An anchoring element for use in bone, with an external and an internal wall. The external wall has externally threaded peripheral surface facilitating the embedding of the anchoring element within the bone, and the internal wall has an internal peripheral surface that, taken together with the externally threaded peripheral surface, define an annular wall around a hollow central portion and around a longitudinal axis. At least one non-radial slot passes through the externally threaded peripheral surface, the annular wall, and the internal peripheral surface, such that at least one pointed fluke is defined at a juncture of the non-radial slot and the outer peripheral surface for cutting the bone and directing bone fragments into said hollow central portion, wherein the at least one pointed fluke extends from a fluke leading face to a fluke trailing face, and wherein the fluke leading face is skewed relatively to said fluke trailing face.
