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    • 8. 发明公开
    • PARTIAL HIP PROSTHESIS
    • 部分HIP PROSTHESIS
    • EP2512379A2
    • 2012-10-24
    • EP10795336.6
    • 2010-12-16
    • Tepic, Slobodan
    • Tepic, Slobodan
    • A61F2/34A61F2/36A61F2/32
    • The invention reduces friction and wear in partial hip prosthesis by combining optimized geometry of the articulation and surface treatment of the prosthetic component. The acetabulum is reamed to the bone. One of the articulating surfaces - either that of the reamed acetabulum, or that of the femoral head prosthesis is a-spherical so that a fluid-filled gap is formed at the area of major load transfer. The fluid-filled gap is sealed by an annular area of contact, over which the concave and the convex components are congruent. The preferred surface treatment is by diamond-like coating, which results in very low coefficient of friction and high abrasion resistance against the bone. The prosthetic head is fixed to the femur by either a conventional stem, a perforated shell, or a femoral neck prosthesis screwed onto the femur so that it is partially covered by bone and partially exposed on the medial-inferior aspect, where it abuts the reamed cortex of the calcar region.
    • 本发明通过结合关节的优化几何形状和假体部件的表面处理来减少部分髋关节假体中的摩擦和磨损。 髋臼骨折。 其中一个铰接表面 - 铰接髋臼或股骨头假体的表面为球形,以便在主要载荷传递区域形成流体填充间隙。 流体填充的间隙由接触的环形区域密封,凹面和凸面部件在该环形接触面上一致。 优选的表面处理是通过类金刚石涂层,其导致非常低的摩擦系数和对骨的高耐磨性。 通过常规的杆,穿孔的外壳或股骨颈假体将假体头固定到股骨上,所述假体旋拧到股骨上,使得其被骨部分地覆盖并且部分地暴露在内侧下方,其中它邻接铰接 钙质区域的皮层。