Hip stem

Andrew A. Amis (Inventor), Bidyut Pal (Inventor)

    Research output: Patent


    A stem (100) for use in a joint prosthesis, such as a femoral stem for a hip joint prosthesis, the stem comprising: a solid central core (102); a proximal outer layer (127) disposed over a proximal portion (101a) of the central core, wherein the proximal outer layer comprises a set of longitudinal ribs (120), defining slots (130) there between; and a distal outer layer made of a deformable porous material disposed over a distal portion (101b) of the central core. The arrangement is such that the stem (100) can be made with a relatively large diameter yet without being excessively stiff, for cementless fixation in osteoporotic patients. The deformability of the distal outer layer also mitigates against the risk of intraoperative bone fractures.
    Original languageEnglish
    Patent numberGB1500481.5A
    Priority date13/01/16
    Filing date13/01/16
    Publication statusPublished - 22 Nov 2017


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