An intraosseous screw includes at least one external thread, a receiving element extending into and parallel to the external thread, and connecting members connecting the individual screw threads of the external thread. The or each external thread has capillary through-channels that pass through the screw so as to end in the receiving element. The connecting members define a plurality of through-openings. The receiving element is shaped so as to be able to receive a cylindrical bone portion once the intraosseous screw has been screwed into the bone.