抄録
When patellar dislocation occurs in the knee joint, surgical treatment is needed as soon as possible. The mechanism of patellar dislocation must be elucidated to ensure optimum surgical treatment of each patient. We studied proximal patellar movement in the standing position. The 3-D geometry of the articular surface of the femur and the patella and the attachment point of the tibial tuberosity were constructed from successive cross-sectional plane MRI images. 3-D patellar movement was constructed from front and side images of the knee joint taken by X-ray video imaging. The force exerted on the patella can be determined from these data. As a result, it was found that the direction of the quadriceps force is parallel to the Mikulitz line on the front view of the knee joint, and the magnitude increases monotonically to 800 Newtons and remains constant thereafter.
