APPARATUS FOR GUIDING A SURGICAL INSTRUMENT

摘要

Apparatus for guiding a cutting tool in a surgical procedure on a bone comprises a fixation block which can be fitted on to a bone, and a guide bloAk which can be fitted on to the fixation block, the guide block defining a path for a cutting tool. The guide bl>Ak can be translated relative to the fixation bl>Ak along a translation axis so as to vary the distance between the guide block and the fixation bl>Ak. The orientation of the guide block relative to the fixation bl>Ak can be adjusted rotationally about a pivot axis which is approximately perpendicular to the translation axis. The apparatus includes a worm drive assembly for adjusting the orientation of the guide block rotationally relative to the fixation bl>ck about the said pivot axis.