摘要：

The invention relates to a polyaxial pedicle screw (12), comprising a threaded shaft (16) with a shaft axis (18) and with a screw head (20) as well as a tulips head (22) with a rod receiving (28) and with a thread (36) for screwing in of a locking device (52). A clamping sleeve (44), extends in the tulips head (22) from the screw head (20) in a to the longitudinal axis (26) of the tulips head (22) axial direction into the rod receptacle (28) of the drawing. The pedicle screw has a locking device (52) with a locking sleeve (56) which is connected, via the thread (36) of the tulips head (22) in a predetermined locking position relative to the tulips head (22) can be screwed, wherein the locking sleeve (56) in the locked position against the clamping sleeve with its free end (64) and the screw head (20) by means of the locking sleeve via the clamping sleeve (44) in the axial direction in such a way against the tulips head (22) can be tensioned in that the tulips head (20) on the screw head (20) can be fixed. The locking device also has a clamping screw (58) which, in an internal thread (62) of the locking sleeve (56) engages, and by means of which the rod (56) in the rod receptacle (28) of the tulips head (22) can be fixed in accordance with the invention, the locking sleeve (56) at its free end (65) at least two recesses (74) for the rod (30), which on the locking sleeve (56) are arranged diametrically opposite one another.

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