Table 1.
Changes in knee extensor parameters due to flexion and size of the femoral component
| + 3° FFC | Size + | Size − | |
|---|---|---|---|
| PTMAflex | 0% | 0% | 0% |
| PTMAext | + 1% | + 6% | − 7% |
| PTF | − 2% | − 5% | + 7% |
| QMF | − 2% | − 7% | + 8% |
| QTFF | + 2% | + 11% | − 15% |
| PFCF | − 2% | − 10% | + 12% |
Changes of patellar tendon moment arm at knee flexion (PTMAflex), at knee extension (PTMAext), peak patellar tendon force (PTF), quadriceps muscle force (QMF), quadriceps tendon-to-femur force (QTFF), and patellofemoral contact force (PFCF) during rising-from-a-chair simulations due to varying size and flexion of the femoral component (FFC). Variations are expressed as average percentage increase (+) or decrease (-) relative to the reference case (size 4, 0° FFC) for every 3° increase of FFC (+ 3° FFC) and for a bigger size (Size +) and a smaller size (Size −)