电针治疗膝骨性关节炎患者上下楼梯的三维有限元分析

doi:10.3969/j.issn.0258-8021.2021.03.08

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Abstract To explore the availability of finite element analysis method to simulate the biomechanical properties of knee osteoarthritis in the treatment of ascent and descent stair movements, the correlation between the changes of knee biomechanical behavior and the efficacy of electro-acupuncture treatment was compared. Based on image data obtained from CT and MRI, in combination with medical image processing software including Mimics and Geomagic, we established the three-dimensional finite element model of knee flexion 15° downstairs and 50° upstairs. The model included bone and soft tissue structures such as femur and tibia, humerus, medial and lateral meniscus, femoral cartilage, medial and lateral iliac cartilage. The stress distribution of the medial and lateral meniscus, femoral cartilage and medial and lateral tibial cartilage under electroacupuncture treatment were compared by applying the corresponding load on the center of the femoral condyle of the knee joint model of ascent and descent stairs. The research of knee osteoarthritis under electroacupuncture showed that the stress of the medial and lateral meniscus, femoral cartilage, and medial and lateral tibial cartilage was restored to varying degrees after electroacupuncture treatment. The maximum stress at the descent stairs was reduced by 0.543, 0.236, 0.194, 0.239 and 0.327 MPa, respectively. The maximum stress at the ascent stairs was reduced by 0.253, 0.31, 0.227, 0.112 and 0.122 MPa. The stress peak of each cartilage further tends to the normal knee joint, and the stress distribution range was closer to the normal state. The medial cartilage and meniscus of the joint were more loaded than the lateral side, which was consistent with the phenomenon that the clinical medial type of knee osteoarthritis is more than the lateral type. Therefore, it was demonstrated that electroacupuncture treatment could affect the transmission of the force in the knee joint, delay the degradation of cartilage in various parts of the knee joint, and make the stress ratio of each cartilage closer to the normal value. Therefore, the stability of the diseased knee joint was improved. In conclusion, the electroacupuncture treatment could effectively alleviate the stress concentration of articular cartilage in patients with knee osteoarthritis. The biomechanical properties of knee osteoarthritis under electroacupuncture could provide a theoretical basis for the treatment options of clinical knee joints.

Key words： knee joint electroacupuncture treatment ascent and descent stair biomechanical properties finite element analysis

Received: 20 July 2019

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R318

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	Articles by authors
	Xu Haifei
	Zhao Gaiping
	Yang Jiajing
	Wang Xiangbin
	Xu Shixiong

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Xu Haifei,Zhao Gaiping,Yang Jiajing, et al. Three-Dimensional Finite Element Analysis of Electroacupuncture for Patients with Knee Osteoarthritis During Ascent and Descent Stair[J]. Chinese Journal of Biomedical Engineering, 2021, 40(3): 321-329.

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http://cjbme.csbme.org/EN/10.3969/j.issn.0258-8021.2021.03.08 OR http://cjbme.csbme.org/EN/Y2021/V40/I3/321

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