INSTRUMENT ASSEMBLY FOR IMPLANTING A REVISION HIP PROSTHESIS

摘要

A surgical instrument assembly for use during a surgical procedure to implant an orthopaedic hip prosthesis, includes a trial shaft having a cylindrically-shaped stem, and a locking screw having a number of threads formed in a distal end thereof, the locking screw being rotatable relative to the cylindrically-shaped stem. A discrete trial neck can be removably secured to the trial shaft. The trial neck has a bore formed in it with the stem of the trial shaft being received into the bore so as to allow for rotation of the trial neck relative to the trial shaft. A locking mechanism can be used to lock the rotational position of trial neck relative to the trial shaft.