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1. 发明申请

US20120232598A1 POLYAXIAL PEDICLE SCREW WITH INCREASED ANGULATION 有权
标题翻译：多轴螺旋桨螺旋增加
公开(公告)号：US20120232598A1
公开(公告)日：2012-09-13
申请号：US13044174
申请日：2011-03-09
申请人： HUGH D. HESTAD , JACK A. DANT , ERIC J. LUNDEQUAM , ERIC P. JERKE , DEBORAH L. HOCH
发明人： HUGH D. HESTAD , JACK A. DANT , ERIC J. LUNDEQUAM , ERIC P. JERKE , DEBORAH L. HOCH
IPC分类号： A61B17/86 , B23P11/02
CPC分类号： A61B17/7038 , A61B17/7032 , A61B17/7037 , Y10T29/49863
摘要： A polyaxial bone anchor including a housing and a bone screw. A bottom surface of the housing includes an aperture that defines an angulation limit of the bone screw for each azimuthal angle around a longitudinal axis of the housing. The aperture is V-shaped, with the V-shape having converging side walls that define a low-angulation direction near their intersection and a high-angulation direction opposite the low-angulation direction. In some cases, the angulation limit of the bone screw is generally constant over a range of azimuthal angles centered around the high-angulation direction. The housing may be modular, including tabs on one component that are plastically deformed to engage a lip on another component. During assembly, a mandrel advances longitudinally along a bore in the housing, and forces the tabs radially outward toward the lip to a radially outward plastically deformed state.
摘要翻译：一种包括壳体和骨螺钉的多轴骨锚。壳体的底表面包括孔，其围绕围绕壳体的纵向轴线的每个方位角限定骨螺钉的角度限制。孔径为V形，V形具有会聚侧壁，其在其交点附近限定低角度方向，并且具有与低角度方向相反的高角度方向。在一些情况下，骨螺钉的角度范围在以高角度方向为中心的方位角范围内通常是恒定的。壳体可以是模块化的，包括一个部件上的突出部，其被塑性变形以与另一部件上的唇接合。在组装期间，心轴沿着壳体中的孔纵向延伸，并且迫使突片径向向外朝向唇部径向向外塑性变形状态。

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