Knee replacement system and method for enabling natural knee movement
AssigneeBiomet Manufacturing, LLC
InventorsThomas P. Andriacchi, Jorge O. Galante
Life of this patent
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Abstract
A method of implanting a knee replacement system in a leg with a femur and a tibia of a patient can include, implanting a femoral component onto a condyle of the femur and placing a trial tibial component on a tibial plateau of the tibia. The tension of a posterior cruciate ligament can be adjusted. The tension of an anterior cruciate ligament can be adjusted. The posterior position of the trial tibial component can be adjusted. The knee condition at toe off onset can be simulated during walking.
Claims12
A method of implanting a knee replacement system in a leg with a femur and a tibia of a patient, comprising the steps of:
- implanting a femoral component onto a condyle of the femur in the leg;
- placing a trial tibial component on a tibial plateau of the tibia in the patient;
- adjusting the tension of a posterior cruciate ligament;
- adjusting the tension of an anterior cruciate ligament;
- adjusting the posterior position of the trial tibial component;
- simulating knee condition at toe off onset during walking, the toe off onset knee condition comprising nearly full leg extension with posterior displacement and internal rotation of the tibia;
- adjusting the anterior position of the trial tibial component such that the posterior cruciate ligament in the leg resists the toe off knee condition;
- marking a position of the trial tibial component at the adjusted posterior and anterior positions;
- and
- implanting a tibial component onto the tibial plateau in the patient in the marked position that articulates with the femoral component.
Dependencies are inferred from the claim text.