Biomechanical Characteristics Of Knee Joint Injury Caused By Long-term Weight-bearing Standing

Compared with other joints,knee joints bear more weight and move frequently,which makes them play a crucial role.In this paper,biomechanics was used to further study the biomechanical characteristics of injury caused by standing with weight.When the human body regularly stands for a long time or stands with weight,the knee joint is in a state of compression for a long time,which is easy to cause chronic injury of the knee cartilage,meniscus,and cruciate ligament.Studies have shown that the injury of the knee joint is closely related to the mechanical environment of the knee joint,so it is necessary to carry out further research on the mechanical characteristics of the knee joint without injury or after the occurrence of lesions.In this study,finite element technology was used to analyze knee joint weight-bearing.First,a CT test was performed on the subjects,data acquisition was combined with software Mimics for 3D reconstruction,and a file was generated and then imported into the Geomagic software for the establishment of the finite element model.After that,the Hypermesh software was used to mesh the knee joint module for material allocation and the accuracy and effectiveness of the model were proved by referring to relevant literature.Then,the finite element analysis software ABAQUS was used to establish the finite element model of the complete knee joint and the injured knee joint.The boundary conditions were set up to analyze the biomechanical stress of the knee joint under two conditions: no-weight standing and weight-bearing standing.Finally,the correlation between the stress changes in knee joint and the results of clinical diagnosis was analyzed.The results showed that the overall stress of the knee joint was > tibial cartilage stress >femur cartilage stress > meniscus contact stress > meniscus stress when the human body stood without knee injury and weight bearing.The stress of the tibial cartilage was greater in each tissue than that of the tibial cartilage.When the knee joint load changes obviously,with the increase of the load,the tissue stress value of the knee joint also increases.The stress of tibial cartilage and femur cartilage increased significantly when the knee cartilage was injured while standing,compared with that when the knee cartilage was standing without injury.The stress value of tibial cartilage increased by 42.40% and that of femur cartilage increased by 31.29%,and the stress value of tissues in all parts of the knee joint was greater than that when the knee joint was standing without injury and bearing 20 kg.The results of the questionnaire interview and clinical diagnosis found that the knee joint of soldiers of a grass-roots unit of the Air Force was at risk of injury.According to the review,the increase of different load forces can cause knee injury in basic troops,especially in soldiers who continue to work and train normally after the injury.Therefore,in daily life to knee injury prevention training and learning,do a good job of relevant protection and preventive measures,after the occurrence of injury,timely and active medical treatment.