基于步态康复训练的股骨颈骨折内固定运动学分析和稳定性评估

IF 1.7 4区 医学 Q3 ENGINEERING, BIOMEDICAL Medical Engineering & Physics Pub Date : 2024-08-05 DOI:10.1016/j.medengphy.2024.104222
Haowei Zhang , Jianhang Lv , Xinsheng Xu , Jiong Mei , Ying Liu
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引用次数: 0

摘要

为了探索不同内固定方法在不同术后条件下对股骨颈骨折的生物力学影响,我们进行了力学分析,包括静态和动态评估。最终,建立了机械稳定性评价体系,确定了各机械指标的权重和各样本的评价得分。在静态分析中,发现每个模型的机械稳定性都能满足骨折后的固定要求。在愈合过程中,空心钉上的最大应力略有增加,应力分布从多点分布转变为更均匀的单点分布,这有助于骨折愈合并降低应力集中的风险。在动态分析中,共振点经常出现在低频处。随着行走速度的增加,最大应力显著增加。在低速情况下,最大应力接近材料的屈服极限。在循环动态加载下,循环次数勉强达到愈合期的要求,步行速度的增加可能导致疲劳断裂。本研究建立的评估模型综合考虑了静态和动态分析中的不同力学性能。基于各种力学分析和评估系统,可从多个维度评估内固定治疗方案的适用性,为每例股骨颈骨折治疗提供最佳模拟力学方案。
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Kinetic analysis and stability evaluation of femoral neck fracture with internal fixation based on gait rehabilitation training

To explore the biomechanical effects of different internal fixation methods on femoral neck fractures under various postoperative conditions, mechanical analyses were conducted, including static and dynamic assessments. Ultimately, a mechanical stability evaluation system was established to determine the weights of each mechanical index and the evaluation scores for each sample. In static analysis, it was found that the mechanical stability of each model met the fixation requirements post-fracture. During the healing process, the maximum stress on the hollow nail slightly increased, and stress distribution shifted from multi-point to a more uniform single-point distribution, which contributes to fracture healing and reduces the risk of stress concentration. In dynamic analysis, resonance points frequently occurred at low frequencies. With increasing walking speed, the maximum stress increased significantly. At slow speeds, the maximum stress approached the material's yield limit. Under cyclic dynamic loading, the number of cycles barely met the requirements of the healing period, and increasing walking speed may lead to fatigue fractures. The evaluation model established in this study comprehensively considers different mechanical performances in static and dynamic analyses. Based on various mechanical analyses and evaluation systems, the applicability of internal fixation treatment plans can be assessed from multiple dimensions, providing the optimal simulated mechanical solution for each case of femoral neck fracture treatment.

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来源期刊
Medical Engineering & Physics
Medical Engineering & Physics 工程技术-工程:生物医学
CiteScore
4.30
自引率
4.50%
发文量
172
审稿时长
3.0 months
期刊介绍: Medical Engineering & Physics provides a forum for the publication of the latest developments in biomedical engineering, and reflects the essential multidisciplinary nature of the subject. The journal publishes in-depth critical reviews, scientific papers and technical notes. Our focus encompasses the application of the basic principles of physics and engineering to the development of medical devices and technology, with the ultimate aim of producing improvements in the quality of health care.Topics covered include biomechanics, biomaterials, mechanobiology, rehabilitation engineering, biomedical signal processing and medical device development. Medical Engineering & Physics aims to keep both engineers and clinicians abreast of the latest applications of technology to health care.
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