璃纤维粉的材料相似的性能。根据抗菌测试结果，含实验性氧化锆填充物的树脂复合材料未来可考虑用于体外临床研究，以进行机械性能显著改善的后牙修复。
