牙科树脂复合材料(DRC)通常用于修复受龋齿或缺损影响的牙齿。这些材料必须具有优异的性能以承受复杂的口腔环境。本研究的目的是制备和表征氮化硼纳米片(BNN)/甲基丙烯酸二甲基氨基十六酯(DMAHDM)复合材料(BNN/DMA),并评价它们作为功能性填料,以增强牙科树脂的机械和抗菌性能。在分子动力学(MD)理论指导下成功制备了BNN/DMA复合材料,然后采用各种测试方法对BNN/DMA复合材料进行了理化和形貌表征,如FT-IR,XRD,紫外-可见光谱,SEM,TEM,AFM。按一定比例掺入牙科流动性树脂中,结果表明,弯曲强度(FS),弹性模量(EM),抗压强度(CS),改性树脂复合材料的显微硬度(MH)分别提高了53.29、47.8、97.59和37.1%,分别,加入0.8wt%的BNN/DMA复合填料。对变形链球菌有很好的抑制作用,抑制率高达90.43%。此外,即使在老化一个月后,这种效果仍然存在。总之,用低浓度BNN/DMA复合材料对可流动树脂的改性有利地整合了牙科树脂的机械性能和长期抗菌活性。同时,它们具有良好的生物相容性,不影响美观。BNN/DMA复合改性可流动树脂具有成为新型抗菌牙科修复材料的潜力。
Dental resin composites (DRCs) are commonly used to restore teeth affected by dental caries or defects. These materials must possess excellent properties to withstand the complex oral environment. The objective of this study was to prepare and characterize Boron nitride nanosheets (BNN)/ dimethyl amino hexadecyl methacrylate (DMAHDM) composites (BNN/DMA), and to evaluate them as functional fillers to enhance the mechanical and antimicrobial properties of dental resins. The BNN/DMA composites were successfully prepared under the theoretical guidance of molecular dynamics (MD), and then the physicochemical and morphological characterization of the BNN/DMA composites were carried out by using various test methods, such as FT-IR, XRD, UV-vis spectroscopy, SEM, TEM, and AFM. It was doped into the dental flowable resin in a certain proportion, and the results showed that the flexural strength (FS), elastic modulus (EM), compressive strength (CS), and microhardness (MH) of the modified resin composites were increased by 53.29, 47.8, 97.59, and 37.1%, respectively, with the addition of 0.8 wt % of BNN/DMA composite fillers. It has a good inhibition effect on Streptococcus mutans, with an inhibition rate as high as 90.43%. Furthermore, this effect persists even after one month of aging. In conclusion, the modification of flowable resins with low-concentration BNN/DMA composites favorably integrates the mechanical properties and long-term antimicrobial activity of dental resins. At the same time, they have good biocompatibility and do not affect the aesthetics. The BNN/DMA composite modified flowable resin has the potential to become a new type of antimicrobial dental restorative material.