abstract a bone fixation system has a bone implant with an implant body. the implant body defines an upper surface, a bone-facing surface spaced from the upper surface along a transverse direction, and at least one aperture defined by an inner wall. a bone fixation element is configured for insertion at least partially through the aperture. the bone fixation element has a head and a shaft that extends relative to the head in a distal direction. the head defines a ridge and at least one thread that is spaced from the ridge in the distal direction. the ridge is configured to compress a bone implant against at least one thread only as to fixedly retain the bone implant with respect to the head. "Bone Fixation System" The present invention relates to a bone fixation system having a bone implant with an implant body. the implant body defines an upper surface, a bone-facing surface spaced from the upper surface along a transverse direction, and at least one opening defined by the inner wall. A bone fixation element is configured for at least partial insertion through the opening. The bone fixation element has a head and a stem that extends relative to the head in a distal direction. the head defines a crest and at least one thread that is spaced from the crest in the distal direction. the ridge is configured to compress a bone implant against at least one thread so as to securely retain the bone implant relative to the head.abstract a bone fixation system has a bone implant with an implant body. the implant body defines an upper surface, a bone-facing surface spaced from the upper surface along a transverse direction, and at least one aperture defined by an inner wall. a bone fixation element is configured for insertion at least partially through the aperture. the bone fixation element has a head and a shaft that extends relative to the head in a distal direction. the head defines a ridge and at least one thread that is spaced from the ridge in the distal direction. the r