BUTLER, MICHAEL, S.,YOUSSEF, JIM A.,HILIBRAND, ALAN, S.
申请号：
EP05705519
公开号：
EP1703849A4
申请日:
2005.01.13
申请国别(地区):
EP
年份:
2013
代理人:
摘要：
A pedicle screw coupling construct (31, 120, 140, 191, 260) for a pedicle screw construct (30, 190, 286) provides fixation of angular orientation (β, Ϝ, θ) thereof relative to a pedicle screw (32) independent of fixation of a received spinal rod (25, 170, 250, 280) to the coupling construct (31, 120, 140, 191, 260). The pedicle screw construct (30, 190, 286) forms one component or element in a spinal fixation system. The independent fixation coupling construct also provides for fixation of the angular orientation of the coupling construct while the coupling construct has received the spinal rod. In another form, a coupling head or construct (31, 120, 140, 191, 260) is configured to allow a pedicle screw shaft (42) to pass therethrough but retain the pedicle screw head (44) for rotation of the coupling head about the pedicle screw head. The coupling head or construct (31, 120, 140, 191, 260) is also configured to allow at least a 45° arc of pivot or articulation about a pedicle screw shaft (42) relative to a longitudinal axis of a spinal rod (25, 170, 250, 280) received in the body. This allows the head with a received spinal rod to fold, bend or pivot relative to the pedicle screw shaft, particularly to a greater degree than the prior art.
