Human Foot And Ankle Gait Analysis And Mechanical Study Of Calcaneal Fractures

Gait analysis explores the related theories and motion mechanisms of foot and ankle gait from a mechanical point of view,thus providing powerful theoretical guidance and help for the development of medicine.Aiming at the complex problems of the stress and force transmission of various tissues during the movement of the foot and ankle,this article takes the foot and ankle as the research object,establishes the foot skeleton model,and introduces the gait motion,reverse engineering technology,Opensim simulation and finite element simulation to the foot The theoretic analysis and simulation study were carried out on the movement and mechanical function of the department,and further treatment of the calcaneus and fracture patterns was analyzed based on the results of the investigation.The main work of this article is as follows:(1)Introduction to foot and ankle gait and kinematic analysis.Through the introduction of the foot and ankle musculoskeletal system,the study of gait analysis process and cycle,and the study of ankle joint activity method,the system coordinates are established,and on this basis,the kinematics analysis is combined with the study of gait theory.(2)Reverse reconstruction of the skeletal muscle model of the foot and ankle.Based on the computer tomography theory,data collection and processing of the research object,generating foot medical images,and using reverse engineering technology,using MIMICS software to reverse reconstruction of the foot and ankle musculature model,according to surface processing technology,using Geomagic Warp The software refined the leg and foot model.(3)Research on gait of ankle walking,running and falling.Using the human motion simulation software Opensim to study the normal gait of the human body,such as normal walking,running and falling from a height,according to the research results combined with the basic principles of skeletal muscle modeling and simulation,the static analysis of the static state of the foot and ankle model was performed using the ABAQUS software The kinetic analysis of the high-altitude drop results in the stress and strain between the bones and ligaments of each foot and the contact stress between the ankle and the ground.The results show that under normal standing and walking conditions,the changes of each foot bone and ligament are within the normal range,and the calcaneus and talus that first contact the ground when falling from a high place will produce greater strain and contact force,and the ligament It will change drastically.When the falling speed or height reaches a certain value,it will exceed the bearing range of the foot bones and ligaments,resulting in fractures or ligament strain.(4)Study on the mechanism of calcaneal fracture and its stability after fixation.According to the results of gait simulation,the theoretical analysis and finite element simulation of the fracture mechanism of the calcaneus were further carried out for the critical state of falling from a height,and three typical fixation methods were adopted to simulate the comparison of the fixed calcaneus.The comparison results show that the mechanical shape of the calcaneus fixed by the hospital-made steel plate is very different from that of the original calcaneus,thus verifying the effectiveness of the fixation method and the stability of the calcaneus after surgery.