Experimental Investigation for Some Properties of PMMA Denture Base Strengthened by Different Nanoadditives
Experimental Investigation for Some Properties of PMMA Denture Base Strengthened by Different Nanoadditives
复制标题
不同纳米添加剂强化PMMA义齿基托某些性能的实验研究
DOI：
10.24996/ijs.2020.61.11.15
复制
发表时间：
2020
影响因子：
--
通讯作者：
H. Mansoor
中科院分区：
文献类型：
--
作者：
Z. Alraziqi;H. Mansoor
聚甲基丙烯酸甲酯（PMMA）因其优异的生物相容性和易于制备而被广泛应用于牙科和医疗领域。然而，这种化合物的一些物理和机械特性被认为是较差的。报道了在实验室温度下制备了7组PMMA纳米复合材料样品。这些样品可用于制作全颌或部分义齿基托。本研究的目的是制备以PMMA为基体材料，以两种不同类型的粉末（制备的SnO2纳米颗粒和天然蛋壳粉（ESP））为增强材料的纳米复合材料。所选择的添加剂在许多情况下作为纯复合材料或混合复合材料使用，特别是重量百分比比为1和2 wt%。采用原子力显微镜（AFM）、红外光谱（FTIR）、x射线衍射（XRD）和扫描电镜（SEM）对制备的纳米颗粒进行了表征。此外，还应用了几种测试来评估增强前后的力学行为，包括导热系数、维氏显微硬度和吸水率。结果表明：在添加SnO2NPs的情况下，复合材料的最大吸能量为1%，导热系数随SnO2NPs含量的增加而显著增加。随着添加剂含量的增加，表面显微硬度有明显的提高趋势。纯复合材料的显微硬度测量值最高，分别为19.59VHS和13.30VHS。吸水试验结果表明，纯复合材料中ESP和SnO2的含量越高，吸水能力越强，扩散系数(D)值越高。
In dental and medical applications, poly-methyl methacrylate (PMMA) has been widely accepted due to the excellent biocompatibility and easy fabrication. Yet, some of the physical and mechanical characteristics of this compound are considered inferior. Seven groups of PMMA nano-composite samples were reported to be fabricated at laboratory temperature . These samples could be used in manufacturing the complete or partial maxillary denture base. The aim of this research is to prepare nanocomposite materials which consist of PMMA as a matrix material and two different types of powder (prepared nanoparticles of SnO2 and natural egg shell powder (ESP)) as strengthening materials. The selected additives were used in many cases as pure or hybrid composites, specifically with weight percentage ratios of 1 and 2 wt%. Several analytical tests, namely AFM, FTIR, XRD and SEM, were used on the prepared nanoparticles. In addition, several tests were applied to assess the mechanical behavior before and after the reinforcement, including thermal conductivity, Vickers micro-Hardness, and water absorption. The results showed that the maximum amount of energy absorption in the composites was 1% at different types of additives, while a significant increase in thermal conductivity was recorded as the SnO2NPs percentage was increased. For surface micro-hardness, an obvious trend of increase was observed with the increase in additive percentage. The highest measured values of micro-hardness (19.59VHS and 13.30VHS) were recorded for the pure composites of 2% ESP and 2% SnO2, respectively. The results of water absorption test showed that higher percentages of ESP and SnO2, separately, within the pure composite resulted in higher water absorption capacity and an increased value of diffusion coefficient (D).