In 1947, Shiers, a British Orthopaedic Surgeon, developed the first true knee joint replacement, which was a simple hinge joint, pivoting around a central pin. From this early design, other types of knee prostheses evolved, but they all functioned in much the same way as a basic hinge joint, with no attempt made to replicate the complex motion of a normal knee. This was primarily because there was little knowledge of the way in which a physiologically normal knee moves.
In most types of total knee replacement devices there are four parts:
a metal “femoral” component which is placed in … Read the rest