Three-dimensional Finite Element Analysis On The Impact Of PCL-deficient To Biomechanics Of Knee Cartilage

Initial set up three-dimensional finite element model of knee joint,including posterior cruciate ligament and other joint ligament,and other main structure such as meniscus and articular cartilage.Understand the impact of PCL-deficient to biomechanics of knee cartilage,provide theoretical basis for the early reconstruction of posterior cruciate ligament injury and prevention of secondary damage to the cartilage or OA.Methods:Using normal knee CT and MRI scan data to testablish normal three-dimensional finite element entity model of knee joint with E-feature Biomedical Modeler and ANSYS.Definition material properties and boundary conditions, contact with different loading condition simulation of complete knee joint and lack PCL,calculate with ANSYS,Record and analysis the result,then comparison for knee joint cartilage stress distribution under different load conditions.Results:1.Three-dimensional finite element model of human knee join is successfully established,and proves that the model is reliable,then simulated the PCL-deficient on the modle.2.The peak stress of medial tibia platform cartilage and medial articular condyle cartilage increased by17.5%and17.5%respectively in response to a compressive load of1150N and an anterior tibial load of134N,The peak stress of medial tibia platform cartilage,lateral tibia platform cartilage,medial articular condyle cartilage and lateral articular condyle Increased by17.3%,25.9%,28.1%and5.00%respectively in response to a compressive load of1150N and an external rotation torque tibial load of5N.Contact area and stress peaks location have no obvious change.Conclusion:1.Three-dimensional finite element model of human knee join is reliable.2.PCL-deficient led to an increased stress on platform of tibial and femoral condyle cartilage.Under the long-term effects may lead to secondary cartilage injury and OA.