DYNAMIC PEDICEL SCREW IMPLANT FOR VERTEBRAL ARCH

摘要

Disclosed is a dynamic pedicel screw implant for the vertebral arch, which comprises a screw base (1), a compression ring (2), a screw (4), a connecting bar (6) and a compression nut (7). The screw (4) includes a screw main body (16) and a connecting head (8), the connecting head (8) being accommodated in the screw base (1). The connecting bar (6) is arranged in an open slot of the screw base (1) and is located between the compression ring (2) and the compression nut (7). The compression nut (7) is used for screwing into the upper part of the screw base (1) so as to press the connecting bar (6) tightly. The dynamic pedicel screw implant for the vertebral arch is also provided with a screw bush (3) which is of a ball seat structure (13) on the inside. The connecting head (8) of the screw (4) has a spherical external structure, so that the ball seat structure (13) can fit the connecting head (8) of the screw (4). The dynamic pedicel screw implant for the vertebral arch of the present invention is able to provide not only the traditional multi-axial swinging, but also additional swinging angles after being locked, and it is able to ensure the stability of the spine.