Artificial facet joint
    9.
    再颁专利
    Artificial facet joint 失效
    人造小关节

    公开(公告)号:USRE36758E

    公开(公告)日:2000-06-27

    申请号:US16776

    申请日:1998-01-30

    申请人: William R. Fitz

    发明人: William R. Fitz

    摘要: A spinal facet prosthesis for a diseased or painful facet joint comprises a superior component and an inferior component. The superior component is roughly conical or pyramidal in form and is fastened to and over the distal tip of the inferior articular process of the diseased or painful facet joint. The inferior component is also roughly conical or pyramidal in form with one side elongated postero-medially and distally. The outer surface of the elongated side of the inferior component is of low friction, such as polished chromium coating or medical grade high-density polyethylene. The inferior component is fastened to and over the superior articular process of the diseased or painful facet joint. Each component is made of a biocompatible material. The inner surface of each component which is in contact with its respective articular process is coated with a porous coating to enhance the adhesion of each component to its respective articular process.

    摘要翻译: 用于患病或疼痛小关节的脊柱小面假体包括上部组件和下部组件。 上部组件大致呈圆锥形或金字塔形,并且固定在患病或疼痛小关节的下关节突的远端上方。 下部组件也大致呈圆锥形或金字塔形,其中一侧在后侧和远端延伸。 下部部件的细长侧的外表面具有低摩擦力,例如抛光铬涂层或医用级高密度聚乙烯。 下部组件固定在患病或疼痛小关节的上关节突的上方。 每个组件由生物相容材料制成。 与其各自的关节过程接触的每个部件的内表面涂覆有多孔涂层以增强每个部件对其各自的关节过程的粘附。