Patent ID: 6190390
Filing Date: 2001-02-20
Classification: A61B

Abstract:
An instrument system for creating a dome osteotomy at a selected location on a proximal tibia, the dome osteotomy having a semi-cylindrical surface contour configuration with an arcuate profile configuration placed at the selected location, the instrument system comprising:a first guide component having a longitudinal length, a lateral width, an altitudinal thickness, and a plurality of apertures extending altitudinally through the first guide component and placed along an arc which follows the arcuate profile configuration of the dome osteotomy, the apertures being aligned essentially parallel to one another and including corresponding central axes extending altitudinally, essentially parallel to one another;a plurality of cannulas, each cannula of the plurality of cannulas having a length greater than the altitudinal thickness of the first guide component, an inside guide surface for receiving a complementary drill and an outside guide surface complementary to a corresponding one of the plurality of apertures for being received within the one aperture for guiding the complementary drill along a drill path aligned with the corresponding central axis of the one aperture; anda first guide component affixation arrangement for affixing the first guide component to the proximal tibia with the arc of the plurality of apertures placed in juxtaposition with the selected location of the arcuate profile configuration;the length of each cannula being great enough to assure that each drill path is located in an array of essentially parallel drill paths, with the array creating a pattern for the surface contour configuration of the dome osteotomy located at the selected location on the proximal tibia.