KBARS Study: The effect of knee prosthesis design on knee biomechanics during locomotion following knee replacement surgery

1. Patients implanted with a medial pivot prosthesis design, an cruciate sacrificing design characterised by high-conformity in the medial compartment (socket on the insert, as well as anterior and posterior lips to prevent femoral translation) and a flatter tibial surface on the lateral side to facilitate tibiofemoral rotation with an axis located on the medial side. Alternative designs such as cruciate-retaining (CR) do not feature medial-lateral differences in geometry and retain the posterior-cruciate ligament. Posterior stabilized knees (PS) also sacrifice the cruciate ligaments, but maintain stability through a post and cam system. 2. Each participant will be followed up for a one-hour session at a minimum follow-up of 12months post knee replacement surgery.