System for anchoring a pedicle screw, associated kit, spacer and pedicle augmentation

A system for anchoring a pedicle screw in a vertebra of a patient, in particular in the lumbar or thoracic region of the spinal column, the system comprising:

• a pedicle screw having a threaded portion sinkable in the vertebral arch including the pedicle, comprising at least one spacer filling at least in regions the space between the threaded portion and cortical edge layer of the pedicle, the spacer being configured or positioned with respect to the threaded portion in the pedicle cross section such that an all-round support of the threaded portion at the cortical edge layer via the at least one spacer is enabled.

A kit for a system for anchoring a pedicle screw in a vertebra of a patient, the kit comprising a pedicle screw having a threaded portion sinkable in the vertebral arch including the pedicle, comprising at least one spacer filling at least in regions the space between the threaded portion and cortical edge layer of the pedicle, the spacer being configured or positioned with respect to the threaded portion in the pedicle cross section such that an all-round support of the threaded portion at the cortical edge layer via the at least one spacer is enabled.

A spacer for a system for anchoring a pedicle screw in a vertebra of a patient, the spacer comprising:

• a cylindrical body having an essentially oval cross-section for the form-locking fit in a corresponding axial recess of the pedicle, said axial recess being sunk in the pedicle, and having an axial through-hole for the accommodation of the threaded portion of a pedicle screw.

A spacer for a system for anchoring a pedicle screw in a vertebra of a patient, the spacer comprising an essentially cylindrical pedicle augmentation which has essentially the shape of a bone screw or a bone dowel and has a cylindrical recess on one side for the radial support of a threaded portion of a pedicle screw.