| 摘要 |
<p>The invention concerns a connecting device (1) for osteosynthesis designed to connect a screw (2) capable of being implanted in the backbone to a rod (13) supporting the vertebral column. The screw (2) consists of a first lower threaded portion (3), a head (4) with surfaces (5) and with a curved base and a second upper curved portion (7), in the extension of the first (3). A nut (8) with curved base (9) is capable of co-operating with the second threaded portion (7). A connecting piece (10) has, for being connected to the screw (2), a hole whereof the internal diameter is greater than the screw (2) second threaded portion (7) external diameter, and around said hole, two curved upper and lower bearing surfaces such that the screw (2) is locked in position on the connecting piece (10), after the nut (8) has been screwed, by squeezing the nut (8) curved base (9) on the upper bearing surface and squeezing the lower bearing surface on the screw (2) head (4) curved base.</p> |
