Patent ID: 7033360

Claim:
A method for the preoperative determination of positioning data of endoprosthetic parts of a knee joint relative to a thigh bone and a lower leg bone forming the knee joint, comprising the steps of: moving the thigh bone of the knee joint relative to a corresponding hip bone, to determine a first articular point for said thigh bone in the area of the hip joint; determining a second articular point for said thigh bone in the area of the knee joint; determining a first characteristic direction for said thigh bone by way of a straight-line connection of the first and second articular points; moving the lower leg bone of the knee joint relative to a corresponding ankle bone, to determine a third articular point in the area of an ankle joint for said lower leg bone; determining a fourth articular point in the area of the knee joint for said lower leg bone; determining a second characteristic direction for said lower leg bone by way of a straight-line connection of the third and fourth articular points; and determining the orientation of endoprosthetic parts relative to the first and second characteristic directions.