PROSTHETIC STEM AND CENTRALISER

摘要

A combined prosthetic stem (4) and a centraliser (2) in which the centraliser (2) is of open-ended cylindrical shape with a plurality of semi-circular fins (8) extending radially and longitudinally from the cylinder. The stem (4) is in the form of a femoral hip stem and has a shoulder (16) at its distal end (14) at which the diameter of the stem (4) is suddenly reduced resulting in a distal portion (32) of the stem (4) with a smaller diameter. The centraliser (2), when disposed on the stem (4), has an outer diameter which is flush with the diameter of the stem (4) above the shoulder (16). The stem (4) is cannulated to allow cement to be inserted into the bone cavity through the stem (4). The open-ended nature of the centraliser (2) allows cement to pass through the centraliser (2).