title: Load testing of geometric and polycentric total knee replacements.
abstract: Static loading of implanted geometric and polycentric knee replacements was conducted in order to define fixation characteristics and load capabilities of the prostheses and the bone prostheses interface. Failures occurred in some specimens at load levels normally encountered across the knee joint during ambulation. Disruption of the tibial bone-cement interface and crushing of the tibial plateau were the modes of failure. There was no failure on the femoral side of the joint. The major determinants of stress failure suggested by this study were: (1) the tibial bone strength, (2) the design of the geometric and polycentric tibial component, and (3) method of component implantation.
mesh_terms: D000368:Aged; D001696:Biomechanical Phenomena; D001843:Bone Cements; D005260:Female; D006801:Humans; D066298:In Vitro Techniques; D007595:Joint Prosthesis; D007719:Knee Joint; D008297:Male; D008875:Middle Aged; D013314:Stress, Mechanical
chemical_list: D001843:Bone Cements