BONY BALANCING APPARATUS AND METHOD FOR TOTAL KNEE REPLACEMENT

摘要

Total knee replacement surgery is improved through custom cuts on the distal femur without resorting to expensive computer navigation. The method involves measurements on plain radiographs or CT scans prior to surgery, the amount of bone that would be resected on each knee, medially and laterally on the distal femur. In the preferred embodiments, the predetermined distance is in the range of 8-12 mm, more preferably 10 mm, and the resulting distance from the second line to the apex of the lateral condyle is in the range of 6 to 7 mm. A cutting fixture is provided and used to resect the medial condyle at the predetermined distance and the lateral condyle at the measured resulting distance.

主权项

1. A method of resecting a distal femur in conjunction with total knee replacement surgery, comprising the steps of:
obtaining an image of a patient's femur, the image including a hip joint with a femoral head and a knee joint with medial and lateral condyles and an intercondylar notch; identifying a first line on the image from the center of the femoral head to the center of the distal femur and the intercondylar notch; identifying a second line perpendicular to the first line, the second line being at a predetermined, arbitrary distance from the apex of the medial condyle; , measuring the resulting distance from the second line to the apex of the lateral condyle; providing a specialized, dedicated cutting fixture to resect the medial condyle at the predetermined distance and the lateral condyle at the measured resulting distance; and resecting the medial and lateral condyles using the fixture.