Manteghi Saeed, Mahboob Zia, Fawaz Zouheir, Bougherara Habiba
Department of Mechanical and Industrial Engineering, Ryerson University, Toronto, ON, Canada M5B 2K3.
Department of Aerospace Engineering, Ryerson University, Toronto, ON, Canada M5B 2K3.
J Mech Behav Biomed Mater. 2017 Jan;65:306-316. doi: 10.1016/j.jmbbm.2016.08.035. Epub 2016 Sep 2.
The purpose of this study is to investigate the mechanical feasibility of a hybrid Glass/Flax/Epoxy composite material for bone fracture fixation such as fracture plates. These hybrid composite plates have a sandwich structure in which the outer layers are made of Glass/Epoxy and the core from Flax/Epoxy. This configuration resulted in a unique structure compared to prior composites proposed for similar clinical applications. In order to evaluate the mechanical properties of this hybrid composite, uniaxial tension, compression, three-point bending and Rockwell Hardness tests were conducted. In addition, water absorption tests were performed to investigate the rate of water absorption for the specimens. This study confirms that the proposed hybrid composite plates are significantly more flexible axially compared to conventional metallic plates. Furthermore, they have considerably higher ultimate strength in tension, compression and flexion. Such high strength will ensure good stability of bone-implant construct at the fracture site, immobilize adjacent bone fragments and carry clinical-type forces experienced during daily normal activities. Moreover, this sandwich structure with stronger and stiffer face sheets and more flexible core can result in a higher stiffness and strength in bending compared to tension and compression. These qualities make the proposed hybrid composite an ideal candidate for the design of an optimized fracture fixation system with much closer mechanical properties to human cortical bone.
本研究的目的是探究一种用于骨折固定（如接骨板）的玻璃/亚麻/环氧树脂混杂复合材料的力学可行性。这些混杂复合材料板具有三明治结构，其外层由玻璃/环氧树脂制成，芯层由亚麻/环氧树脂制成。与先前为类似临床应用提出的复合材料相比，这种结构产生了一种独特的结构。为了评估这种混杂复合材料的力学性能，进行了单轴拉伸、压缩、三点弯曲和洛氏硬度测试。此外，还进行了吸水性测试以研究试样的吸水速率。本研究证实，与传统金属板相比，所提出的混杂复合材料板在轴向具有明显更高的柔韧性。此外，它们在拉伸、压缩和弯曲方面具有相当高的极限强度。如此高的强度将确保骨折部位骨植入物结构的良好稳定性，固定相邻骨碎片，并承受日常正常活动中所经历的临床类型的力。此外，与拉伸和压缩相比，这种具有更强更硬面板和更柔韧芯层的三明治结构在弯曲时可产生更高的刚度和强度。这些特性使所提出的混杂复合材料成为设计一种优化骨折固定系统的理想候选材料，该系统的力学性能与人类皮质骨更为接近。
