Patellofemoral kinematics during deep knee flexion after total knee replacement: a computational simulation

摘要: Actions requiring deep knee flexion, such as kneeling and squatting, are challenging to perform after total replacement (TKR), though many manufactures emphasize that their prostheses could safely achieve high flexion. Little is known about the patellofemoral kinematics during This study aimed track movement of patella squatting through dynamic computational simulation. A validated model was used analyse patellar TKR, including shifting, tilting rotation. The data were captured from full extension 135° For kneeling, an anterior force 500 N applied perpendicularly on tibial tubercle flexed 90° 135°. a ground reaction tibia found shifting rotation in similar those while squatting. However, had greater medial tilt showed signs abrupt owning external being concentrated tubercle. In terms movements, latter more strenuous action for joint TKR due forces acting It suggested overweight patients or flexion should try avoid reduce risk polyethylene wear. Further modification trochlear geometry may be required accommodate changes tilting. II.