稳定性和仪器仪表压力在新型孔隙融合/固定植入物的骨盆固定技术中:有限元研究
Matteo Panico1,2, Ruchi D Chande3, Derek P Lindsey3
1IRCCS Istituto Ortopedico Galeazzi, Milan, Italy.
International journal of spine surgery
|July 17, 2023
概括
多孔融合/固定植入物 (PFFI) 在脊椎形中增强了骨固定的稳定性. 这种技术减少了L5-S1和关节的运动,并降低了对植入物的压力.
科学领域:
- 脊柱外科手术 脊柱外科手术
- 生物机械工程 生物机械工程
- 整形外科的植入物.
背景情况:
- 脊柱骨固定对于脊柱形纠正的胸脊柱仪器仪表至关重要.
- 新型多孔融合/固定植入物 (PFFI) 提供了固定技术的潜在进步.
研究的目的:
- 描述PFFI在骨固定中的生物力学性能.
- 将PFFI的不同配置与传统方法进行比较.
主要方法:
- 创建了T10骨盆结构的有限元模型,使用不同的PFFI位置 (S2AI,PFFI-IFSAI,2-PFFI).
- 模型受到纯时刻负荷,模拟曲-延伸,横向曲和轴旋转.
- 结果与使用脚螺丝和S2AI螺丝的基线模型进行了比较.
主要成果:
- 在S2AI轨迹中的PFFI显示了与S2AI螺丝相似的L5-S1运动,而2-PFFI配置进一步减少了运动.
- 使用PFFI-IFSAI和2-PFFI配置,肌关节的运动减少了.
- PFFI降低了S1脚螺丝和S2AI植入物的最大应力.
结论:
- 用PFFI补充长脊柱结构可以增强L5-S1和关节的稳定性.
- PFFI减少了关键固定点的压力,可能降低伪缩和植入失败的风险.
相关概念视频
Stability of structures
196
In mechanical engineering, the stability of systems under various forces is critical for designing durable and efficient structures. One fundamental way to explore these concepts is by analyzing systems like two rods connected at a pivot point, O, with a torsional spring of spring constant k at the pivot point. This system is similar in appearance to a scissor jack used to change tires on a car. In this case, the arms of the linkage (equivalent to the rods in this system) are entirely vertical,...
196
Applications of Stress
370
Consider a structure made of a boom and a rod designed to support a load. These two components are connected by a pin and stabilized by brackets and pins. The boom and the rod are detached from their supports to assess the different stresses imposed on this structure, and a free-body diagram is drawn. Then, all the forces applied, including the load acting on the structure, are identified. The reaction forces exerted on both the boom and the rod are computed using the equilibrium equations.
The...
The...
370


