发明名称 |
Multi-axial spinal fixation system |
摘要 |
A spinal fixation system includes a rod and anchor devices that include a bone engaging fastener having a head defining a spherical socket. A ball insert is placed within the socket and rotated so that the ball insert is juxtaposed with the socket. The anchor device further includes a yoke defining a yoke channel for receiving the rod and a stem engaged to the ball insert captured within the socket. A sleeve disposed between the yoke channel and the fastener head supports the rod. A set screw is operable to clamp the rod against the sleeve and draw the insert into engagement within the socket. A friction element in the form of a wave spring is disposed between the yoke and the fastener head is configured to releasably retain the yoke in at least one discrete position relative to the fastener. |
申请公布号 |
US9545279(B2) |
申请公布日期 |
2017.01.17 |
申请号 |
US201313942823 |
申请日期 |
2013.07.16 |
申请人 |
Spine Wave, Inc |
发明人 |
James Anthony;Schwarz Tawney |
分类号 |
A61B17/70;A61B17/86;A61B17/84 |
主分类号 |
A61B17/70 |
代理机构 |
Hoffmann & Baron, LLP |
代理人 |
Hoffmann & Baron, LLP |
主权项 |
1. An anchor device for anchoring an elongated rod to the spine, comprising:
a fastener having a connecting portion and a head, said head of said fastener defining a socket having a socket opening; a yoke having a channel for receiving the elongated rod therein, said yoke being coupled to said head of said fastener in a manner to allow articulating movement of said yoke relative thereto; an element disposed within said socket for coupling said yoke to said head of said fastener in a manner to allow articulating movement of said yoke relative to said socket; a fixation structure between said yoke and said element operable to fix said yoke and said element together, said fixation structure including a threaded bore defined in one of said yoke and said element, a threaded stem adapted for threaded engagement with said bore extending from the other of said yoke and said element; and a spring element supported between said yoke and the head of said fastener externally of said socket in direct contact with said yoke and configured to releasably retain said yoke in a discrete position relative to said fastener. |
地址 |
Shelton CT US |