Chakladar N D, Harper L T, Parsons A J
Composites Research Group, Faculty of Engineering, University of Nottingham, NG7 2RD, United Kingdom.
Composites Research Group, Faculty of Engineering, University of Nottingham, NG7 2RD, United Kingdom.
J Mech Behav Biomed Mater. 2016 Apr;57:334-46. doi: 10.1016/j.jmbbm.2016.01.029. Epub 2016 Feb 4.
Metallic bone plates are commonly used for arm bone fractures where conservative treatment (casts) cannot provide adequate support and compression at the fracture site. These plates, made of stainless steel or titanium alloys, tend to shield stress transfer at the fracture site and delay the bone healing rate. This study investigates the feasibility of adopting advanced composite materials to overcome stress shielding effects by optimising the geometry and mechanical properties of the plate to match more closely to the bone. An ulnar transverse fracture is characterised and finite element techniques are employed to investigate the feasibility of a composite-plated fractured bone construct over a stainless steel equivalent. Numerical models of intact and fractured bones are analysed and the mechanical behaviour is found to agree with experimental data. The mechanical properties are tailored to produce an optimised composite plate, offering a 25% reduction in length and a 70% reduction in mass. The optimised design may help to reduce stress shielding and increase bone healing rates.
金属骨板常用于手臂骨折，而保守治疗（石膏固定）无法在骨折部位提供足够的支撑和压缩力。这些由不锈钢或钛合金制成的骨板往往会屏蔽骨折部位的应力传递，并延缓骨愈合速度。本研究探讨了采用先进复合材料来克服应力屏蔽效应的可行性，方法是优化骨板的几何形状和力学性能，使其更接近骨骼。对尺骨横行骨折进行了表征，并采用有限元技术研究了复合骨板骨折结构相对于不锈钢等效结构的可行性。分析了完整和骨折骨骼的数值模型，发现力学行为与实验数据相符。调整力学性能以生产优化的复合骨板，其长度减少了25%，质量减少了70%。优化设计可能有助于减少应力屏蔽并提高骨愈合率。
