US 6,190,390 B1Granted

Apparatus and method for creating a dome tibial osteotomy

AssigneeHowmedica Osteonics Corp.

InventorCraig M. McAllister

Life of this patent

Estimating the term…

Loading patent…

Abstract

An instrument system and a method for creating a dome osteotomy having a semi-cylindrical surface contour configuration with an arcuate profile configuration at a selected location on a proximal tibia utilize a first guide component having a plurality of apertures placed along an arc which follows the arcuate profile configuration of the dome osteotomy and a cannula received in each aperture for establishing an array of parallel drill holes forming a pattern for the surface contour configuration of the dome osteotomy. A second guide component includes a slot which follows the arcuate profile configuration of the dome osteotomy and which is juxtaposed with the array of drill holes to guide osteotomes along the slot and into the tibia to create the surface contour configuration of the dome osteotomy. The osteotomes have a lateral curved configuration for following the arcuate profile configuration and footed osteotomes are used to reach behind the patellar tendon for completing the full dome osteotomy.

Claims13

Dependent claims

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;
and
a 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.

2 more elements

An improvement in a method 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 improvement comprising the steps of:

placing a first guide component on the tibia, the first guide component having 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;
locating the first guide component so as to juxtapose the arc of the plurality of apertures with the location of the arcuate profile configuration of the dome osteotomy;
placing a cannula in each of the plurality of apertures, the cannula 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;
and
guiding a complementary drill along each inside guide surface to establish an array of essentially parallel drill holes in the tibia, the array creating a pattern for the surface contour configuration of the dome osteotomy located at the selected location on the proximal tibia.

2 more elements

Dependencies are inferred from the claim text.