The present invention is intended to provide a plastic jacket for a cementless artificial joint stem, wherein shear force detrimental to the service life of an artificial joint can be markedly reduced and stress shielding phenomena can also be markedly relieved, due to the construction of the plastic...http://www.google.com/patents/US20010014829?utm_source=gb-gplus-sharePatent US20010014829 - Plastic jacket for a cementless artificial joint stem and artificial joint having the jacket
