Joint prosthesis having ceramic abrasion layer
    5.
    发明授权
    Joint prosthesis having ceramic abrasion layer 有权
    关节假体具有陶瓷磨损层

    公开(公告)号:US6120545A

    公开(公告)日:2000-09-19

    申请号:US269873

    申请日:1999-04-01

    摘要: The invention relates to a joint prosthesis comprising two metal parts which are movable with respect to one another. The surfaces of the metal parts are covered with an abrasion layer of ceramic material which has a hardness which is greater than that of the carbides present in the metal. The carbides are worn away by the abrasion layer. As a result, the overall wear behavior of the two metal parts of the prosthesis is improved considerably, and the metal surface of the prosthesis parts is not affected by the carbides during movement. The metal components are preferably spaced apart from one another at a distance of at most 0.2 millimeter. This close fit improves the wear action. Owing to the relatively thin wear layer, the particles formed during the wearing process are small enough to be discharged into the space between the joint parts by synovial fluid.

    摘要翻译: PCT No.PCT / NL97 / 00553 Sec。 371日期1999年4月1日 102(e)1999年4月1日PCT 1997年10月6日PCT PCT。 第WO98 / 14140号公报 日期:1998年04月9日本发明涉及一种关节假体,其包括可相对于彼此移动的两个金属部件。 金属部件的表面被陶瓷材料的磨损层覆盖,该陶瓷材料的硬度大于金属中存在的碳化物的硬度。 碳化物被磨损层磨损。 结果,假体的两个金属部件的整体磨损行为显着改善,并且假体部件的金属表面在运动期间不受碳化物的影响。 金属部件优选地彼此间隔至多0.2毫米。 这种紧密配合可以改善磨损作用。 由于相对较薄的磨损层,在磨损过程中形成的颗粒足够小以便通过滑液排出到关节部分之间的空间中。