Cup component of an orthopaedic joint prosthesis

A method of implanting the cup component of an orthopaedic joint prosthesis having a hollow shell wherein the head part of a mating component of the joint can be received, the shell having a periphery, an open face and a flange at the open face extending around at least part of the periphery, the flange having at least a first, a second and a third threaded bore extending therethrough, wherein the method includes the steps of:

• placing the cup component in a prepared cavity;
• inserting through the first threaded bore a temporary screw having a self-drilling tip for forming a bore in a bone, so that the screw cuts a bore in bone tissue adjacent to the cavity and engages the bone threadingly, and also engages the thread in the first threaded bore;
• using a drill to prepare at least two bores in the bone, one each of the two bores being aligned with the second and third threaded bores of the flange;
• inserting a first fixation screw through the second threaded bore so that the first fixation screw threadingly engages the bore in the bone aligned with the second threaded bore;
• inserting a second fixation screw through the third threaded bore so that the second fixation screw threadingly engages the bore in the bone aligned with the third threaded bore;
• and
• removing the temporary screw.