Articular Surface-to-Tibial Baseplate Micromotion on the Natural-Knee^® II and Natural-Knee^® Flex Components

The function of the locking mechanism between the ultra high molecular weight polyethylene (UHMWPE) articular surface and the tibial baseplate is to ensure that the two components remain connected and to minimize the relative motion that may occur between them. This relative motion that can occur between the two components has the potential to generate wear debris, which may eventually lead to bone osteolysis [1–2].