Chair of Solid Mechanics, University of Siegen, Paul-Bonatz-Str. 9-11, 57068 Siegen, Germany.
J Mech Behav Biomed Mater. 2019 May;93:151-157. doi: 10.1016/j.jmbbm.2019.02.009. Epub 2019 Feb 12.
Mechanical engineering and its scientific principles constitute an essential core in medical science. Currently, different composite resins are widely used as restorative dental materials. However, their lack of adequate strength and toughness has led to research that is aimed at improving the mechanical properties of dental composites. In the present study, the behavior of three different dental materials is investigated under static and dynamic loading conditions. In the experimental tests, a split Hopkinson pressure bar is utilized which corresponds to the most commonly used experimental setup for examining material behavior under a high rate of loading. The examined dental composites experience impacts during their service life and also during car accidents or sport injuries. Hence, in the study, impact loading is modeled in an experiment. A series of compression tests is conducted from low to high strain rates up to 40s, and the dynamic elastic moduli of three different dental composites are measured. Furthermore, studies on the compressed surface of the dental composite specimens are performed to improve the analysis with respect to the hardness of the materials. The responses of the examined composites to dynamic loadings verify the impact resistance of the materials. The results indicate the load-carrying capabilities of the dental composites. These results can be used for materials development and existing computational models.
机械工程及其科学原理构成了医学科学的重要核心。目前，不同的复合材料被广泛用作修复牙科材料。然而，它们缺乏足够的强度和韧性，导致了旨在提高牙科复合材料机械性能的研究。在本研究中，在静态和动态加载条件下研究了三种不同牙科材料的行为。在实验测试中，使用了分裂霍普金森压杆，这对应于最常用于研究高速加载下材料行为的实验设置。在使用寿命期间以及在汽车事故或运动损伤期间，检查的牙科复合材料会经历冲击。因此，在研究中，在实验中模拟了冲击加载。从低到高应变率进行了一系列压缩试验，直至 40s，并测量了三种不同牙科复合材料的动态弹性模量。此外，还对牙科复合材料试件的压缩表面进行了研究，以提高对材料硬度的分析。检查复合材料对动态加载的响应验证了材料的抗冲击性。结果表明了牙科复合材料的承载能力。这些结果可用于材料开发和现有的计算模型。
