Fig. 3

Surgical procedures. The PS PCT was attached to the femur (a), and the component gaps (CGs) by PS PCT were assessed at knee extension and flexion using the Offset Repo-Tensor® (OFR tensor) (b). Release around the intercondylar notch was performed by electrosurgical knife (c). In cases in which the flexion gaps were larger than the extension gaps, a small amount of resection of the posterior femoral condyle (less than component thickness; additional resection of < 5 mm) was performed to decrease the flexion gap by moving the drill hole posteriorly (d). The final cutting device was placed in the drill hole (e). After final bone resection, bone gaps (BGs) were measured (f), and final CGs with the trial femoral components after creation of the intercondylar box for post-cam structure were measured at knee extension and flexion (g). PS PCT, posterior-stabilised pre-cut trial component