Patent ID: 7717942

Claim:
A bone screw, comprising: a screw head having a U-shaped fork head with a coupling opening, a preassembled screw body comprising at least a first and a second screw body part which are connected to one another with a tightening torque which is greater than a release torque required to remove the bone screw from a bone, said screw body defining a longitudinal axis and being provided with a screw body external thread and having a proximal end and a distal end, a coupling element formed on the proximal end of the screw body for detachably connecting the screw body to the screw head, wherein: an edge of the coupling opening forms an axial stop for the coupling element for limiting a movement of the coupling element relative to the screw head in a distal direction, a maximum outside diameter of the screw body is larger than an inside diameter of the coupling opening, the coupling element is disposed on a proximal end of the first screw body part and the second screw body part carries the external thread of the screw body, the first screw body part has a first connection element for a detachable connection to a second connection element disposed on the second screw body part, the first screw body part has a distal end, which can be introduced in the distal direction through the coupling opening and which comprises the first connection element; the second connection element comprises an internal connection element thread, the first connection element comprises an external connection element thread corresponding to the internal connection element thread, and the internal connection element thread and the external connection element thread are disposed coaxially with the longitudinal axis of the screw body.