Patent ID: 9456859
Filing Date: 2016-10-04
CPC Classification: A61B

Claim Text:
1. A polyaxial pedicle screw comprising a threaded shaft portion for anchoring the pedicle screw in a vertebra, said pedicle screw having one axial end provided with a shaft head which is coupled to a mounting sleeve for a longitudinal beam in a rotatable and/or pivotable manner, comprising a fixing device for the selective positional fixation of the mounting sleeve with respect to the shaft portion, the fixing device comprising a locking element for exerting a holding force on the mounting sleeve as well as a separate counterforce part counteracting the holding force of the locking element and being designed and/or retained in such a manner that the holding force of the locking element can be selectively released by means of the counterforce part, wherein the counterforce part is designed as a manually destroyable disposable part and/or is provided with an opening mechanism by means of which the counterforce part can be altered in terms of its dimensions and/or is movably supported such that it can be moved from a functional position to a non-functional position.