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    Spondylolisthesis screw and instrument for implantation
    1.
    发明授权
    Spondylolisthesis screw and instrument for implantation 有权
    脊椎前移螺钉和植入器械

    公开(公告)号：US08388659B1

    公开(公告)日：2013-03-05

    申请号：US12589160

    申请日：2009-10-19

    申请人： Eric A. Lab ,  Mukund Gundanna

    发明人： Eric A. Lab ,  Mukund Gundanna

    IPC分类号： A61B17/70

    CPC分类号： A61B17/7037 ,  A61B17/7082 ,  A61B17/7086 ,  A61B2090/037

    摘要： A screw for use in spinal surgery provided with a screw shaft and a screw head and at least one extension tab extending proximally from the screw head, the extension tab being defined relative to the screw head by a stress concentration feature. At a proximal end of the extension tab, the extension tab may be narrower in a circumferential direction than the extension tab at a distal portion thereof. A particular shape of stress concentration may be provided.

    摘要翻译： 一种用于脊柱手术的螺钉，其具有螺钉轴和螺钉头以及从螺钉头向近侧延伸的至少一个延伸突出部，所述延伸突片通过应力集中特征相对于所述螺钉头限定。 在延伸片的近端处，延伸片在圆周方向上比在其远端处的延伸片更窄。 可以提供特定形状的应力集中。

    Frictional polyaxial screw assembly
    6.
    发明授权
    Frictional polyaxial screw assembly 有权
    摩擦多轴螺丝总成

    公开(公告)号：US08197517B1

    公开(公告)日：2012-06-12

    申请号：US12117613

    申请日：2008-05-08

    申请人： Eric A. Lab ,  Peter A. Materna

    发明人： Eric A. Lab ,  Peter A. Materna

    IPC分类号： A61B17/70

    CPC分类号： A61B17/864 ,  A61B17/7037 ,  A61B17/8805

    摘要： Various embodiments are provided with a polyaxial spinal screw assembly that comprise a threaded screw having a bulbous or curvate head, and a receiver for receiving the head of the screw, and a slotted collet between the receiver and the screw head. The collet may, in an un-locked condition, bear against the head of the screw to frictionally retain the screw's angular position. The collet may have a lip that may engage with a corresponding internal feature of the receiver. The screw head may be able to be inserted into the receiver through the bottom of the receiver. The screw may be cannulated and also may be fenestrated. Embodiments may also include a bone screw having fenestration holes that include a component in the rotational direction, such as backward-facing with respect to the forward-rotational direction of the screw.

    摘要翻译： 各种实施例设置有多轴脊椎螺钉组件，其包括具有球形或弯曲头部的螺纹螺钉，以及用于接收螺钉头部的接收器和在接收器和螺钉头之间的开槽夹头。 夹头可以在未锁定的状态下抵靠螺钉的头部以摩擦地保持螺钉的角度位置。 夹头可以具有可以与接收器的相应内部特征接合的唇缘。 螺钉头可能能够通过接收器的底部插入接收器。 螺钉可以是插管的，也可以是开窗的。 实施例还可以包括具有开孔的骨螺钉，该开孔包括沿旋转方向的部件，例如相对于螺杆的向前旋转方向的后向。