公开(公告)号：US20060276906A1

公开(公告)日：2006-12-07

申请号：US11353392

申请日：2006-02-14

申请人： Stephen Hoag ,  Dale Degroff ,  Douglas Wentz ,  Leslie Gilbertson ,  Roy Crowninshield

发明人： Stephen Hoag ,  Dale Degroff ,  Douglas Wentz ,  Leslie Gilbertson ,  Roy Crowninshield

IPC分类号： A61F2/36

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.

摘要翻译： 用于假肢髋关节的假肢髋部。 臀部柄通常包括具有杆部和颈部的芯，基本覆盖芯的茎部的聚合物基质层和基本上覆盖聚合物基质层的多孔金属层。 聚合物基质层连接芯和多孔金属层，并且可以在其间进行注模。 臀部柄部的颈部具有相对较薄或细长的轮廓，其允许髋部柄相对于假肢髋关节的髋臼部件的更大程度的关节运动。 髋关节杆的颈部还包括版本指示器元件，例如凸起或凸起，其可由外科医生触觉地感觉以帮助外科医生在微创全髋关节置换手术期间定位髋骨柄，例如 由外科医生直接观察髋部骨骼可能是不可能的。 此外，臀部柄的芯包括凹槽，脊，平面，凹痕或其他特征，以增强芯和聚合物基质层之间的机械互连。