Mahjoory Mostafa, Shahgholi Mohamad, Karimipour Arash
Department of Mechanical Engineering, Najafabad Branch, Islamic Azad University, Najafabad, Iran.
Heliyon. 2023 Aug 2;9(8):e18835. doi: 10.1016/j.heliyon.2023.e18835. eCollection 2023 Aug.
In recent years, bone materials and cement innovation have made extraordinary strides. Calcium phosphate cement (CPC) regenerates body tissues and repairs bone and dental defects. Since the presence of nanoparticles (NPs) increased the initial cement strength in terms of the reduction of porosity, magnesium (Mg) NPs were used because of their unique properties. In this study, the effects of various Mg NP percentages and sizes on reinforced cement thermal behavior and mechanical behavior are investigated using the molecular dynamics (MD) simulation method. The changes of Young's modulus (YM), maximum temperature (MT), and ultimate strength (US) were investigated for this reason. The US, YM, and MT of the reinforced cement sample improved from 0.879 to 0.171 MPa to 1.326 and 0.255 MPa, respectively, and from 1321 to 1403 K by raising the NPs percentage to 4%. The radius increase of NPs to 16 Å enhanced the US, YM, and MT to 0.899 MPa, 0.179 MPa, and 1349 K. The MT decreased to 1275 K. The quantity and size of the Mg NPs significantly enhanced the mechanical behavior of the finished cement, according to the findings.
近年来，骨材料和骨水泥创新取得了非凡进展。磷酸钙骨水泥（CPC）可使身体组织再生，修复骨和牙齿缺损。由于纳米颗粒（NPs）的存在通过降低孔隙率提高了初始骨水泥强度，镁（Mg）纳米颗粒因其独特性能而被使用。在本研究中，采用分子动力学（MD）模拟方法研究了不同Mg纳米颗粒百分比和尺寸对增强骨水泥热行为和力学行为的影响。为此研究了杨氏模量（YM）、最高温度（MT）和极限强度（US）的变化。通过将纳米颗粒百分比提高到4%，增强骨水泥样品的极限强度、杨氏模量和最高温度分别从0.879和0.171兆帕提高到1.326和0.255兆帕，从1321开尔文提高到1403开尔文。将纳米颗粒半径增加到16埃可将极限强度、杨氏模量和最高温度提高到0.899兆帕、0.179兆帕和1349开尔文。最高温度降至1275开尔文。研究结果表明，Mg纳米颗粒的数量和尺寸显著增强了成品骨水泥的力学行为。
