Patent ID: 8398688

Claim:
A bone screw with a shaft defining a longitudinal axis and a head adapted to be brought into engagement with a bone screw receiving means of a bone plate for the releasable connection of the bone screw to the bone plate, wherein a securing element is provided for securing a connection between the bone screw and the bone plate, wherein the bone screw is adapted to be brought from a position of engagement, the bone screw being held on the bone plate in said position, into a release position, the bone screw being releasable from the bone plate in said release position, wherein the securing element is adapted to be brought from a non-securing position, the bone screw being adapted to be brought into the release position in said non-securing position, into a securing position for securing the connection between the bone screw and the bone plate, the bone screw taking up the position of engagement in said securing position, wherein the securing element is supported on the bone screw so as to be movable, the bone screw further comprising at least one holding element, the at least one holding element exerting a biasing force on the securing element in the direction of the longitudinal axis to hold the securing element in the securing position, the head bearing a first snap-in element adapted to be interlocked with a second snap-in element arranged on the bone plate in the position of engagement, the shaft having a hole, the securing element being supported in the hole, the head comprising a plurality of locking elements movable transversely to the longitudinal axis, said locking elements being in engagement with the bone plate in the position of engagement, the bone screw further comprising a second snap-in device comprising a third snap-in element and a fourth snap-in element interacting with the third snap-in element, wherein the securing element and the head each bear a snap-in element and wherein the second snap-in device takes up a snap-in position after the insertion of the securing element into the hole, wherein the locking elements bear the fourth snap-in element.