An endoprosthetic bone joint device developed for the elbow, but applicable elsewhere, has two hinge components respectively defining complementary first and second bearing surfaces for mutual articulatory engagement, and each apertured to define third bearing surfaces. When implanted the hinge components...http://www.google.es/patents/US3939496?utm_source=gb-gplus-sharePatente US3939496 - Endoprosthetic bone joint
