Palka Marek, Miszczyk Patrycja, Jurewicz Maciej, Perz Rafal
Institute of Aeronautics and Applied Mechanics, Warsaw University of Technology, Nowowiejska 24, 00-660, Warsaw, Poland.
Faculty of Medicine, Medical University of Warsaw, Żwirki i Wigury 61, 02-091, Warsaw, Poland.
Heliyon. 2024 Feb 24;10(8):e26840. doi: 10.1016/j.heliyon.2024.e26840. eCollection 2024 Apr 30.
This study investigates the optimal placement of locking plate screws for bone fracture stabilization in the humerus, a crucial factor for enhancing healing outcomes and patient comfort. Utilizing Finite Element Method (FEM) modeling, the research aimed to determine the most effective screw configuration for achieving optimal stress distribution in the humerus bone. A computer tomography (CT) scan of the humerus was performed, and the resulting images were used to create a detailed model in SOLIDWORKS 2012. This model was then analyzed using ANSYS Workbench V13 to develop a finite element model of the bone. Four different screw configurations were examined: 4 × 0°, 4 × 10°, 4 × 20°, 2 × 20°; 2 × 0°. These configurations were subjected to bending in the XZ and YZ planes, as well as tension and compression along the Z axis. The research identified the 2 × 20°+2 × 0° configuration as the most beneficial, with average stress values below 30 MPa and peak stress values below 50 MPa in 3-point bending at the first screw. This configuration consistently showed the lowest stress values across all loading scenarios. Specifically, stress levels ranged from 20 MPa to 50 MPa for bending in the XZ plane, 20 MPa-35 MPa for bending in the YZ plane, 20 MPa-30 MPa for extension in the Z-axis, and 18 MPa-25 MPa for compression in the Z-axis. The 4 × 10° and 4 × 20° configurations also produced satisfactory results, with stress levels not exceeding 70 MPa. However, the 4 × 0° configuration presented considerable stress during bending and compression in the Z-axis, with stress values exceeding 100 MPa, potentially leading to mechanical damage. In conclusion, the 2 × 20°; 2 × 0° screw configuration was identified as the most effective in minimizing stress on the treated bone. Future work will involve a more detailed analysis of this methodology and its potential integration into clinical practice, with a focus on enhancing patient outcomes in bone fracture treatment.
本研究探讨锁定钢板螺钉在肱骨骨折固定中的最佳放置位置，这是提高愈合效果和患者舒适度的关键因素。利用有限元法（FEM）建模，该研究旨在确定能在肱骨干中实现最佳应力分布的最有效螺钉配置。对肱骨进行了计算机断层扫描（CT），所得图像用于在SOLIDWORKS 2012中创建详细模型。然后使用ANSYS Workbench V13对该模型进行分析，以建立骨骼的有限元模型。研究了四种不同的螺钉配置：4×0°、4×10°、4×20°、2×20°；2×0°。这些配置在XZ和YZ平面上承受弯曲，以及沿Z轴的拉伸和压缩。研究确定2×20°+2×0°配置最为有利，在第一个螺钉处进行三点弯曲时，平均应力值低于30MPa，峰值应力值低于50MPa。在所有加载情况下，该配置始终显示出最低的应力值。具体而言，XZ平面弯曲时应力水平为20MPa至50MPa，YZ平面弯曲时为20MPa - 35MPa，Z轴拉伸时为20MPa - 30MPa，Z轴压缩时为18MPa - 25MPa。4×10°和4×20°配置也产生了令人满意的结果，应力水平不超过70MPa。然而，4×0°配置在Z轴弯曲和压缩时出现了相当大的应力，应力值超过100MPa，可能导致机械损伤。总之，2×20°；2×0°螺钉配置被确定为在使治疗骨头上的应力最小化方面最有效。未来的工作将涉及对该方法进行更详细的分析及其在临床实践中的潜在整合，重点是提高骨折治疗中的患者疗效。
