Patent ID: 8728085
Filing Date: 2014-05-20
Classification: A61B

Abstract:
1. An assembly for use in cutting a bone during a surgical procedure, comprising: a cutting tool having a cutter that is adapted to cut the bone along a cutter axis, the cutter being in the form of blade or of a rotatable bit, and a drive unit for imparting a cutting motion to the cutter; and a guide block positionable against the bone having a reference slot or bore extending along a central reference axis for guiding the cutting tool during the cutting step, the guide block having a screen surface having a reference mark thereon that indicates proper alignment of the cutter, wherein the cutting tool includes a light source positioned such that light emitted from the light source is emitted in a direction parallel to the cutter on to the screen surface when the cutter is in contact with the reference slot or bore, a distance between the cutter axis and the light beam being equal to a distance between the central reference axis and the reference mark on the screen surface.