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    • 5. 发明公开
    • Improved hip-joint prosthesis
    • VerbesserteHüftgelenkprothese
    • EP2386273A1
    • 2011-11-16
    • EP10162677.8
    • 2010-05-12
    • Smith & Nephew Orthopaedics AG
    • Wunderle, DirkSeidl, Alex
    • A61F2/30A61F2/36A61B17/16A61F2/00
    • A61F2/36A61B17/1659A61B17/1668A61F2002/30151A61F2002/30153A61F2002/30158A61F2002/30199A61F2002/30205A61F2002/30945A61F2002/3686A61F2230/0017A61F2230/0019A61F2230/0026A61F2230/0063A61F2230/0067
    • A method of optimizing the geometry of a femoral stem (20) of a hip joint prosthesis is disclosed. The femoral stem (20) comprises a neck (21) and an anchoring blade (29) that is attached to the neck (21) and that tapers towards a distal end (23) with a lateral narrow side (28) comprising a distal straight portion (33) and a proximal arcuate portion (32) corresponding to a curve. The transition between the distal straight portion (33) and the proximal arcuate portion (32) occurs at an outer lateral point (29). The method comprises a means of optimizing the profile of the curve of said proximal arcuate portion (32) by a process of iterative modeling steps using a series of curves each defined by a path traced by the outer lateral point (29) on withdrawal of a profile of the stem (20) from a cavity (35) of complementary shape to the stem (20). Preferably, during withdrawal of the profile of the stem (20) from the cavity (35) contact between lateral-distal (36) and proximal-medial (37) stem contours and respective associated boundaries of the cavity (35) are maintained. A femoral stem of a hip joint prosthesis produced by this method and a hip joint prosthesis system for use in the implantation of said femoral stem into a femur are also disclosed.
    • 公开了一种优化髋关节假体的股骨柄(20)的几何形状的方法。 股骨柄(20)包括颈部(21)和固定刀片(29),该固定刀片连接到颈部(21)并且朝向远端(23)渐缩,其中侧向窄边(28)包括远侧直线 部分(33)和对应于曲线的近端弓形部分(32)。 远端直部(33)与近端弓形部(32)之间的过渡处于外侧(29)的外侧。 该方法包括通过迭代建模步骤的过程来优化所述近端弓形部分(32)的曲线的轮廓的装置,所述迭代建模步骤使用由一系列曲线确定的曲线,所述曲线在由外侧点(29) 所述杆(20)从互补形状的空腔(35)到所述杆(20)的轮廓。 优选地,在将杆(20)的轮廓从空腔(35)中取出时,保持侧向远端(36)和近侧内侧(37)杆轮廓之间的接触以及空腔(35)的各自相关联的边界。 还公开了通过该方法产生的髋关节假体的股骨柄和用于将所述股骨柄植入股骨的髋关节假体系统。