be placed on the feet to set the AP and internal/external rotation of the femoral implant. The feet may be rounded in the sagittal plane to better fit the tibial geometry. The AP sizer may be provided with variable thickness boots which are inserted to compensate for femoral posterior wear....
In the early 1990s, Whiteside’s group compared cadaver patellar tracking and knee stability to that of TKA using the Ortholoc II prosthesis.51External rotation of 5° provided better stability and patellar tracking than neutral or internal rotation. It was postulated that the external rotation comp...
The design objective of the knee is to create a joint with a large amount of flexion–extension movement but also with some movement in rotation [47]. The knee also has a function of locking in the fully extended position which helps reduce the effort involved in standing [48]. The knee...