Lockable polyaxial screw

Abstract

The invention relates to a pedicle screw (1) comprising: - a screw (10) with a spherical head (11), - a sleeve (20) receiving the spherical head (11) via a ball joint, and having a receiving location (21) for a connecting rod (50) between several pedicle screws (1), - a nut (30) intended to be screwed into the sleeve (20) to lock the rod, - a ring (40) housed in the sleeve (20) and configured to bear against the spherical head (11), and having a recess (41) for receiving a tool to manipulate the ring (40) between a release position of the spherical head (11) and a locking position of the spherical head (11). According to the invention, the ring (40) is disposed between the spherical head (11) and the location (21) of the rod (50) within the sleeve (20). Figure for the abbreviation: Fig. 3

Inventors

BARREY CEDRIC-YVES-ROBERT-PASCAL
BEN MOKHTAR MOURAD
SAUZON THÉO

Assignees

SPINEWAY

Dates

Publication Date: 20260501
Application Date: 20221212
Priority Date: 20221212