Bone-anchoring device for a pedicle access

A bone anchoring device for anchoring and fixing vertebrae, and for insertion into a pedicle canal, with a fork head having a U-shaped cutout in a side view for a correction element, a connecting rod with two legs which terminate proximally and form a threaded section which engages with an adjusting means, wherein the legs have a radially outer circumferential area in which at least one retaining groove or other instrument attachment point is formed for gripping the fork head by means of a handling instrument,

• and a bone anchoring element, with a proximal end facing away therefrom in the axial direction, such that a distal direction and a proximal direction are also defined, wherein the bone anchoring element has a spherical head at the proximal end area and the bone anchoring element can be pivoted polyaxially with respect to the fork head, and the bone anchoring element is mounted with the fork head coming from the distal end,
• wherein the bone anchoring element has a mainly cylindrical core, and in that two wings extend laterally and the wings have a distal wing orientation and a proximal wing orientation different therefrom, and in that the wings form helically between these wing orientations, and in that the bone anchoring element is not screwed into the bone but is hammered in, and in that, after implantation of the bone anchoring element into a vertebra, the outer surfaces of the wings at the proximal area point in the direction of the cranial and caudal areas of the pedicle canal and distally, the projected area that is formed by the core and the lateral wing surfaces is aligned in the cranial/caudal direction in the cancellous bone of the vertebra.