1.1 This practice covers a laboratory-based in viro method for evaluating the mechanical performance of materials and devices being considered for replacement of the tibio-femoral joint in human knee joint replacement prostheses in mobile bearing knee systems.
1.2 Mobile bearing knee systems permit internal external rotation to take place on one or both articulating surfaces.Some designs place physical limits or stops to the amount of rotation. Other designs may have increases of a resistance force with increases in rotation.
