Effect of change in patellofemoral joint contact area by the decrease in vastus medialis muscle activation on joint stress.

IF 0.8 4区医学 Q4 BIOPHYSICS

Acta of bioengineering and biomechanics Pub Date : 2023-01-01

Takabayashi Tomoya, Edama Mutsuaki, Inai Takuma, Kubo Masayoshi

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引用次数: 0

Abstract

Purpose: Patellofemoral pain syndrome is a common orthopedic trauma among runners. It is unclear whether patellofemoral joint stress (PFJS) is the highest (or lowest) when the knee joint flexion angle and extension moment are in combination under the condition that vastus medialis (VM) activation decreases. This study aimed to investigate the effects of changes in the PFJ contact area by decreasing the activation of the VM muscle on PFJS.

Methods: A PFJ sagittal model was used to quantify PFJ reaction force and PFJS. The PFJ model and mathematical modelling procedure were used to quantify PFJS based on previous studies. The simulation ranges were set to knee joint flexion angles of 10-45° and extension moments of 0-240 Nm. PFJS was calculated for the normal condition (NC) and decrease condition (DC) in VM activation.

Results: When the knee joint angle and knee joint moment were at the maximum, the PFJS showed the maximum value under both conditions (NC; 14.9 N/cm2, DC; 16.4 N/cm2). PFJS was found to be higher in DC than that in NC for all simulation ranges.

Conclusion: Decreased VM activation may be involved in the mechanism of patellofemoral pain syndrome. In addition, the results of this study provide evidence that clinicians can enhance VM to relieve pain in patients with patellofemoral pain syndrome.

本刊更多论文

髌股关节接触面积的变化对关节应力的影响（内侧阔肌活动减少）。

目的：髌骨股骨疼痛综合征是跑步者中常见的骨科创伤。目前尚不清楚在内侧肌（VM）激活减少的情况下，膝关节屈曲角和伸展力矩结合时髌股关节应力（PFJS）是否最大（或最小）。本研究旨在探讨通过减少 VM 肌肉的激活来改变 PFJ 接触面积对 PFJS 的影响：方法：使用 PFJ 矢状模型量化 PFJ 反作用力和 PFJS。根据先前的研究，PFJ 模型和数学建模程序用于量化 PFJS。模拟范围设定为膝关节屈曲角 10-45° 和伸展力矩 0-240 Nm。在 VM 激活的正常状态（NC）和减弱状态（DC）下计算 PFJS：当膝关节角度和膝关节力矩达到最大值时，PFJS 在两种条件下都显示出最大值（NC；14.9 牛/平方厘米，DC；16.4 牛/平方厘米）。在所有模拟范围内，DC 中的 PFJS 都高于 NC 中的 PFJS：结论：髌骨股骨痛综合征的发病机制可能与虚拟运动激活减少有关。此外，本研究结果还提供了证据，证明临床医生可以通过增强 VM 来缓解髌骨股骨疼痛综合征患者的疼痛。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Acta of bioengineering and biomechanics BIOPHYSICS-ENGINEERING, BIOMEDICAL

CiteScore

2.10

自引率

10.00%

发文量

期刊介绍： Acta of Bioengineering and Biomechanics is a platform allowing presentation of investigations results, exchange of ideas and experiences among researchers with technical and medical background. Papers published in Acta of Bioengineering and Biomechanics may cover a wide range of topics in biomechanics, including, but not limited to: Tissue Biomechanics, Orthopedic Biomechanics, Biomaterials, Sport Biomechanics.