Patent ID: 8911234

Claim:
A bone implant shaped to be implanted in an implantation direction parallel to an implant axis in a cavity surrounded by a cavity wall of bone tissue and comprising: an implant portion to be implanted, said implant portion having an outer surface and an inner surface, said outer surface defining depressions and chip forming cutting edges, said inner surface including energy directors and defining a hollow space that receives liquefiable material that is liquefied by mechanical oscillation, wherein openings that lead from the hollow space to the depressions are formed through the implant portion, said openings serving as passageways to direct and communicate liquefied material from the hollow space to the depressions and thereby form surface ranges at predefined locations on the outer surface of the implant portion that protrude from the depressions, and wherein the energy directors are disposed at an inlet to the openings; and wherein the chip forming cutting edges are capable of cutting the cavity wall of bone tissue, said cutting edges not extending in a common plane with the implants axis, said cutting edges facing toward a distal end region of the implant and extending at least partly around the circumference of the implant, and wherein said cutting edges are spaced from the implant axis by implants-axis-to-cutting-edges-distances, which are decreasing in the implanting direction.