Method for planning knee replacement surgery comprising proximal and local morphological, prosthetic design and prosthetic position related parameters

A computer-implemented method of planning knee replacement surgery, the method comprising:

• Receiving input related to an anatomy of a patient, wherein the input comprises imaging data related to the femur, the tibia, the patella, the hip, pelvis, the fibula, the ankle, and the bones in the foot;
• & Generating a three-dimensional (3D) model of the anatomy based on the input, wherein the 3D model comprises a patella model, a model of the femur, the tibia, the fibula, the pelvis, the hip, the ankle and the bones in the foot;
• Characterizing a morphology of the patella, the femur, the tibia, the fibula, the hip, the pelvis, the ankle and the bones in the foot based on the 3D model;
• Determining one or more implant-related or morphological parameters based on one or more of the 3D model and the morphology;
• Performing one or more morphological and biomechanical simulations based on the one or more implant-related or morphological parameters, wherein the simulations include one or more poses of the patella-femoral and tibio-femoral joint through a range of motion thereof and a range of motion of the hip and the ankle;
• Optimizing a position, an orientation and a size of the femur implant relative to the native femur and patella based on the one or more morphological and/or biomechanical simulations;
• Optimizing a position, an orientation and optionally a size of the tibia implant relative to the femur implant, femur implant position and patella based on the one or more morphological and biomechanical simulations;
• and
• Outputting patient-specific planning information to one or more of an external computing device, visual display and a computer-readable storage device;
• characterized in that
• the morphological parameters include local morphological parameters of the femur, the tibia, the patella and proximal and distal morphological parameters;
• the implant-related parameters include the prosthetic design-related parameters and the prosthetic position and orientation-related parameters;
• and
• the patient-specific planning information considers the relative position of the patella to the femur and optionally the tibia in function of the range of motion of the knee.