| Objective: A three-dimensional finite element simulation model of the ankle joint including the inferior tibiofibular syndesmosis ligament was constructed,and the stress distribution and the changes of cloud stress diagram of different inferior tibiofibular ligaments under four different stress mechanisms of the ankle joint were simulated by using the finite element analysis method,so as to explore the effects of different inferior tibiofibular ligaments on the stability of the ankle joint and provide guidance for the diagnosis of clinical injury of the superior tibiofibular ligament and preventing the injury.Methods:Based on the CT image information of ankle joint,combined with Mimics software and Geomagic Studio software,the ankle joint bone simulation model including tibia,fibula and talus is constructed,and then the model is imported into the finite element analysis software ABAQUS,then a three-dimensional finite element simulation model of the ankle joint including the main peripheral ligaments such as the lower tibiofibular ligament is constructed,Finally,the stress distribution and cloud stress diagram of different tibiofibular ligaments under four different stress mechanisms are simulated.To explore the biomechanical characteristics of different ligaments of lower tibiofibula.Results:When the ankle is loaded with internal rotation load,the stress of posterior tibiofibular ligament is the largest,and the stress value is 1.022 MPa.When the ankle is loaded with external rotation load,the stress of the transverse tibiofibular ligament is the largest,followed by the anterior tibiofibular ligament,and the stress values are 2.846 MPa and 1.498 MPa respectively.Under the vertical + internal rotation load of ankle joint,the stress of posterior tibiofibular ligament is the largest,and the stress value is 1.404 MPa However,the maximum stress value is higher than that of simple internal rotation load.Under the vertical + external rotation load of ankle joint,the stress of lower tibiofibular transverse ligament is the largest,followed by lower tibiofibular anterior ligament,and the stress values are 5.246 MPa and1.612 MPa respectively.However,the maximum stress value is higher than that of simple external rotation load.Conclusion: 1.The posterior inferior tibiofibular ligament plays a prominent role in preventing ankle pronation injury.2.The inferior transverse ligament and anterior inferior tibiofibular ligament are more effective in preventing ankle external rotation injury. |
