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| 股骨颈骨折术后不同动作时股骨力学特性研究 |
| 王颖,马剑雄,柏豪豪,卢斌,孙磊,王岩,田爱现,董本超,靳洪震,秦国宁,李岩,马信龙 |
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| 天津市天津医院/天津大学天津医院骨科研究所天津300050 |
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| 摘要: |
| 目的:探究不同动作对股骨颈骨折术后股骨生物力学的影响，为术后康复提供理论指导。方法:选取天津医院2015年1月—2017年12月收治的股骨颈骨折术后评价复位质量良好患者30例，首先利用三维重建方法建立股骨颈模型，并对复位质量进行定量化测量。其次通过AnyBody软件建立股骨肌肉模型，在Geomagic Studio软件中实现股骨颈模型与股骨肌肉模型坐标的统一，位置大小的匹配；然后对股骨颈模型进行预处理，再经Hypermesh软件进行网格划分，建立股骨颈有限元模型。最后利用AnyBody软件进行动作模拟，包括站立、步行、起立和下蹲动作，逆向动力学分析比较日常动作间股骨的应力分布与应力峰值。结果:经测量30例股骨模型股骨头小凹最低点平均位移为(9.22±4.42) mm，股骨头中心平均位移为(5.32±2.98) mm，股骨头平均偏转角度为(19.73±11.61)°。站立时平均应力峰值为(18.97±7.8) MPa，步行过程中平均应力峰值为(66.85±36.18) MPa，起立过程中平均应力峰值为(61.74±114.38) MPa，下蹲过程中平均应力峰值为(1607.04±869.58) MPa。经统计分析，仅起立与步行动作之间股骨颈应力不具有显著性差异(P =0.82)，其余动作时股骨颈应力之间均有显著性差异(P<0.05)。结论:纳入的30例股骨颈都存在不同程度的空间移位。四个日常动作过程中，站立时股骨颈受力最小，其次是起立、步行，下蹲时股骨颈受力最大。 |
| 关键词: 股骨颈骨折 生物力学 AnyBody仿真 有限元分析 |
| DOI：10.3969/j.issn.1007-6948.2021.03.020 |
| 投稿时间：2020-09-17 |
| 基金项目:国家重点研发计划(2019TFC1511202-01)；国家自然科学基金(11772226；81871777)；天津市科技计划项目(18PTLCSY00070) |
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| Biomechanical Study of Femur after Operation of Femoral Neck Fracture in Different Movements |
| WANG Ying,MA Jian-xiong,BAI Hao-hao |
| Department of Orthopedics Research, Tianjin Hospital, Tianjin University, Tianjin 300050, China |
| Abstract: |
| Objective To explore the effects of different movements on the biomechanics of Femur after operation of femoral neck fracture, and to provide theoretical guidance for postoperative rehabilitation. Methods 30 patients with good reduction quality were randomly included in Tianjin Hospital from January 2015 to December 2017. Firstly, the femoral neck model was established by three-dimensional reconstruction method, and the quantitative parameters of reduction quality were measured. Secondly, the femoral muscle model is built by AnyBody software, and the coordinate of femoral neck model and femoral muscle model is unified and the position is matched in Geomagic Studio software. Then the femoral neck model is preprocessed, and the finite element model of femoral neck is established by Hypermesh. Finally, using AnyBody software to simulate the movements, including standing, walking, standing and squatting. The stress distribution and peak value of the femur during daily exercise were analyzed by inverse dynamics. Results The average displacement of the deepest portion of the femoral head fovea was [(9.22 ±4.42) mm], the average displacement of the center of the femoral head was [(5.32 ±22.98) mm], and the average rotational angle of the femoral head was [(19.73 ±11.61)°]. The stress peak of the femur was [(18.97±7.8) MPa] when standing, and [(66.85±36.18) MPa] during walking. In addition, during stand up, the stress peak of the femur was [(61.74±114.38) MPa], and [(1607.04±869.58) MPa] during squat down. There was significant difference among the 4 movements, except for the stand up and walking(P =0.82). Conclusion 30 cases of femoral neck included in the study all had different degrees of spatial displacement. During the four daily movements, the force on the neck of Femur is the least when standing, the next is standing and walking, and the force on the neck of femur is the greatest when squatting. |
| Key words: Femoral neck fracture biomechanics AnyBody simulation ?nite element analysis. |
