| 摘要 |
<p>The invention relates to a multiaxial pedicle screw for vertebral osteosynthesis, said invention including: a pedicle screw (10) that is to be implanted into the bone portion of a vertebra and comprises a spherical head (12) having a recess (13) for the rotation of said pedicle screw (10); a socket (20) that is hinged onto the spherical head (12) of the pedicle screw (10) and is provided with two diametrically opposed side grooves (21) for receiving a connection rod (30); a tightening means (40) for maintaining the position of the connection rod (30) that is engaged into said socket (20); and a locking means that is positioned between said spherical head (12) of the pedicle screw (10) and the socket (20). According to the invention, the locking means is formed of a ring (50), at least the base or distal portion (52) of which consists of a cold-compactible material having a resilient deformation capacity. Said locking means enables the locking of the socket (20) in a desirable direction relative to the spherical head (12) of the pedicle screw (10) according to the position of the pedicle screw (10) after the anchoring thereof.</p> |
