Implant

An orthopaedic fixture for an orthopaedic prosthesis, said fixture being arranged to be screwed into a bore having an open end in a resected bone surface and arranged to be permanently anchored in bone tissue, comprising a ball carrying portion and an intraosseous anchoring structure of a generally circular cross-section, said anchoring structure comprising a first cylindrical section of a first diameter and a second cylindrical section of a second diameter, said second diameter being less than said first diameter, said first and second cylindrical sections each being provided with a screw thread profile of the same hand, characterized in that said anchoring structure comprises a tapered connecting section provided between and interconnecting said first and second cylindrical sections, wherein the diameters at the respective end of the connecting section correspond to the diameters of the first and the second cylindrical sections, respectively, and in that said fixture comprises a collar section which is arranged proximally to said first cylindrical section of the anchoring structure adapted to abut said resected bone surface.