Index to Evaluate Position of Tibial Tuberosity.

概要

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We developed a new index to quantify the position of the tibial tuberosity in the anteroposterior direction relative to the patellar groove of the femur in degrees (angles), based on the lateral radiograph of the knee. This index is the angle TT between a tangent to the patellar groove, which is parallel to the central line of the tibial shaft and the line from the most anterior point of the tibial tuberosity to the point of the contact between the tangent and the patellar groove. The angle TT increased linearly with knee flexion and the mean value was 6° at 30° of knee flexion, and 22° at 90° of knee flexion. The correlation was 0.826.With this index, the position of the tibial tuberosity in knees with Osgood-Schlatter disease was expressed 6° anteriorly compared with that in normal knees.
西日本整形・災害外科学会の論文