Bone screw for use in bone fixation system for connecting two bone portions, has distal screw part and proximal screw part, where distal screw part has distal bone thread, and proximal screw part has proximal bone thread

摘要

The bone screw (20) has a distal screw part and a proximal screw part, where the distal screw part has a distal bone thread. The proximal screw part has a proximal bone thread. The distal screw part and the proximal screw part are displaceable relative to one another in a direction parallel to a longitudinal axis defined by the bone screw. A rotary coupling unit is provided for rotationally coupling of the distal screw part and the proximal screw part in the circumferential direction. An independent claim is included for a bone fixation system with a tool element.