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    • 1. 发明授权
    • Acetabular shell having flared rim and fixation spikes
    • 髋臼具有扩张的边缘和固定尖峰
    • US5972032A
    • 1999-10-26
    • US985637
    • 1997-12-05
    • Jorge LopezAaron Hofmann
    • Jorge LopezAaron Hofmann
    • A61F2/00A61F2/30A61F2/34A61F2/46
    • A61F2/34A61F2/30767A61F2/4609A61F2002/30382A61F2002/30805A61F2002/30841A61F2002/30848A61F2002/30892A61F2002/30968A61F2002/3404A61F2002/3412A61F2002/3451A61F2002/3461A61F2002/4631A61F2220/0033A61F2310/00407
    • An acetabular component for an implantable hip joint prosthesis. An acetabular shell has an apex and a rim, and has a convex proximal surface for being received within a hemispherically reamed acetabulum in a press-fit relationship. The convex proximal surface is shaped as a surface of revolution defined by a curve segment rotated about an axis, where the curve segment and the axis lie in a common plane. The defining curve segment includes a first arc-segment and a second arc-segment. The first arc-segment has a center located on the axis, and the second arc-segment has a center offset from the axis. The convex proximal surface includes a first region defined by the first arc-segment in proximity to the apex and a second region defined by the second arc-segment in proximity to the rim. The convex proximal surface is diametrically oversized in the second region relative to the hemispherically reamed acetabulum. At least one bone-penetrating protrusion extends generally proximally from the convex proximal surface, but is limited in proximal extent to remain unengaged with the hemispherically reamed acetabulum at initial contact of the oversized second region with the hemispherically reamed acetabulum during implantation.
    • 用于植入式髋关节假体的髋臼部件。 髋臼壳具有顶点和边缘,并且具有凸起的近侧表面,用于以压合关系接收在半球形铰孔臼形体内。 凸形近端表面被定形为由围绕轴线旋转的曲线段限定的旋转表面,其中曲线段和轴线位于公共平面中。 定义曲线段包括第一弧段和第二弧段。 第一弧段具有位于轴上的中心,第二弧段具有与轴的中心偏移。 凸近端表面包括由第一弧形段限定在靠近顶点的第一区域和由靠近边缘的第二弧形段限定的第二区域。 凸起的近端表面在第二区域中相对于半球形扩孔的髋臼径向超大。 至少一个骨穿透突起从凸近端表面大致向近侧延伸,但是在近端程度上受到限制,以在植入期间在超大尺寸的第二区域与半球形扩孔的髋臼的初始接触期间保持与半球形扩孔的髋臼未接合。