| 摘要 |
<p>The invention relates to a device for connecting a longitudinal bar to a pedicle screw (2) which forms part of a system for fixing the spinal column. Said device comprises a body (3) having an upper end (23), a lower end (24), a hole which is open at least towards the bottom (25) and has an axis (4), and a through hole (6), positioned perpendicular to the axis (4) and extending through the hole (25), through which a longitudinal bar (1) extending perpendicular to the axis (4) can be inserted. The device also has a collet chuck (7) mounted coaxially on the inside of the body (3) in such a way that it can slide along the axis (4). Said collet chuck has a through hole (17) which is flush with the through hole (6) of the body (3), and a chamber (19) which faces at least downwards and is defined by tongues (8) spring-mounted against the cylinder axis (4). The head (9) of a pedicle screw (2) can be clicked into this chamber from below by spring-action. The device is easy to use and makes it possible for the pedicle screw to be inclined within a certain range.</p> |
