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    Fully porous prosthetic hip stem
    6.
    发明授权
    Fully porous prosthetic hip stem 有权

    公开(公告)号：US10070961B2

    公开(公告)日：2018-09-11

    申请号：US11353392

    申请日：2006-02-14

    申请人： Stephen H. Hoag ,  Dale A. Degroff ,  Douglas H. Wentz ,  Leslie N. Gilbertson ,  Roy D. Crowninshield

    发明人： Stephen H. Hoag ,  Dale A. Degroff ,  Douglas H. Wentz ,  Leslie N. Gilbertson ,  Roy D. Crowninshield

    IPC分类号： A61F2/36 ,  A61F2/30

    CPC分类号： A61F2/36 ,  A61F2/30767 ,  A61F2/30907 ,  A61F2002/30535 ,  A61F2250/0058

    摘要： A prosthetic hip stem for use in a prosthetic hip joint. The hip stem generally includes a core having a stem portion and a neck portion, a polymer matrix layer substantially covering the stem portion of the core, and a porous metal layer substantially covering the polymer matrix layer. The polymer matrix layer connects the core and the porous metal layer, and may be injection molded therebetween. The neck portion of the hip stem has a relatively thin or slender profile which allows for an increased degree of articulating movement of the hip stem with respect to the acetabular component of a prosthetic hip joint. The neck portion of the hip stem additionally includes a version indicator element, such as a bump or a protrusion, which may be tactilely felt by a surgeon to aid the surgeon in positioning the hip stem during a minimally invasive total hip arthroplasty procedure, for example, where direct visualization of the hip stem by the surgeon may not be possible. Additionally, the core of the hip stem includes grooves, ridges, flats, dimples or other features to enhance the mechanical interconnection between the core and the polymer matrix layer.