Introduction
knee arthroplasty, TKA
SECONDARY
Total knee arthroplasty (TKA) is a common orthopaedic procedure that aims to create a “natural knee” that has similar function and kinematics as those of the native knee. Since its inception, TKA techniques and implant designs have evolved to achieve that goal. There is a 25% unsatisfaction rate with current implant designs, cruciate-retaining (CR), or posterior-stabilized (PS) TKAs [The concept of the medial pivot implant is to create a centre of rotation on the medial side so that the lateral side can translate anteriorly or posteriorly during extension and flexion [The primary objective of this study was to determine whether there was any difference in postoperative range of motion between patients whose PCL was resected and patients whose PCL was preserved in simultaneous bilateral TKA with medial pivot implants. It is hypothesized that sacrificing the PCL in TKA with medial pivot implants results in a better range of motion than retaining the PCL. The secondary objectives are to compare the functional outcomes and limb alignment of those 2 groups of patients treated with simultaneous bilateral TKA at the short-term follow-up. The second hypothesis was that sacrificing the PCL in TKA with medial pivot implants results in better functional outcomes and better limb alignment.