| 摘要 |
<p>A vertebral retrieval device (10) includes a retrieval rod (20) which is gripped firmly in a receiving slot (31) of a fixation seat (30) between two grooves of a pressing element (63) and a C-shaped ring (50). The C-shaped ring (50) rests on a spherical head fastening screw (40), a spherical head (42) of which is received in the fixation seat (30) and a shank of which is protruding from a through hole (32) provided in a bottom of the fixation seat (30). The pressing element (63) is pressed against the retrieval rod (20) by a pressing screw (62), which is threaded into a threaded hole (612) formed in a fixation element (61) mounted in the receiving slot of the fixation seat (30).</p> |
