Cruciate Retaining Total Knee Replacement

The many reasons for retaining the posterior cruciate ligament (PCL) during total knee replacement (TKR)

Include improved stability.
Reduced shear stresses at the fixation interface.
Improved proprioception.
More efficient gait patterns during level walking and stair climbing.
Moreover, one of the most commonly cited motives for retaining the PCL is to preserve femoral rollback, which improves extensor efficiency by lengthening the moment arm and improves the range of flexion by minimizing the potential for impingement of the femur on the tibial component, reducing loosening and excessive polyethylene wear.